What is the difference between a force transducer and a load cell?

Force transducers and load cells are based on the same measuring principle – the strain gauge – and convert mechanical forces into electrical signals. The term load cell is predominantly used in weighing and process engineering, while force transducers cover the broader spectrum of force and torque measurement technology: from test benches in the aerospace industry to materials testing. interfaceforce® eK distributes both types in measuring ranges from 0,5 Newtons to 30 Meganewtons.

What types of force transducers does interfaceforce® eK offer?

The portfolio includes low-profile force transducers, S-shaped force transducers, miniature force transducers, measuring bolts, force rings, bending beam load cells, cylindrical high-load sensors, and multi-component transducers for up to 6 degrees of freedom (6DoF). All standard models are strain gauge based and supplied with a calibration certificate. Custom designs are developed according to customer specifications.

Which torque transducers are suitable for rotating applications?

For rotating shafts, torque measuring shafts (e.g., T2, T4, T6, T8, T11, T22, T25) are available, which operate without contact and without slip rings. The measuring ranges extend up to 10 kN·m. For static or reactive applications – such as in test benches or for measuring bolt preload – reaction torque transducers are used. Both variants provide strain gauge-based signals and are compatible with the measuring amplifiers from interfaceforce® eK.

How does the XSENSOR pressure distribution system work and what is it used for?

XSENSOR systems measure surface pressure distribution using ultra-flexible sensor mats in various geometries and resolutions. These imaging systems deliver precise, reproducible results and are used in automotive and medical technology, biomechanics, and point-of-sale applications – for example, for seat pressure analysis, tire contact patch measurement, mattress diagnostics, and wiper testing. The XSENSOR laboratory is accredited according to ISO/IEC 17025 (A2LA).

What measurement accuracy do the force transducers from interfaceforce® eK achieve?

The low-profile force transducers of the Interface series (e.g., 1200, 1201, 3200) typically achieve a total static error band of ≤ 0,02% of the nominal value (full-scale output). The Gold Standard® and Platinum Standard® reference force transducers are suitable for calibration tasks according to ISO 376 Class 0,5. All sensors are supplied with a calibration certificate; A2LA-accredited certificates according to ISO/IEC 17025 are available upon request.

Does interfaceforce® eK also perform calibrations of third-party sensors?

Yes. The calibration laboratory of interfaceforce® eK is ISO/IEC 17025 accredited (A2LA and DAkkS mutually recognized within the framework of the ILAC MRA) and calibrates force measuring devices regardless of the manufacturer. Supported standards: ISO 376, DKD-R 3-3, ASTM E74, VDI/VDE 2624, and custom calibration procedures. Force measuring ranges: 0,5 N to 250 kN (tension and compression). An RMA number will be issued in advance for submissions; the delivery address for calibrations and repairs is c/o SETFLEX, Oppelner Str. 23, 41199 Mönchengladbach, Germany.

How does a calibration process work and how long does it take?

The process begins with an inquiry via contact form or email; interfaceforce® eK promptly issues an RMA number. Upon receipt of the device, calibration is performed in an ISO 17025-accredited laboratory using static tensile and/or compressive force measurements with traceable transfer standards (DAkkS, NIST, or PTB). Calibrations according to ISO 376 or DKD-R 3-3 include multiple load stages in various mounting positions. Turnaround times are short – precise details are available upon request. The completed calibration certificate is internationally recognized.

Which force transducers are suitable for use in ATEX or explosion-hazardous areas?

For hazardous areas (ATEX/IECEx), interfaceforce® eK offers force transducers from the 3400 series as well as hermetically sealed sensor variants made of stainless steel. These models are designed for harsh and potentially explosive environments and deliver reliable measurement results even under continuous operation. For specific hazardous area requirements (Zone 1, Zone 2, etc.), we recommend individual consultation, as suitability depends on the respective device category and the medium being used.

From what quantity are special solutions and customer-specific force transducers available?

Custom designs are available even for single units. interfaceforce® eK develops customer-specific force transducers, torque transducers, and multi-component sensors based on over 25 years of experience and in-house strain gauge manufacturing. Rapid engineering and rapid prototyping enable solutions to be implemented in short lead times – from concept to series production. Application areas range from niche markets with small production runs to OEM integrations in high-volume series.

