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Load Cells Built for Stress Testing

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Stress testing with load cells is an integral part of research, design, and manufacturing processes for various products and components. It helps to ensure that material, equipment, and final products can withstand the stresses they will be subjected to in regular use.

Stress testing with load cells involves applying a known load to a test specimen and measuring the resulting strain. The strain is then used to calculate the stress, which measures the force per unit area.

For destructive stress testing, the test specimen is loaded to failure. The failure load is then used to calculate the ultimate tensile strength (UTS) of the material. In non-destructive testing, the test specimen is loaded to a predetermined stress level and then unloaded. The stress-strain curve is then plotted to determine Young’s modulus and the yield strength of the material.

Selecting the right load cell for any stress testing protocol is important. A detailed review of the sensor’s performance specifications is where to start. Consider the quality of the load cell, along with the materials used to build the testing device and the strain gages.

In designing and building load cells, material composition and build quality play a critical role in the quality, accuracy, and overall lifetime of a load cell. This is especially true when testing involves long, stress-test cycle testing. Interface load cells are designed for optimum fatigue life.

Built for Stress

When looking for a load cell that needs to go the distance over long periods, it’s essential to understand the difference between sensors built for stress and those not. In materials science, the S-N curve is a well-known tool. It is a graphical representation of the number of load cycles required to break a specimen at the range of peak cyclic stress levels.  S-N curves for the high-quality materials used in Interface load cells determine the stress level.

Commonly selected load cells used for high-stress level testing are known as fatigue-rated. Fatigue-rated load cells are designed explicitly for component durability and fatigue test machines where highly cyclical loading is present. These quality load cells resist extraneous bending and side-loading forces.

The table below outlines a load cell strain and safety factor comparison chart, which shows how Interface load cells, including our  1000 Fatigue-Rated Universal LowProfile® Load Cell and 1000 High Capacity Fatigue-Rated Universal LowProfile® Load Cell stack up against generic competitive load cells.

This table compares actual strain levels in Interface LowProfile Load Cells versus generic load cells. The safety factors are a means of visualizing the merit of the various designs. The value of fatigue-rated load cells for fatigue applications is evident from the safety factor data. It is also apparent that Interface load cells with 4 mV/V output have lower stress levels and, therefore, more fatigue resistance than other cells, even though their output is only 3 mV/V or less.

Lower Stress by User Limits

Note that the tests in the safety factor comparison are based on fully reversed load cycles. This type of loading cycle is considerably more stringent than unidirectional loading, which is the more common application of load cells. Suppose a fatigue load cell is repeatedly loaded in only one direction. In that case, the Goodman Law predicts that it can be loaded to about 133% of the bidirectional fatigue-rated capacity with no degradation of its fatigue rating. Conversely, unidirectional loading to a fatigue cell’s rated capacity is much less stressful on the cell than bidirectional. It can be expected to yield a fatigue life well beyond the number of cycles that could be reasonably and economically applied in a verification test program. For additional information on this topic, please refer to Interface’s Load Cell Field Guide under Fatigue Theory.

ADDITIONAL RESOURCES

Fatigue Testing with Interface Load Cells

Beam Stress Test

Force Measurement is Fundamental in Material Testing

Test and Measurement Solutions

LowProfile Load Cells 101

Stainless Steel Load Cells 101

Interface Column Load Cells

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A column load cell is a type of load cell designed with a cylindrical or column-shaped housing. It is typically used in applications where the load or force is applied vertically, and the sensor is installed in a way that the load is directed along the central axis of the column.

Interface column load cells are often used for vertical force measurement applications, including weighing scales, silos, structural tests, and thrust testing. Column load cells are rugged, providing a more durable solution for exposure to environmental conditions. Interface column load cells are typical for high-capacity thrust and structural testing.

A column load cell, by design, handles higher axial (vertical) loads while maintaining accuracy and reliability. Column load cells are designed for vertical force measurement. They are more robust, durable, and often larger than a standard canister load cell.

Canister load cells are typically more compact, making them a good choice for applications with limited space and where easy installation is a priority. A LowProfile “pancake style” load cell is compact and flat, with a lower height than column load cells. LowProfiles are the most popular Interface design of a load cell due to their versatility. The choice between using a column load cell, canister style load cell, or LowProfile depends on the specific needs of the application, capacity, environment, and dimensions.

Popular Interface Column Load Cells

Interface Column Load Cells are available in high capacities, in both tension and compression, as well as compression-only options.

2160 HIGH-CAPACITY COLUMN LOAD CELL

The Interface 2160 High Capacity Column Load Cell offers high performance and highly durable design. It is typically used in high-force measurement applications. It has capacities up to one million lbf (4450kN), with custom options to go higher.

  • Performance to ±0.15% FS
  • Standard capacities of 300K lbf to 1000K lbf (1334 kN to 4448 kN)
  • Screw-in Handles
  • Tension and compression measurement
  • Standardized output
  • ASTM E74 calibration
  • Special thread size
  • Dimensionally compact
  • Multiple bridge

SPECIAL NOTE: Why choose a tension and compression column load cell? It’s based on the use case. Weighing of objects that can be subjected to both tension and compression forces, such as aircraft and vehicles. Force measurement in applications where both tension and compression forces are present, such as cable tension testing and load-bearing applications

2161 HIGH-CAPACITY COLUMN COMPRESSION ONLY LOAD CELL

The Interface High Capacity Column Compression-Only Load Cell Model 2161 is applicable for high-capacity compression-only measurement applications. It is available in capacities from 300K to 1000K (1335 to 4450 kN). Options are available for a 2nd bridge.

