Ohmite: Force Sense Resistors’ Performance Can’t be Matched

15 Apr Ohmite: Force Sense Resistors’ Performance Can’t be Matched

Ohmite power resistors FSR series

This new product extension to the FSR Series provides three new sizes and multiple tail lengths to the force sensing resistor. The options have been expanded for design engineers, providing three different terminal connections as well.

Following the popular standard versions of the FSR series, Ohmite is introducing this new product extension. All FSR series parts are very durable, accepting 10 million actuations with minimal resistance change.

Performance That Cannot Be Matched

There are 3 different mechanisms in effect in an FSR sensor which together form the force resistance characteristics. Each of these mechanisms add together and merge to create the total response curve of a typical FSR. These mechanisms have different dependencies on sensor construction, mechanical integration and the electrical properties of the ink.

Break Force: This is the force required for the 2 membrane layers to contact. In this region the resistance is infinite until enough force is applied to make contact.

Area Effect: In this region the size of the contact area between the two layers is increasing with increasing force and thereby reducing the resistance.

Surface Effect: In this region as the force is increased the contact of the two ink surfaces increases at a microscopic level.

More Info

We are honored to serve as a manufacturer’s rep for Ohmite. Ohmite has been the leading provider of resistive products for high current, high voltage, and high energy applications for over 80 years.

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