Flex Sensor

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  • Flex Sensor 2.2″
  • Angle Displacement Measurement
  • Bends and Flexes physically with motion device
  • Temperature Range: -35°C to 80°C
  • Flat Resistance: 25K Ohms ±30%
  • Bend Resistance: minimum 2 times greater than the flat resistance at 180° pinch bend
  • Power Rating : 0.5 Watts continuous; 1 Watt Peak


  • A simple flex sensor 2.2″ In length.
  • As the sensor is flexed, the resistance across the sensor increases. The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend).
  • Connector is 0.1″ Spaced and bread board friendly.
  • Note: please refrain from flexing or straining this sensor at the base. The usable range of the sensor can be flexed without a problem, but care should be taken to minimize flexing outside of the usable range. For best results, securely mount the base and bottom portion and only allow the actual flex sensor to flex.
  • Adjustable Buffer – a potentiometer can be added to the circuit to adjust the sensitivity range.
  • Variable Deflection Threshold Switch – an op amp is used and outputs either high or low depending on the voltage of the inverting input. In this way you can use the flex sensor as a switch without going through a microcontroller
  • Resistance to Voltage Converter – use the sensor as the input of a resistance to voltage converter using a dual sided supply op-amp. A negative reference voltage will give a positive output. Should be used in situations when you want output at a low degree of bending.

Possible Uses

  •  Robotics
  • Gaming (Virtual Motion)
  •  Medical Devices
  •  Computer Peripherals
  •  Musical Instruments
  •  Physical Therapy
  •  Simple Construction
  •  Low Profile


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