  • Standard capacities of 300K lbf to 1000K lbf (1334 kN to 4448 kN)
  • Performance to ±0.15% FS
  • Compression-only
  • Standardized output
  • ASTM E74 calibration
  • Handles for easy movement and lifting
  • Accessories, including cables and mating connectors

2200 CALIBRATION COLUMN LOAD CELL

The Interface high accuracy 2200 Calibration Column Load Cell is a guided column design. It is lightweight and portable for use in the field. It measures tension and compression. Their high performance and capacity make them excellent for calibrating in aerospace, industrial, and manufacturing labs.

  • Capacities from 100K – 200K lbf (445kN – 889kN)
  • Performance to <0.10%FS
  • Quadruple the gages of the standard column cell
  • Lightweight and compact
  • Various models, including the 2230 and 2240, are available.
  • Compression-only available
  • Standardized output
  • ASTM E74 calibration
  • Special thread size

2300 HIGH CAPACITY FLANGE MOUNT COLUMN LOAD CELL

The Interface High Capacity Flange Mount Column Load Cell 2300 Series is a column design with a flange mount for easy installation. It is available in capacities of 630 kN (140K lbf), 1000 kN (225K lbf), and 2000 kN (450K lbf) and has options available for a 2nd bridge.

  • Accuracy class 0.05% FS
  • Tension and compression
  • Low profile and low mass
  • Fixed cable or plug connection
  • Flange mounted
  • Easy installation
  • Optional redundancy with a dual bridge for axial force measurement
  • Option for TEDS calibration IEEE 1451.4
  • Models 2330, 2340, and 2350 are available.

Column Load Cell Applications

Column load cells are a viable option for diverse applications across various industries, from rocket tests to construction monitoring equipment. Their ability to accurately measure force and withstand harsh environments makes them a valuable tool for ensuring safety, efficiency, and quality.

Aerospace: In the aerospace industry, column load cells measure the weight of aircraft during loading and unloading, ensuring proper weight distribution and safe flight operations. These rugged load cells are a common feature of thrust test stands.

Infrastructure: Many infrastructure projects rely on column load cells. They are embedded in structures, such as bridges, buildings, and equipment like cranes, to monitor load distribution and prevent overstress or collapse of critical infrastructure. For example, column load cells can test the axial load-bearing capacity of piles, ensuring the stability of foundations and structures.

Machinery and Storage: In agricultural and industrial use cases, column load cells monitor the weight of silos, tanks, and hoppers containing materials. By installing column load cells beneath these containers, you can continuously measure the weight of the contents for storage and process control, allowing operators to track material levels and prevent overfilling or underfilling, which can lead to production issues and safety concerns.

Weighing Systems: Column load cells are commonly used in industrial weighing systems, such as platform scales, floor scales, and truck scales. These load cells are placed under the platform on which the objects or materials are placed for weighing. A logistics warehouse installs column load cells within the floor scales for accurately measuring the weight of pallets or goods. This is valuable data for storage, inventory management, and shipping.

Construction: Material testing and quality control applications use column load cells to measure compressive forces. In a construction material test lab, these load cells can be integrated into testing machines to evaluate the compressive strength of concrete, bricks, or other construction materials.

Energy: Renewable energy use cases for column load cells include measuring the loads exerted on wind turbine towers, ensuring structural integrity, and preventing damage during high winds. Column load cell are also used in field testing for extraction equipment.

Is a column load cell right for your use case?  Contact our application engineers to explore your options.

Interface Engineered Solutions for Lifting Webinar Recap

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Everything from mechanical engineering designs, equipment materials, and the sensors used in lifting machinery is changing the concept of lifting today. Interface experts Keith Skidmore and Ken Bishop explore types of measurement products, applications, technical considerations, and tips for lifting use cases in the Interface recorded webinar Engineered Solutions for Lifting.

Sensors are central in lifting equipment to maintain safety, quality, compliance, and efficiency. Interface provides a useful product selection online resource for lifting applications. Go to the Lifting Solutions Guide.

Interface load cells can help prevent accidents by providing real-time feedback on the weight of the lifted load. The measurement data helps ensure the lifting machinery is not overloaded or unbalanced, leading to structural failure, tipping over, or injury. Sensor technologies improve quality control by ensuring products are lifted to the correct specifications.

Interface LowProfile Load Cells, Load Pins, Load Shackles, and Tension Links improve efficiency by automating the lifting process. For example, load cells can control the speed and movement of a lifting mechanism, ensuring that the load is lifted safely and efficiently. These measurement sensors can reduce costs by minimizing damage to equipment and products. By preventing overloads and ensuring that loads are lifted safely, load cell devices can extend the lifespan of equipment and prevent costly accidents.

In many industries, regulations require load cells for lifting applications to ensure compliance and overload protection. For example, the Occupational Safety and Health Administration (OSHA) requires the use of load cells in many lifting applications for monitoring and reporting.

Automation of lifting is on the rise. Using robotics and component activation is commonly designed into new equipment and retrofitting existing hardware. These features also provide valuable operating safety and alarm systems based on key measurements. Modernizing equipment to meet today’s and future use cases is important to operators and manufacturers of lifting equipment. This includes utilizing wireless components and using cloud-based data (IoT).

