Description
The Interlink FSR402 is a single-zone Force Sensing Resistor optimized for human touch control applications. It consists of a robust polymer thick film (PTF) construction with a 0.5″ (12.7mm) diameter active area. When force is applied to the sensing surface, the resistance decreases—the harder the press, the lower the resistance . This makes it ideal for detecting relative force (light touch vs. hard press) in applications such as robotic grippers, touch-sensitive interfaces, and interactive installations.
The sensor is a two-wire passive device with no polarity—the two tabs are interchangeable. At rest (no force), resistance is greater than 1MΩ. Under light pressure, it drops to approximately 100KΩ, and at maximum rated force it can fall to around 200Ω . The FSR402 is rated for 10 million actuations at 1kg, 4Hz, with less than 10% average resistance change . It is ultra-thin (0.46mm) and flexible, allowing integration into tight spaces and curved surfaces .
Critical limitations: The FSR402 is not a load cell or strain gauge. It is not suitable for precise weight measurement—the resistance-force relationship is non-linear, and part-to-part repeatability is approximately ±15% to ±25% . For accurate measurements, calibration against known forces is required. The sensor tabs are heat-sensitive—direct soldering risks melting the plastic substrate; use a breadboard, clamp connector, or terminal block instead .
Features
-
Force-Sensitive Resistance: Resistance decreases as applied force increases; simple voltage divider interface.
-
0.5″ (12.7mm) Active Area: Compact circular sensing zone for fingertip or small-object pressure detection .
-
Ultra-Thin Construction (0.46mm): Flexible and low-profile for embedded and wearable applications .
-
High Durability: Tested to 10 million actuations with <10% resistance change .
-
Wide Force Range: Sensitivity from 0.2N to 20N (approximately 20g to 2kg) .
-
Fast Response Time: Approximately 3µs .
-
Two-Wire Passive Interface: No polarity; no power supply required for the sensing element.
-
Adhesive Backing: Peel-and-stick mounting for easy installation .
Technical Specifications
| Parameter | Specification |
|---|---|
| Active Area | 0.5″ (12.7mm) diameter |
| Thickness | 0.46mm |
| Force Range | 0.2N – 20N |
| Non-Actuated Resistance | >1MΩ |
| Resistance at Light Pressure | ~100KΩ |
| Minimum Resistance | ~200Ω (at max force) |
| Response Time | ~3µs |
| Durability | 10 million actuations |
| Part-to-Part Repeatability | ±15% to ±25% |
Reviews
There are no reviews yet.