FlexiForce A201

FlexiForce A201 Sensor

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

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FlexiForce™ A201 Sensor

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A201 sensors are trimmable and have a 3-pin male connector. 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 small, versatile 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 1,000 lb), apply a lower drive voltage (-0.5 V,-0.25 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. For an alternative to the recommended circuit, see the Related Electronics tab.

A201 circuit diagram

Typical Performance

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

Repeatability: < ±2.5% (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)††

Acceptance Criteria: ±40% sensor-to-sensor variation

All data above was collected utilizing an Op Amp Circuit. If your application cannot allow an Op Amp Circuit, consult the FlexiForce Integration Guide, or contact a FlexiForce Applications Engineer.

††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/Width): 
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