Lifting sensors are more commonly found in settings with high-temperature variances and exposure to extreme environmental conditions. The measurement solutions must withstand these variances while providing continuous monitoring capabilities. Today’s use cases require smaller load cells, like our beam load cells, while not sacrificing precision measurement.

Interface products are used for all types of lifting equipment, apparatus, and machines, including:

  • All Purpose Cranes
  • Patient Lifts and Medical Equipment
  • Drones with Lift and Carry Capabilities
  • Aircraft Lifts and Rigging
  • Lifting Gantry Systems and Mobile Gantry Cranes
  • Jib Cranes
  • Engine and Floor Cranes
  • Scaffold Runway Systems
  • Venue and Entertainment AV Equipment
  • Rigging Equipment
  • Pallet Movers
  • Elevators
  • Loaders and Bulldozers

During the webinar, Interface experts shared tips and best practices. Here is a quick summary of tips for lifting use cases.

Top Measurement Tips for Lifting Use Cases

TIP #1 Select the right force sensor. Factors to consider when selecting a force sensor include the maximum force it can measure, accuracy, weight, dimensions, and environmental conditions for use.

TIP #2 Proper installation will define your application’s success. It is important to install the force sensor correctly to ensure accurate measurements.

TIP #3 Calibrate the force sensor regularly, preferably once a year. Regularly run calibration-grade tests if the load cell is embedded into the lifting device.

TIP #4 Based on each use case, instrumentation can make all the difference in your program. For example, a data acquisition system collects force data to monitor the lifting process, identify potential problems, and generate reports.

TIP #5 Design the lifting system with safety in mind. Force measurement can improve the safety of lifting systems by preventing overloading, detecting imbalances in the load, and monitoring the condition of the lifting equipment.

Tune into the webinar to hear Keith Skidmore and Ken Bishop detail best practices, key considerations to identify stable and unstable lifting, and a thorough review of industry applications using Interface products.

Lifting Applications

Crane Capacity Verification

A customer wants to verify that their crane is strong enough to safely lift a heavy load at its rated maximum load capacity. A wireless solution is needed to avoid long cables and to have a faster installation time. Interface’s Model WTSATL Lightweight Wireless Tension Link Load Cell can measure the load’s maximum capacity. The WTS-RM1 Wireless Relay Output Receiver Modules can also trigger an alarm that can be set when the maximum capacity of weight/force has been reached. The data is transmitted and can be reviewed with the WTS-BS-1-HS Wireless Handheld Display or on the customer’s PC.

gantry crane lifting a heavy container

Gantry Crane Wireless Lifting for Heavy Containers

Gantry cranes are used for mobile and lifting applications in industrial and construction. A weighing system is needed to see if the gantry crane can lift heavy containers or loads, preventing crane failure or accidents. Interface’s WTSLP Wireless Stainless Steel Load Pins can be installed into the corners of the lifting mechanism of the gantry crane, where heavy-loaded containers are lifted and moved. The force results are then transmitted to the WTS-BS-1-HS Wireless Handheld Display for Single Transmitters and a connected computer using the WTS-BS-6 Wireless Telemetry Dongle Base Station.

Patient Lifting Device

In the medical field, sometimes it is necessary to weigh or transfer patients who are disabled and cannot walk. A Hoyer lift is used to move patients around. A manufacturer would like a force system to weigh disabled patients and see the maximum weight it can hold. Interface’s WTS 1200 Standard Precision LowProfile® Wireless Load Cell is attached to the top of the Hoyer lift. The force results are wirelessly transmitted to the medical laptop through the WTS-BS-6 Wireless Telemetry Dongle Base Station.

Find additional productions and solutions in our Lifting Solutions Overview.

Lifting Solutions Brochure

Universal Load Cells 101

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In the force measurement testing world, versatility has tremendous value. That is why some of Interface’s most popular products are designed to provide adaptability for a broad spectrum of testing and force monitoring processes.

These products are engineered for universal use cases, from standard tension and compression LowProfile Load Cells to Interface’s multi-axis sensors that can measure up to 6 axes for additional data.

Universal load cells can measure both tension and compression forces in testing and monitoring applications. Universal load cells provide the ability to capture data on both forces. They are designed for a broad scope of force or weight measurement applications such as weighing scales, material testing machines, and industrial automation equipment.

These load cells are ideal for installations where the load may change from tension to compression. Universal load cells also suit various product and material destructive testing as they are robust and easily mounted in various applications.

Top Benefits of Universal Load Cells

Range of Standard Capacities: Universal load cells are diverse in dimension and capacities. From miniatures like our model ULC, which is the world’s most accurate ultra-low capacity tension and compression load cell measuring loads from 0.1 to 2 N (10.2 grams to 500 gmf) to 1000 Series High Capacity Fatigue Rated LowProfile Load Cell capable of measuring tension and compression over a million pounds of force, Interface has a range of universal options. The requirements of any testing program will define the type of load cell.

Versatility: Universal load cells can measure force in multiple directions, including compression, tension, and shear forces.

Adaptable Accessories: Universal load cells can be used with various accessories and fixtures to suit specific applications. This includes bases, mounting hardware, adapters, cables and protective enclosures. Wireless sensor options are in high demand for universal load cells.

Engineered to Order: Interface offers engineered to order and customization of our load cells to further the application use and flexibility of use.

Products such as universal load cells appeal to highly regulated industries like aerospace, defense, automotive, and industrial automation. In controlled testing, engineers must meet stringent performance measurement standards for components, equipment, and machinery.

