Pololu Force-Sensing Resistor 1.5" Square FSR

Pololu 1.5" Square FSR Sensor

This Pololu force-sensing resistor is a passive variable resistor that decreases resistance as applied force increases. It is designed for hobbyists and engineers adding a touch interface to electronic projects or building robots that require basic tactile feedback. The sensor uses polymer thick film technology optimised for human touch control. It is not suitable for precision force measurements.

Sensing area 1.56" × 1.56" handles 0.2 N to 20 N

The active sensing area measures 1.56 inches by 1.56 inches and detects applied force ranging from a few dozen grams up to a few kilograms, equivalent to 0.2 N to 20 N. Force accuracy ranges from 5% to 25%, providing adequate resolution for simple touch detection but insufficient precision for quantitative weighing or metrology tasks. The sensor runs out of headroom beyond the 20 N upper limit.

Thin 0.02" flexible form factor

The device is extremely thin at 0.02 inches and weighs 1.2 g, allowing it to conform to curved surfaces without adding bulk. A masked adhesive backing enables easy mounting directly onto enclosures or panels. Flexible leads measuring 1.7 inches with 0.1 inch solder tab spacing ensure straightforward connection to standard solderless breadboards and perfboards. The passive component draws no power and generates no heat or noise during operation.