What distinguishes interfaceforce® eK from other providers in force measurement technology?

interfaceforce® eK has been the exclusive distributor in Germany for Interface Inc. (founded in 1968, Scottsdale, USA) since 1999 – one of the world's leading manufacturers of precision strain gauge-based force transducers. The service portfolio combines American manufacturing quality with local support: an ISO 17025-accredited calibration laboratory in Germany (A2LA/DAkkS, ILAC MRA), manufacturer-independent calibrations and repairs, custom manufacturing starting from a single unit, and exclusive distribution of XSENSOR pressure distribution systems. Measuring ranges from 0,5 Newtons to 30 Meganewtons cover virtually every industrial force measurement application.

What output signal do the force transducers provide, and what measuring amplifier do I need?

Strain gauge-based force transducers deliver a bridge signal of typically 2 mV/V or 4 mV/V at rated load. Further processing requires a measuring amplifier that converts this signal into a usable format – e.g., 0–10 V, 4–20 mA, USB, IO-Link, or digital interfaces. interfaceforce® eK offers suitable measuring amplifiers as complete measurement chains: from simple digital displays (IFFDA93, IFFDA5) and 8-channel data acquisition systems (IFFBX8) to wireless telemetry systems (WTS). Sensors with a TEDS chip also enable automatic parameterization at the measuring amplifier.

What protection ratings (IP classes) are available for the force transducers?

Most standard models are designed for industrial use and achieve protection ratings of IP65 to IP67 (dustproof, protected against water jets and temporary immersion). Hermetically sealed versions made of stainless steel achieve IP68 and are suitable for underwater, cleaning, and outdoor applications under harsh conditions. Certified versions are available for use in potentially explosive atmospheres (ATEX/IECEx). The exact IP rating can be found in each product data sheet; interfaceforce® eK is available upon request to advise on application-specific selection.

How often should a force transducer be recalibrated?

There are no legally mandated intervals; however, ISO 9001, IATF 16949, and industry-standard quality assurance systems recommend annual verification. In practice, the interval depends on the intensity of use, environmental conditions, and the required measurement uncertainty. In safety-critical applications or after mechanical overload events, immediate recalibration is recommended. The interfaceforce laboratory performs manufacturer-independent recalibrations with short turnaround times – even for sensors from other manufacturers.

What is TEDS and what advantages does it offer?

TEDS (Transducer Electronic Data Sheet, IEEE 1451.4) is an electronic data storage device integrated into the sensor or connector that automatically transmits calibration data and sensor characteristics to the measuring amplifier. This eliminates manual input and parameterization errors when replacing sensors – the measurement setup is ready for operation via plug-and-play. The IFFDA93 handheld device and other measuring amplifiers from interfaceforce® eK support the TEDS standard and enable quick, error-free commissioning, even with frequent sensor replacements.

What are parasitic forces and how do they affect measurement?

Parasitic forces are unwanted shear forces, bending moments, or torsional loads that act on the sensor simultaneously with the actual measuring force and can distort the result. Even an angular deviation of 5° in the load application causes a systematic error. To minimize parasitic influences, interfaceforce® eK recommends using rod ends, pressure load buttons, and mounting plates – all available as accessories. The interfaceforce® eK team provides support for sensor selection and installation advice upon request.

What are the delivery times and can I order small quantities?

Standard models from Interface Inc. that are in stock are available for immediate delivery. Custom designs and customer-specific receivers are manufactured upon receipt of order; thanks to rapid prototyping, initial samples are often available within a few weeks. There is no minimum order quantity – orders are possible starting from a single unit. Inquiries and orders can be made via email (info@interfaceforce.de), telephone (+49 8022 271667), or the contact form on the website.

Sensor integration for household and commercial appliances

The Equipment industry It encompasses a broad product range, traditionally divided into several subcategories. White goods include refrigerators, washing machines, and dishwashers. Small household appliances include air fryers, induction cooktops, and blenders. Commercial kitchen equipment includes professional catering equipment and cleaning systems.

Over the past 75 years, major appliances have evolved from a post-war luxury consumer product to networked, highly regulated standards for both home and commercial use. The global market for household and commercial appliances is valued at $900 billion and is projected to exceed $1 trillion within a few years. What is driving this growth?