Another area in which universal load cells stand out is in material testing. Measuring tension and compression provides critical force data when testing a material that will be used in system that needs to be both strong and flexible for safety and quality purposes.

One of Interface’s most popular load cell model, the 1200 series, is universal. For example, Interface’s Model 1200 and 1201 Series IO-Link Universal Load Cells are pancake style load cells which are IO-Link compatible with an open standard serial communication protocol that allows for the bi-directional exchange of data from sensors and devices.  We also offer a 1200 and 1201 Series 3-Wire Amplified Universal Load Cell.

Features and benefits of the 1200 and 1201 Series IO-Link Universal Load Cell include:

  • Proprietary Interface strain gages
  • Temperature compensated
  • Eccentric load compensated
  • Low deflection
  • Shunt calibration
  • Tension and compression
  • Compact size
  • 3-wire internal amp choice of 4-20 mA, ±5V, ±10V, 0-5V, 0-10V

Patient Hoyer Lift

A Hoyer lift is used to move patients. A medical equipment manufacturer would like a force system to weigh disabled patients and measure the maximum force when using the equipment. Interface’s WTS 1200 Precision LowProfile Wireless Load Cell is attached to the top of the Hoyer lift. The tension and compression force results are wirelessly transmitted to the medical personal’s computer through the WTS-BS-6 Wireless Telemetry Dongle Base Station. Interface’s wireless force system was able to measure the amount of weight a patient while also clarifying the maximum capacity the Hoyer lift can hold during use. Read more about this application here.

If you need a little more flexibility in your testing and monitoring system, Interface universal load cells may be a great option for you.  The choice of a specific load cell will depend on factors such as the required load capacity, accuracy, environmental conditions, and signal compatibility with the rest of the measurement or control system.

ADDITIONAL RESOURCES

Interface 101 Series

Wireless Telemetry Systems 101

Load Cell Sensitivity 101

LowProfile Load Cells 101

ITCA Tension and Compression Load Cell

 

Interface Measurement Solutions Support Smart Cities

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Various Interface load cell products are used in the development of smart cities. What is a smart city? A smart city is a municipality that uses data and interconnectivity to improve sustainability and quality of life.

According to the Smart City Index of 2023, London is leading the way in the development of its smart city infrastructure. Other top contenders for the lead are Zurich, Oslo, Barcelona, Taiwan, Singapore and New York. There are estimates are there are more than 140 smart cities today in various stages, and the number is growing. They are also showing tremendous potential to transform the way we live, consume, move and work. Most smart city infrastructure is in the early and mid-stages of development.

From research to engineering and building to maintenance, Interface force measurement solutions are being actively used in the design and testing of components used in smart city projects and systems. Force measurement data is valuable for assessing and improving the overall efficiency and sustainability of a city. Learn more by visiting our smart cities solutions here.

Load cells can be used to measure a variety of parameters in smart city design, development of infrastructure and resource management.

  • Interface LowProfile and Mini Load Cells are used to measure the force applied to a structure or object. This information can be used to assess the structural integrity of a building or bridge, or to optimize the design of a new product used in the smart city infrastructure.
  • Interface torque transducers provide data on the rotational equivalent of force. This information can be used to monitor the performance of heavy duty machinery and construction equipment, or to ensure that products are assembled correctly when building.
  • Specialized load cell technologies, like load pins, load shackles and tension links can be used to measure tension, lifting actions and weight, which is the force of gravity acting on an object. This information can be used to weigh products, to monitor the loading of transport vehicles, or to ensure materials or people are not overloading lifting equipment. Go to our Lifting Solutions and Weighing Solutions to learn more about the range of products available for smart city applications.
  • Interface wireless and Bluetooth solutions support the advance ICT (communications) requirements to easily capture accurate data without the cable. Our complete line of wireless telemetry systems and Bluetooth options support the advancements in digital optimization and feedback required for real-time data management.

By using sensors, data, and communications to improve human conditions of our cities, we can create more livable, sustainable, and equitable communities for the future.

SmartInfrastructure_InfographicPoster

How Load Cells and Sensor Devices are Used in Smart Cities

Load cells are versatile and essential tools for a diverse range of smart city applications. They provide accurate and reliable measurements that can be used to improve safety, resource management, and sustainability. Here are some examples of how force measurement solutions are used in smart cities.

  • Improving traffic management: Data acquired from load cells and sensors can be used to monitor the weight of vehicles on bridges and roads. This information can be used to optimize traffic flow and to prevent overloading of infrastructure. Force measurement data can also be used to monitor the movement of people and vehicles. This information can be used to identify potential hazards and to prevent accidents. Read: Interface Powers Smart Transportation Solutions
  • Smart waste management: Force measurement outputs can be used to monitor the weight of waste in bins. This information can be used to optimize waste collection routes and to reduce the amount of waste that is sent to landfills. Learn more in our IoT Waste Management Container Weighing App Note
  • Structural health monitoring: The data from load cells, torque transducers and multi-axis sensors can be used to monitor the structural integrity of buildings and bridges. This information can be used to identify potential problems before they lead to failure. Check out our post Interface Solutions for Structural Testing.
  • Smart farming and agriculture: Data from force measurement solutions can be used to monitor the weight of crops and livestock. This information can be used to optimize irrigation, fertilization, and harvesting. Learn more in our post Solutions to Advance Agriculture Smart Farming and Equipment.
  • Smart transportation: Creating a system of public transportation options, electric vehicles and bicycles, along with autonomous deliveries are part of smart city development projects around the world. Interface force measurement devices are critical in the development, testing and management of smart transportation.
  • Air quality systems: Force measurement data collected in real-time can be used to monitor the emission of pollutants from vehicles and factories. This information can be used to reduce pollution and improve air quality in smart cities.
  • Resource and energy management: Measurement data is important in production and optimization of critical resources like renewable energy and water, as well as for reducing waste and improving efficiency. Force measurement data can be used to monitor the energy consumption of buildings and infrastructure. This information can be used to identify opportunities for energy savings.

