ESS102 FlexiForce™ Piezoresistive Force Sensor Tekscan ESS102 FlexiForce™ Piezoresistive Force Sensor is ideal for high temperature and humidity conditions. Made from Tekscan’s Enhanced Stability Series (ESS) pressure-sensitive ink, ESS102 allows better performance in a broader range of operating and storage conditions. The thin and flexible ESS102 can measure up to 44N (10lbs.). The force range can be extended by reducing the drive voltage (VT) or the resistance value of the feedback resistor (RF). Conversely, the sensitivity can be increased for measuring lower forces by increasing VT or RF.