The appliance industry is moving away from purely mechanical designs and towards networked, sensor-controlled systems.

Consumers and commercial operators today expect devices to optimize resource consumption, automate complex programs, and deliver consistent performance over many years. Meeting these performance requirements necessitates extensive testing and measurement throughout the entire product lifecycle. Development engineers rely on load cells , torque transducers , and multi-axis sensors as early as the initial proof of concept . Laboratory engineers conduct verification tests, transducers are used in the production line and assembly for process optimization, and manufacturers integrate feedback systems.

Sensor-based kitchen and cooking appliances

Modern cooking and preparation appliances often integrate force and torque measurement to automate cooking programs, increase user safety, and protect mechanical drives.

Intelligent induction cookers and hobs use miniaturized pressure-force transducers under the cooking zones to detect the placement of pots, track boiling liquids by weight and automatically regulate the power levels.
High-performance mixers, commercial dough kneading machines and food processors goals Reaction torque sensors to motor mounts to monitor the resistance of the ingredients, prevent motor damage and adjust the speed to the density of the batch.
Automatic espresso machines and smart beverage dispensers integrate load cells under drip trays and storage containers to measure fill levels in real time for precise portion control.
Refrigeration units and storage modules use MB miniature bending beam load cells in drawer slides and shelves to record inventory and weights in real time.

Measurement technology for laundry and floor care systems

Washing machines, robotic vacuum cleaners and household appliances operate under high stress and require continuous mechanical balancing.

Front-loading and top-loading washing machines They use force sensors in the suspension geometry to calculate the amount of laundry and to automatically dose the amount of water and detergent before the program starts.
Drum support struts goals Multi-axis force sensors during high-speed spin phases to detect rotational imbalance and trigger engine adjustments that prevent severe vibrations and mechanical wear.
Robotic vacuum cleaners and motorized floor cleaners use Miniature force sensors in wheel assemblies and brush rollers to detect floor transitions, measure contact pressure and detect roller blockages.
DryerLint screens and filter assemblies use differential force measurements to warn users when a restricted airflow is causing safety or efficiency risks.

Structural reliability, safety interlocks and logistics tests

Components must withstand repeated user interactions, harsh transport conditions, and rigorous regulatory safety testing before they can be released to the market.

Oven doors, dishwasher locks and refrigerator seals undergo automated cycle tests with SM-S type load cells and Tension-compression load cells, to check the sealing pressure, tightness and release forces of the locks.
Tempered glass shelves, storage boxes and oven racks The refrigerator undergoes static and continuous load tests to confirm the permissible load capacity and prevent catastrophic failure in case of overload.
Sanitary systems Interface force transducers are used in drop testers, shaker tables and transport simulators to assess how compressors, pipe connections and electronics withstand packaging and transport stresses.
Commercial waste compactors and intelligent waste management systems use force measuring bolt and Bending beam sensors, to detect the fill level, prevent mechanical overloads and trigger compaction cycles.

Collaboration with device manufacturers, customer-specific sensors and complete systems

Developing a new device platform from concept to series production often requires specialized hardware configurations that cannot be covered by standard catalog parts. Interface works directly with device manufacturers and Tier 1 suppliers to develop customized solutions for individual installation spaces.

Custom OEM sensor housings allow development teams to embed ultraminiaturized load cells directly into internal mechanical linkages, motor mounts, and structural hinges without altering the external product dimensions.

Mass production benefits from application-specific calibration, custom-made cable assemblies and tailored mounting geometries designed for efficient line assembly.

Complete measurement systems combine multi-axis force and torque transducers with high-speed digital instrumentation, multi-channel data acquisition modules, and wireless telemetry. This enables turnkey test bench setups that can be directly synchronized with engineering software for rapid data validation.

Why Interface supports innovations in the device sector

From ultra-compact kitchen appliances to heavy-duty commercial laundry systems, equipment reliability depends on mechanical integrity and sensor accuracy. Interface delivers standard and custom-engineered measurement tools with the fatigue strength, overload protection, and high-frequency response required for demanding development cycles.

By combining comprehensive sensor technology with direct development collaboration, Interface empowers device manufacturers worldwide to design safer hardware, optimize resource efficiency, and deliver reliable performance to every consumer.