Smart cities use various Interface sensors technologies and other data collection instrumentation devices to track the use of resources and transportation. Overall, force measurement solutions are a valuable tool for improving the efficiency, sustainability, and safety of smart cities. As the use of sensors and other data collection devices continues to grow, we can expect to see even more innovative applications for force measurement data in smart city applications.

Keep watch of our smart city applications, as we learn more about how our products are being used in very smart and innovative use cases.

ADDITIONAL RESOURCES

Modernizing Infrastructure with Interface Sensor Technologies

The Rise in Digital Force Measurement Solutions

Why Civil Engineers Prefer Interface Products

Interface Powers Smart Transportation Solutions

Smart Pallet Animated Application Note

Making Products Smarter with Interface OEM Solutions

Solutions to Advance Agriculture Smart Farming and Equipment

Interface Solutions for Heavy Equipment

Vertical Farming for Sustainable Food Production on Earth and Beyond

Innovative Interface Lifting Solutions

 

Load Cells for Smarter and More Efficient Weighing

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Interface load cells are a key part of the advancements in weighing technologies. Breakthrough applications utilizing force sensing for weighing are expanding across industries. No matter the use case, weighing and scales must be trustworthy and always provide accurate information, as outlined in Accuracy Matters for Weighing and Scales.

For decades, load cells have been used for a wide range of weighing use cases. Load cells are electromechanical transducers that convert a force into an electrical signal. This electrical signal can then be amplified and processed to determine the weight of the object being weighed.

In testing or standard weighing practices, the load cell is typically mounted in a frame that supports the object being weighed. The load cell is connected to a signal conditioner, which amplifies the electrical signal from the load cell and converts it into a digital signal. The digital signal is then sent to a weighing controller, which calculates the weight of the object and displays it on a display. The weighing controller may also have additional features, such as data logging, remote monitoring, and programmable functions.

Now, Interface high accuracy load cells are found in advanced weighing applications used to define center of gravity for equipment, control inventory through weighing automation, batching, check weighing, process control and sample testing. Learn more about these applications and products in our Weighing Your Options Webinar.

Smart cities use connected force sensing trash receptacles for optimizing schedules of waste removal based on weight to reduce costs and increase efficiencies.  Innovative smart pallet force sensing helps to track products and goods at the dock to reduce expenses and increase productivity using weight as the measurement. Silo weighing for inventory management uses setpoints that are configured to automatically generate purchase orders when product levels fall below a defined weight.

Weighing sensor technologies today are more than a standard measurement device. Interface load cells can measure across a wide range of force, from 0.02 to 2,000k lbf. As the types of applications mature in capabilities, innovation, and complexity, these requirements also help to define the type of sensors that will provide precision measurement.

Our weighing sensors combined with advanced instrumentation use a variety of communication methods, including analog, digital, wireless and cloud based, to allow users to gather data in-facility or remotely. We can customize sensors to meet specifications for weighing use cases, including the design of complete weighing systems.

Advanced weighing applications often require sealed sensors with submersible features, wireless output and communications capabilities, and ease of use to design into products, machines or equipment.

Digital scales with advanced features such as data logging, connectivity options, and programmable functions have become commonplace. From bench scales to platform scales, there is a diverse way for our load cells to be implemented and available to measure diverse types of weighing applications.

Popular Interface Products Used for Weighing Applications

Load cells are an essential part of many weighing applications. They are used to measure the weight of objects in a variety of industries, including manufacturing, food processing, and logistics. Load cells provide accurate and reliable measurements, which is essential for ensuring the quality and safety of products.

WeighingSolutions_InfographicPoster

Learn more in the application note details below.

Veterinary Weighing Scales

A manufacturer wanted two weighing scales for consumers like veterinarians who want to weigh large and small animals. Interface suggested using two different solutions. For the smaller scale, Interface’s SPI Low Capacity Platform Scale Load Cell was perfect for smaller, and lighter animals. As for the larger scale, the INFRD Platform Scale with pre-installed load beams worked best. Both scales included 480 Bidirectional Weight Indicators to display the total weight of the animals being weighed. Using this solution, the veterinarian was able to weigh both large and small pets easily and accurately with both scales.

Silo Grain Weighing and Dispensing

A customer wanted to measure and record the grain being put in and out of their grain dispensing container, as it dispenses content into a carrier truck for transportation. Interface suggested a wireless solution, installing a WTS 1200 Standard Precision LowProfile™ Wireless Load Cells at the legs of the grain dispensing container. The 1200 measured the distribution correlation of the grain as it inputted and outputted from the container. Results were transmitted and displayed using the WTS-BS-1-HA Handheld Display for multiple transmitters, and logged and graphed using the WTS-BS-4 USB Industrial Base Station. With this solution, the customer was able to log and graph the measurement results of the grain content that the silo dispenses into the grain dispensing container, and when the grain is dispensed into the carrier truck.

