Sensor: Flex

Flex sensors can be found in many places where users want to measure the impact of bending. Doctors and sports therapists use flex sensors to keep body posture straight in their patients. Flex sensors are used in bathroom scales to measure body weight. They are also used in fast, high impact applications to see the speed and force of an action because flex sensors can be made from different materials from metals, plastics, to paper. 

Game controller using flex sensor
Posture monitoring device
Wearable health tech device