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Compression load cell cuts force sensing price barrier for OEMs

29 July 2011

Variohm EuroSensor has introduced a packaged compression load cell from Measurement Specialities (MEAS) that combines MEMs strain gauge sensor technology with high volume manufacturing techniques to enable low-cost force sensing for a whole new class of 'smart' consumer appliance, business equipment and medical product applications.

Available  in four standard load ranges from 0 – 44N to 0 – 444N, the FX1901 has a compact 'coin cell' package of less than 30mm diameter with a button style concentrator tip and anti rotational mounting. With a typical 5Vdc excitation voltage, the load cell has a ratiometric span of 20 mV/V, a zero force output of +/- 15 mV and an accuracy of just 1% of span.

The numerous usage possibilities for the cost competitive device includes appliance payload and balance monitoring for domestic washers and dryers, power and user weight indication for chiropractic and exercise equipment, load feedback for patient hoists and physical therapy devices,  hand tool force output, and many more applications where force sensing may have been considered cost-excessive to include in the past.
The FX1901 employs MEAS' specially developed Microfused piezoresisitive strain gauge technology which has been well tried and tested in demanding applications such as aerospace. The process fuses the micro-machined strain gauge with high temperature glass and a stainless steel force measuring flexure. Eliminating the age-sensitive organic epoxies used in traditional load cell designs, the technology provides exceptional long term span and zero stability, low noise, high over-range, high reliability and essentially unlimited cycle life.

Variohm's wide range includes sensor and transducer solutions for the measurement of linear and angular position, vibration, force & torque, pressure and temperature for demanding applications throughout industry, agriculture, construction, autosports, and research.

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