Weighing is among the oldest use cases for load cells in the world and Interface has been there nearly every step of the way, growing alongside our customers and developing new innovations to perfect accuracy, reliability and durability. To learn more about our sensor solutions for weighing application, please visit https://www.interfaceforce.com/solutions/weighing-solutions/.

What are IO-Link Load Cells

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Interface continues to see a growing demand for using different communication protocols within our force measurement sensors and instrumentation devices. One of these protocols is IO-Link, which is a standardized communication protocol that enables bidirectional communication between the control system and the connected devices. It is frequently used in the field of industrial automation and IoT.

IO-Link is designed to connect and communicate between sensors, actuators, and other industrial devices with a higher-level control system. It runs over a standard three-wire connection, typically using unshielded industrial cables, and supports point-to-point communication.

Industrial automation and IoT are fundamentally reliant on digital transformation. Industry 4.0 requires the exchange and communication of information between sensor and instrumentation. IO-Link supports this requirement, helping to keep machines and facilities using sensors under control while improving their efficiency and productivity.

IO-Link can be used with load cells in industrial applications to enable enhanced monitoring, control, and diagnostics. Interface now offers customization of our most popular load cells with IO-Link capabilities.

Why Use IO-Link in Test & Measurement

  1. IO-Link is compatible with a wide range of sensors, actuators, and other devices. It provides a standardized interface, allowing easy integration and interchangeability of devices within an automation system.
  2. Real-time monitoring, control, and diagnostics is especially important in test and measurement. IO-Link enables this type of data exchange between devices and the control systems supporting the transmission of measurement data.
  3. IO-Link supports both analog and digital devices, making it versatile for a range of applications.
  4. With IO-Link, devices can be connected using a single cable, reducing the complexity and cost of wiring and simplifying installation and maintenance.
  5. Health and maintenance are important in testing. IO-Link supplies advanced diagnostic capabilities, allowing devices to report their status, health, and detailed diagnostic information. This is valuable for maintenance, troubleshooting, and reducing downtime.

Interface 1200 and 1201 Load Cell IO-Link Features and Benefits

The 1200 and 1201 Series IO-Link Load Cell Universal or Compression-Only are LowProfile load cells that are IO-Link compatible.

  • Proprietary Interface temperature
  • Compensated strain gages
  • Eccentric load compensated
  • Low deflection
  • Shunt calibration
  • Tension and compression
  • Compact size
  • 3-wire internal amp choice of 4-20 mA, ±5V, ±10V, 0-5V, 0-10V
  • Options include Base (recommended), custom calibration, multiple bridge, special threads and dual diaphragm
  • Accessories include mating connector, mating cable, instrumentation and loading hardware

For a complete datasheet of this product, go to the 1200 and 1201 with IO-Link product page.

IO-Link integration with load cells enhances the functionality and flexibility of weight measurement systems by enabling seamless communication, remote evaluations and diagnostic capabilities. It contributes to more efficient and reliable industrial processes where precise monitoring is necessary.

Weight and force monitoring: By connecting load cells to an IO-Link-enabled system, such as a PLC or a weighing controller, real-time weight data can be transmitted and monitored. The load cells measure the weight or force applied to them, and this information can be instantly communicated to the control system via IO-Link. The control system can then perform tasks such as weight-based control, process optimization, or triggering specific actions based on weight thresholds.

Remote parameterization and calibration: IO-Link allows load cells to be remotely parameterized and calibrated from the control system. Instead of manually adjusting the load cell settings at the device level, the control system can send the necessary configuration commands through the IO-Link interface. This feature simplifies the setup process, saves time, and reduces the risk of errors during calibration.

Performance evaluation and detection: IO-Link provides diagnostic capabilities for load cells, enabling the detection of potential issues or abnormalities. The load cells can send diagnostic information, such as temperature, supply voltage, or fault codes, to the control system through IO-Link. This data can be utilized for predictive maintenance, troubleshooting, or alarming in case of malfunctions.

IO-Link enhances the functionality, flexibility, and efficiency of industrial automation systems by enabling intelligent communication between devices and the control system.

ADDITIONAL RESOURCES

Interface New Product Releases Summer 2023

Force Sensors Advance Industrial Automation

Interface Weighing Solutions and Complete Systems

Instrumentation Analog Versus Digital Outputs

 

Interface New Product Releases Summer 2023

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When the company started in 1968, the focus was on perfecting the precision load cell. This month we are celebrating our 55-year anniversary, and over these years we have expanded our line from the famous blue and miniature load cells to more than 35,000 products that include instrumentation, calibration systems, torque transducers, multi-axis sensors, load pins, shackles and accessories.

Interface has released several new products in our force measurement solutions line. This update is a highlight of these additions. If you have any questions about these new products, please contact our application engineers.

INTERFACE SUMMER 2023 NEW PRODUCT RELEASES

NEW PRODUCT! JB1100 4-CHANNEL ADVANCED SIGNAL CONDITIONING TRANSMITTER INDICATOR AND JUNCTION BOX

The JB1100 is the ideal solution for systems that require weight data from a load cell. Interface’s JB1100 4-Channel Advanced Signal Conditioning Transmitter Indicator and Junction Box offers maximum control. The multi-function weight transmitter junction box can be utilized as an independent or dependent four-channel instrument. The JB1100 allows for the direct reading and diagnosis of each individual connected load cell or summed as a whole.

