Force Sensing Resistors (FSR) are made of a proprietary carbon-based piezoresistive ink, typically screen printed on polyester film (PET). As force is applied to the Force Sensing Resistor, the electrical resistance decreases. The FSR carbon ink formulation can be customized for application-specific requirements. There are two basic FSR configurations: the ShuntModeTM and the ThruModeTM. The main purpose of a pressure sensor (tactile force sensor), such as an FSR, is to measure the forces applied to a specific area and then relay that information via selected output or electronics.
Butler Technologies is an approved Licensee of Sensitronics, manufacturer of Force Sensing Resistors.
For more information on Force Sensing Resistors, click here.