FlexiForce Tekscan A502 Sensor

The Flexi Force A502 sensors are designed as the largest sensor optimized for high volume manufacturing. These sensors are perfect for embedding into different products. A502 sensors are square sensors, with a sensing area measuring 50.8 mm x 50.8 mm. This ultra-thin and flexible piezoresistive force sensor is available off-the-shelf in a variety of lengths for easy proof of concept. The A502 can be used with our test & measurement, prototyping, and embedding electronics, including the OEM Development Kit, FlexiForce Quickstart Board, and the ELF™ System*, ideal for prototyping and integrating into OEM applications.

This Flexi Force Tekscan A502 Sensor is based on a flexible printed circuit, that can be easily integrated into most applications. Due to its paper-thin construction, flexibility, and force measurement ability, it is capable of measuring the force between almost any two surfaces and is durable enough to stand up to most environments. FlexiForce offers better force sensing properties, linearity, hysteresis, drift, and temperature sensitivity than any other thin-film force sensor. It can measure up to a force range of  0-222 N (0-50 lb) range, specified with Tekscan electronics.

Moreover, this model is linear through a much lower range of 0-22 N (0-5 lb). And is capable of measuring loads up to 44,482 N (10,000 lb). By reducing the drive voltage VT  and adjusting the resistance of the feedback resistor RF, the dynamic range of this force sensor can be extended. Conversely, by increasing VT or RF the sensitivity can be increased.  In order to measure higher forces, highly recommended to apply a lower drive voltage (-0.5 V, -0.25 V, etc.). And thereby reducing the resistance of the feedback resistor (1kΩ min.). Whereas to measure lower forces, a higher drive voltage is applied and increase the resistance of the feedback resistor.