FlexiForce A101 Sensor

FlexiForce A101 Sensor

Smallest sensor ideal for integrating into OEM applications.

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FlexiForce™ A101 Sensor

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The A101 is our smallest sensor optimized for high volume manufacturing and ideal for embedding into products. The 2-pin sensors are currently our smallest standard sensor.

The sensors can measure up to 10 lbs.* The dynamic range of this mini force sensor can be modified by changing the drive voltage and adjusting the resistance of the feedback resistor (see below in "How to Adjust the Force Range").

A101 Force Resistance Conductance Chart

  • Sensor acceptance criteria ±40% of nominal
  • Sensor resistance measured 20 seconds after applied load
  • Sensor loaded through a polycarbonate puck equal to 68% (0.0123 in2) of total active area
  • Sensor was not attached to any drive circuitry

How to Adjust the Force Range:

*In order to measure higher forces, apply a lower drive voltage (-0.5 V, -0.25 V, etc.) and reduce the resistance of the feedback resistor (1kΩ min.) To measure lower forces, apply a higher drive voltage and increase the resistance of the feedback resistor.

A101 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 25 lb (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)††

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: 
0.62 in
Sensing Size (Diameter/Width): 
0.150 in
Standard Force: 
4 lbs
10 lbs
Temperature Range (Low): 
-40 F
Temperature Range (High): 
140 F

Smallest sensor ideal for integrating into OEM applications.