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Force Sensor Kit: Sensor, Resistor, Capacitors; Up to 25 lbs US$24.99

Force Sensor Kit: Sensor, Resistor, Capacitors; Up to 25 lbs

The Tekscan FlexiForce A201-25 is a piezoresistive force sensor capable of measuring up to 25 lbs of force, perpendicular to its sensing plane. In an electrical circuit, this sensor will act as a variable resistor where the change in resistance is inversely proportional to the force applied. The change in resistance can be measured by a simple RC decay circuit, readable by a microcontroller.

Two capacitors and a resistor are included. This will allow you to demonstrate the resistive nature of the sensor with a resistor/capacitor discharge time measurement circuit; no correlations to weight are made. The resistance of the FlexiForce sensor is proportional to weight. The sensor included in the kit has a resolution of about 1.6 lbs. The active sensing area is a .375" diameter circle at the end of the sensor. The conductive leads are easy to connect to a breadboard or through-hole area.

The FlexiForce has an ideal output for A/D conversion; 0V is no force and 4.2V is 25 lbs. In a BASIC Stamp system, the RCTIME command may be used with a LOOKUP table or calibration formula to execute some math to make the output useful.

Force Sensor Kit Features

  • Contains FlexiForce Sensor, 220 Ω resistor, 0.1 F capcitor, and 0.01 F capacitor
  • Measure both static and dynamic forces
  • Simple RC circuit interface
  • Capable of measuring a total applied force of 25 lbs
  • Requires at least 1 PSI on sensing area
  • Versatile small size
  • Ultra-thin, flexible printed circuit
  • Compatible with all Parallax microcontrollers
  • Power requirement: 5V DC
  • Communication: Variable resistance inversely proportional to applied force
  • Sensing area diameter: 0.375 inches (9.53 mm)
  • Dimensions: 8.00 0.55 0.008 inches (203 9.53 0.208 mm)
  • Operating temperature: 15 to 140 F (-9 to +60 C)

Download FlexiForce User Manual and BASIC Stamp 2 Code

This product was added to our catalog on Tuesday 05 June, 2012.


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