SparkFun
Force Sensitive Resistor - Small
A compact force sensitive resistor (FSR) from Interlink Electronics with a 4 mm (0.16″) diameter active sensing area. The resistance changes based on applied...
A compact force sensitive resistor (FSR) from Interlink Electronics with a 4 mm (0.16″) diameter active sensing area. The resistance changes based on applied pressure — from over 1 MΩ with no pressure down to approximately 2.5 kΩ at full force — making it easy to detect touch, squeeze, and weight in your projects.
The two pins have standard 0.1″ pitch spacing, so the sensor plugs directly into a breadboard for quick prototyping. While not precise enough for accurate weight measurement, FSRs are excellent for detecting the presence and relative intensity of pressure.
Key Features
- 4 mm Active Area – Compact circular sensing surface
- Variable Resistance – >1 MΩ (no pressure) to ~2.5 kΩ (full pressure)
- Breadboard Friendly – 0.1″ pitch pins for easy prototyping
- Simple Interface – Works as a variable resistor in a voltage divider circuit
Specifications
- Sensing Area – 4 mm (0.16″) diameter
- Resistance Range – >1 MΩ (no force) to ~2.5 kΩ (full force)
- Pin Pitch – 0.1″ (2.54 mm)
- Manufacturer – Interlink Electronics
Ideal For
- Touch and squeeze detection in interactive projects
- Pressure-sensitive triggers and inputs
- Wearable electronics and soft robotics
- Arduino and microcontroller sensor projects
Jargon buster
Plain-language definitions for the technical terms used above.
- FSR
- Full-scale range is the span between the lowest and highest output a converter can produce. Error specifications given as a percentage of FSR depend on the selected output range, such as 2.5 V or 5 V.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
Find this product in
Brands
Sensors & Input
FSR400 Datasheet
Datasheet · 695.5 KB · Click any page to view full size
FSR Integration Guide
User Guide · 963.8 KB · Click any page to view full size
Force Sensing Resistor Integration Guide
User Guide · 963.8 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 445.2 KB · Click any page to view full size
Related Tutorials
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