39.1mm Square Force Sensor – Pressure Sensitive Resistor
39.1mm Square Shaped Force Sensor (FSR) – 0.1N to 20N Range
The 39.1mm square force sensor is a force-sensitive resistor (FSR) that changes resistance when pressure is applied. It’s ideal for detecting physical pressure, squeezing, and weight in human-machine interfaces, musical instruments, and robotics projects. With a large 39.1mm square active area, it provides reliable readings for various force ranges.
Key Specifications
| Specification | Value |
|---|---|
| Force Range | 0.1N to 20N |
| Resistance (No Load) | >10 MΩ |
| Resistance (Full Load) | <200 Ω |
| Active Area | 39.1mm x 39.1mm |
| Thickness | 0.45 mm |
| Operating Temperature | -30°C to +70°C |
What You Can Build With This
- Smart grip pressure monitor
- DIY electronic drum pad
- Robot tactile sensor
- Bed occupancy sensor
Compatibility
This force sensor works with any microcontroller that can read analog voltage, including Arduino Uno, Nano, Mega, and Raspberry Pi (with ADC). Use a 10kΩ pull-down resistor to create a voltage divider circuit. Operates at 3.3V or 5V.
Wiring Notes
Connect one pin to VCC, the other to an analog input pin with a 10kΩ resistor to GND to form a voltage divider. The output voltage increases with greater force. Avoid exceeding 20N to prevent sensor damage.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, it can be connected to an analog input using a voltage divider circuit with a 10kΩ resistor. It works with any Arduino board.
Can I measure weight with this sensor?
It can detect force up to 20N (approx. 2kg). For precise weight measurement, a load cell is recommended, but this sensor is great for force presence and relative pressure.
How do I calibrate the force sensor?
Calibration involves applying known forces and mapping the analog readings. Since FSRs are not precision devices, you'll need to calibrate for your specific application to get force in Newtons.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items