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Load sensor

Load sensors are electromechanical transducers that translate force or weight into voltage. The ability to measure force or load is a vital part of many industrial processes. In automatically controlled systems, it is desirable to monitor the forces and moments being generated at the work site between the motive, or drive power element, and the driven element of the operating unit. Automobiles are equipped with seat belt devices and airbag devices as facilities for ensuring the safety of occupants. The amount of gas for deploying the airbag and the energy absorbing (EA) load of the seat belt are adjusted depending on the weight of the occupant. For this purpose, load sensors (load cells) are needed for measuring the weight of the occupant sitting on the seat. A load sensor for converting a force or a weight into an electrical signal is generally formed by attaching a plurality of strain gauges to a load-sensitive element. The change in voltage produces, in the read-out instrumentation, a repeatable deflection or indication that can be calibrated directly in terms of the load applied to the load transducer. A load sensor for air bag systems include a sensor comprising a sensor plate which is deflected depending on the received load and a strain gauge attached to the sensor plate, and a sensor comprising a elastic member which is deflected depending on the received load and an electrical capacitance sensor detecting the displacement of the elastic member.

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Load sensor product listings

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