FlexiForce A201 Force Sensor

FlexiForce A201 Sensor

Most popular standard sensor that meets the requirements of most customers. 

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FlexiForce® A201 Sensor

A201 sensors are trimmable and have a 3-pin male connector. We highly recommend you use A201 sensors with our Quickstart Board (pictured below), a finished single voltage source circuit, if you are not using your own electronics or multimeter.

The sensors are available in three force ranges: Low 4.4 N (0 - 1 lb), Medium 111 N (0 - 25 lb) and High 445 N (0 - 100 lb)*. The force ranges stated are approximations. The dynamic range of this force sensor can be modified by changing the drive voltage and adjusting the resistance of the feedback resistor. 

How to Adjust the Force Range:

*In order to measure forces above 100 lb (up to 1000 lb), apply a lower drive voltage (-0.5 V,-0.10 V, etc.) and reduce the resistance of the feedback resistor (1kΩ min.) Conversely, the sensitivity can be increased for measurement of lower forces by increasing the drive voltage or resistance of the feedback resistor.

Recommended CircuitRecommended Circuit Quickstart BoardQuickstart Board

For an alternative to the recommended circuit, try our FlexiForce®Quickstart Board. This is a finished single voltage source circuit which can be quickly dropped into a prototype or easily designed into a product to obtain force measurements.

Typical Performance 

Linearity (Error):  < ±3% (Line drawn from 0 to 50% load)

Repeatability:  < ±2.5% of Full Scale (Conditioned Sensor, 80% of Full Force Applied)

Hysteresis:  < 4.5 % of Full Scale (Conditioned Sensor, 80% of Full Force Applied)

Drift:  <5% / logarithmic time (Constant Load of 25lb (111 N))

Response Time:  < 5 µsec (Time required for the sensor to respond to an input force; Impact load - recorded on Oscilloscope)

Operating Temperature:  -40°C - 60°C (-40°F - 140°F)*

* Force reading change per degree of temperature change = 0.36%/ºC (±0.2%/ºF)



Force Sensor Length: 
7.50 in
6.00 in
4.00 in
2.00 in
Sensing Size (Diameter): 
0.375 in
Standard Force: 
1 lbs
25 lbs
100 lbs
1,000 lbs
Temperature Range (Low): 
-40 F
Temperature Range (High): 
140 F

Most popular standard sensor, can be trimmed