Flex Sensors are commonly used in Robotic Gloves and other Robotic Control application. It can be used to analyze how much a material is being bent. This flex sensor is 2.2” long and has two output leads which acts like a variable resistor. That is the resistance between two pins change based on how much the sensor is bent.  It is commonly used along with another resistor to build a voltage divider circuit and then obtain a variable voltage based on the change in resistance of the sensor.
FLEX Sensor Features and Specifications:
Operating  voltage: 0-5V
Power rating : 0.5Watt (continuous), 1 Watt (peak)
Operating temperature: -45ºC to +80ºC
Flat Resistance: 25K Ω
Resistance Tolerance: ±30%