Primary JB1100 features and benefits:

  • Four independent scales or four load cell inputs
  • LED display (13mm) and six LEDs show active functions
  • Configurable calibration and setup
  • Calibration using linearization points
  • Diagnostic information via serial port
  • Analog Output Standard Opto isolated, 16 bit 0-20 mA, 4-20 mA, 0-5 VDC, and 0-10 VDC
  • 12-24 VDC Power and comes with a 120VAC Power Supply as well

For more weighing instrumentation and information, visit our new Interface Weighing Solutions.

NEW PRODUCT! 4850 BATTERY POWERED BLUETOOTH WEIGHT INDICATOR

Interface’s 4850 Digital Indicator Instrumentation is environmentally protected and wireless using Bluetooth technology and battery power. The 4850 digital indicator is housed in a stainless steel NEMA 4X enclosure. It has a large 0.8” LCD display for easy readout of up to 50,000 display divisions and can drive up to 8-350Ω load cells. A full duplex RS-232 port or optional Bluetooth module can transmit data on demand or continuously to match the input requirements of a wide variety of peripheral devices including printers, remote displays and computers.

Primary 4850 features and benefits:

  • Stainless steel swivel stands and enclosure
  • Easy to read LCD display with up to 50,000 graduations
  • Full front panel configuration and calibration
  • Multipoint calibration linearization
  • Units lb, kg, g, and oz
  • Drives up to eight 350 ω load cells
  • Power requirements are 4-14 VDC with 6-volt 3 Ah internal rechargeable lead acid battery
  • High quality and low cost
  • Remote display, peak hold, check weighing, accumulation, self-diagnostics
  • Option: analog output: 16-bit, 0-5 VDC, 4-20 mA
  • Option: built-in relays (6V or 12V)

NEW PRODUCT! 1200 AND 1201 SERIES IO-LINK LOAD CELL UNIVERSAL OR COMPRESSION-ONLY

Interface now offers advanced communication protocol features for our most popular load cells, the 1200 LowProfile and 1201 LowProfile Series. Interface 1200 and 1201 Series IO-Link Load Cell Universal or Compression-Only models are low profile load cells that are IO-Link compatible, which is an open standard serial communication protocol that allows for the bi-directional exchange of data from sensors and devices. IO-Link features with Interface standard products are available by custom solutions request.

Primary 1200 and 1201 Series IO-Link Load Cell for Universal or Compression Only:

  • Proprietary Interface temperature compensated strain gages
  • Eccentric load compensated
  • Low deflection
  • Shunt calibration
  • Tension and compression
  • Compact size
  • 3-wire internal amp choice of 4-20 mA, ±5V, ±10V, 0-5V, 0-10V

Available options include bases, custom calibration, multiple bridges, special threads and dual diaphragm. Accessories available are mating connectors, mating cables, instrumentation and loading hardware.

NEW PRODUCT! A4200 AND A4600 SIGNAL CONDITIONING OPTIONS FOR 3-WIRE AMPLIFIED LOAD CELLS AND IO-LINK DIGITAL LOAD CELLS

The Interface A4600 WeighCheck™ Load Cells and A4200 WeighCheck Load Cells now have custom signal conditioning features, including IO-Link Digital and 3-Wire Amplified by custom request. The customized A4200 and A4600 3-Wire Amplified Load Cells provide an internally amplified low profile load cell with a voltage or mA signal. This option eliminates the need for an external signal conditioner and comes scaled to the load cell and ready to use. A4200 and A4600 IO-Link Digital Load Cells with an industry standard M12 connector. IO-Link, a communication protocol used in industrial automation applications to connect sensors and actuators to control systems, offers increased flexibility, enhanced diagnostics, simplified wiring, improved efficiency, and lower costs. Read more here.

Primary A4200 and A4600 WeighCheck™ 3-Wire Amplified and IO-Link Digital Load Cells features and benefits:

  • Standard A4200 and A4600 capacity ranges from 2.5K to 50K lbf (11.1 to 222 kN)
  • High output – 4 mV/V
  • Self-centering in all directions
  • High safe side load – to 400%
  • Standardized output – ±0.1%
  • Zinc plated (A4200) or stainless steel (A4600)
  • Signal conditioner options
  • IO-Link digital option with M12 connector
  • 3-Wire amplified with a voltage or mA signal

NEW PRODUCT! TORQUE COUPLINGS FOR INTERFACE T8, T11 AND T25 TRANSDUCER MODELS

When you are selecting any of the Interface T8, T11 or T25 Torque Transducers, it is highly recommended to get the couplings that are designed for those specific models. Generic couplings can create issues in accuracy and performance, such as denting the disks or overcoming the frictional locking.  There are multiple options for each transducer model in a range of capacities.  View all coupling options here.

