Standard Force Sensing Resistor

FA400 Sensor

High-Reliability Flexible Tactile Force Sensor

Standard off-the-shelf single-point piezoresistive sensor designed for human-touch HMI, squeeze force measurement, and micro-switch replacement.

Active Area

Ø5.70 mm

Force Range

50 g – 5 kg / 100 g – 10 kg / 200 g – 20 kg (selectable)

Outer Dimensions

44.00 × 7.60 mm

Operating Temp

−20°C to +60°C

Engineering Specifications

Complete Technical Specifications for FA400

Full mechanical, electrical, and environmental characteristics verified by factory quality inspection.

Model Identifier	FA400 Short-Tail Round FSR
Product Architecture	Standard Single-Point FSR (Round)
Active Sensing Geometry	Ø5.70 mm
Overall Physical Dimensions	44.00 × 7.60 mm
Dynamic Force Sensitivity	50 g – 5 kg / 100 g – 10 kg / 200 g – 20 kg (selectable)
Stand-Off Resistance (Unloaded)	> 1 MΩ
Rise Time Response	< 1 ms
Hysteresis & Repeatability	≤ 5% of full scale
Operating Temperature Range	−20°C to +60°C
Electrical Termination	Short Solder Pins (Direct PCB Solder)

Hardware Integration

Standard analog conditioning topologies for converting variable resistance into calibrated microcontroller inputs.

Connect FA400 in series with a 10 kΩ pull-down resistor to an ADC pin. Simplest approach for touch detection and threshold triggering.

Place FA400 in the feedback path of an inverting op-amp. Output voltage scales directly linear with force.

Our engineering team provides standard evaluation samples, 2D/3D integration layouts, and 24-hour technical consultation.