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How Do Universal Testing Machines Use Load Cells?

Universal testing machines (UTMs) are essential for material qualification, structural research, and quality assurance. Interface load cells sit directly in series with the moving crosshead and the upper specimen grip of a UTM. A machine controller reads the load cell continuously within a closed feedback loop to regulate crosshead travel, maintain constant loading rates, or hold targeted force thresholds during stress relaxation evaluations. The transducer measures the specimen resistance as it deforms. The data acquisition system pairs this instantaneous force data with displacement data to measure elasticity, yield point, and ultimate tensile strength.

Addressing Technical FAQs in Torque Measurement

Interface answers advanced technical questions related to torque transducers and torque measurement. Explore the top 17 FAQs related to technicalities of torque measurement covering reaction vs rotary transducers, capacity selection, mounting alignments, couplings, calibration and metrology.
Data Sheet 101

Interface Data Sheet 101

Interface Data Sheet 101 reviews what to expect from our technical product data sheets. Consider data sheets as a technical roadmap of mechanical and electrical performance information. Interface data sheets include features, a reference image, performance specs, and drawings. The characteristics defined on a product data sheet are used to distinguish successful validation from a system failure by highlighting the individual model's specifications, dimensions, diagrams, characteristics, connectors, and wiring, when applicable.
Bridge Completion 1

Bridge Completion Considerations

Interface's use of the Wheatstone bridge is considered world-class in load cell design and for its ability to produce accurate measurements. Selecting the right instrumentation and ensuring proper bridge completion are technical necessities for maintaining the integrity of your force measurement data. Our bridge completion solutions simplify selecting the right instrumentation device to pair with your sensor, making it easier than ever to achieve high-quality measurements.
Force Versus Pressure

Distinctions of Measuring Force Versus Pressure

Interface strain gage load cells are the most reliable and accurate sensor for measuring force, as it's specifically designed to capture the total mechanical load. In contrast, a pressure sensor is designed to measure force distributed over a known area. While it is possible to design a load cell to measure pressure like Interface's IPCD, load cells are commonly used because they are specifically engineered and calibrated to measure total force accurately. Attempting to measure force with a standard pressure sensor is problematic because its output depends on both the force and the area over which it's applied. If the force distribution changes, the sensor's reading will change even if the total force remains constant. This makes a pressure sensor an unreliable tool for measuring the total force applied by a solid object.
Strain Gage Interconnection

Strain Gage Interconnection to Bridge Configurations for Load Cells

Interface strain gages are fundamental to load cell technology. In forming quarter, half, or full bridges, the interconnection of strain gages in a Wheatstone bridge is a critical design choice that impacts performance, cost, and application suitability. Interface details this technical topic to answer key questions about load cell design and strain gages.
INTERFACE TECH TALK ZERO BALANCE

Why Is Load Cell Zero Balance Important to Accuracy?

Several factors go into the accuracy and consistent performance of a load cell. These factors include non-linearity, hysteresis, repeatability,…
INTERFACE TECH TALK SEB

What is Static Error Band Output?

Interface Tech Talk answers the question of what is static error band output. SEB is a band encompassing all points on the ascending and descending curves centered on the best-fit straight line. It is expressed in units of %FS. SEB Output at capacity is based on the best fit straight line. Learn how to calculate SEB, the benefits, and an engineering perspective on why SEB output is preferred over terminal output.
DEMYSTIFYING SPECIFICATIONS RECAP

Demystifying Specifications Webinar Recap

Interface's Demystifying Specifications recorded webinar details product specification basics, key values, terms to know, how to read a datasheet, what specs matter most in force measurement, and commonly asked questions. For Interface, specifications are detailed descriptions that outline the characteristics, features, and qualities of our products, systems, or services. Throughout the webinar, Interface experts provide tips on what to consider for high-speed, durability, precision and speciality load cell, torque transducer, multi-axis sensor and instrumentation product requirements.