Primary Torque Coupling Options:

  • Floating Mount Single Flex Couplings
  • Floating Mount Clamping Ring Single Flex Couplings
  • Floating Mount Shrink Disk Single Flex Couplings
  • Floating Mount Keyed Single Flex Couplings
  • Pedestal Mount Keyed Double Flex Couplings
  • Pedestal Mount Double Flex Pedestal Mount Couplings
  • Pedestal Mount Clamping Ring Double Flex Couplings
  • Pedestal Mount Shrink Disk Double Flex Couplings

NEW PRODUCT! BX6-BT-OEM PORTABLE 6-CHANNEL HIGH SPEED BLUETOOTH DATA LOGGER

Interface’s BX6-BT-OEM is a 6-channel measuring amplifier with Bluetooth connection and data logger functionality in the smallest dimensions. The BX6-BT-OEM has six measurement channels. The first channel is for full-bridge strain gages, channels 2-6 are individually configurable as voltage input (single-ended) or strain gage bridge input including half and quarter bridge configuration. Channel 7 for acquiring digital pulses is available for connecting incremental encoders or as an input for square-wave signals. The measurement data can be recorded on a micro-SD memory card for continuous recording up to 3000 readings per second, long recording intervals with power management and digital input triggered recording. The recorded files can also be downloaded via Bluetooth SPP. A real-time clock creates timestamps the measurement data files. Ideallythe BX6-BT-OEM is paired with Interface’s 6-Axis Multi-Axis Series.

Primary BX6-BT OEM features and benefits:

  • 6-channels plus one encoder channel
  • 6-Axis Multi-Axis Sensor compatible with internal matrix calculation
  • Data logger up to 3,000/s
  • Embedded Bluetooth with 400-meter range
  • Six strain gage inputs: full bridge, half bridge, and quarter bridge plus bridge completion (1K, 350, 120 ohm)
  • Five single ended voltage inputs 0-10 VDC
  • 16-bit resolution
  • mV/V, VDC, counter, frequency, RPM, and angle inputs
  • Internal charging circuit (500 mA)
  • BlueDAQ logging and graphing software included
  • Digital inputs and outputs (trigger/tare/setpoints)
  • data logging features long recording intervals and power management
  • Micro-controller with scripting language for creating embedded applications
  • Log to SD card and BlueDAQ software

ADDITIONAL PRODUCT RESOURCES

Do you need help in selecting the right products for your upcoming testing programs and projects? We are available to help you choose the best products based on your unique requirements. If you have questions about these new products, capacities, capabilities, or specifications, please contact our application engineers.

What is Moment Compensation?

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Moment compensation refers to a process of adjusting or counterbalancing the effects of an external force or torque, known as a moment, on a system or object. This is often done in engineering or physics contexts where precise control and stability are required, such as the design of force measurement applications.

Moment compensation is often used to prevent unwanted movements or deformations in systems, to ensure precision and accuracy in measurements, or to maintain stability and control during operation. Moment compensated load cells improve accuracy by compensating for the impact of external forces and moments on the measurement, allowing for more precise and reliable measurements.

Most load cells are sensitive to orientation and loading concentricity. When external forces or moments are introduced, measurement errors are more common and reduce the accuracy of the readings. These external forces or moments can come from various sources. Examples of external forces or moments that can affect the accuracy of load cells and require moment compensation:

  • Off-axis loading: When the load is applied off-center to the load cell, it creates a moment that can introduce errors in the measurement.
  • Temperature changes: Changes in temperature can cause thermal expansion or contraction of the load cell, which can introduce measurement errors.
  • Vibration: Vibrations from nearby equipment or processes can cause the load cell to vibrate, creating measurement errors.
  • Changes in orientation or position: Changes in the orientation or position of the load cell can cause gravitational forces or other external forces to act on the load cell, affecting the measurement.
  • Torque: When a load cell is subject to torque, such as twisting or bending forces, it can introduce measurement errors.
  • Wind or air currents: Air currents or wind can create external forces on the load cell that can affect the measurement

A load cell that is moment compensated can minimize or eliminate these errors, resulting in higher accuracy. Load cells with moment compensation can be more sensitive to slight changes in the load, as it can compensate for any external forces or moments that might affect the measurement.

Moment Compensation is an Interface Differentiator

Interface’s moment compensation process reduces force measurement errors due to eccentric loads by deliberately loading cell eccentrically, rotating load, monitoring and recording output signal, and then making internal adjustments to minimize errors. Every product we ship must pass moment compensation specifications and performance requirements. Every Interface LowProfile™ load cell is moment compensated to minimize sensitivity to extraneous loads, a differentiator from other load cell manufacturers.

When load cells are moment compensated, they can be used in a wider range of applications, including those with complex or dynamic loads, which might be difficult or impossible to measure accurately using a load cell without moment compensation. Interface’s LowProfile Load Cell models have the intrinsic capability of canceling moment loads because of its radial design. The radial flexure beams are precision machined to balance the on-axis loading.

Moment compensated load cells are designed to counteract the external forces or moments by using a configuration of strain gages and electronics that can detect and compensate for these forces. The strain gages are arranged in a way that allows the load cell to measure the force applied to it in multiple directions, and the electronics can then use this information to calculate the impact of external forces and moments on the measurement.

Interface uses eight gages, as opposed to the four used by many manufacturers, which helps to further minimize error from the loads not being perfectly aligned. Slight discrepancies between gage outputs are carefully measured and each load cell is adjusted to further reduce extraneous load sensitivity to meet exact specifications.

Moment compensation improves the stability of a load cell, particularly in situations where the load is off-center or subject to torque. This can prevent the load cell from shifting or becoming damaged, leading to more consistent and reliable measurements. It also improves the durability of a load cell, as it can help protect it from the impact of external forces or moments that might cause damage or wear over time.

ADDITIONAL RESOURCES

Addressing Off-Axis Loads and Temperature Sensitive Applications

Contributing Factors To Load Cell Accuracy

Off-Axis Loading 101

How Do Load Cells Work?

Load Cell 101 and What You Need to Know

Get an Inside Look at Interface&#8217;s Famously Blue Load Cells

Strain Gages 101