0.3 inch Pressure Sensor FSR400 Force Sensitive Resistor A compact, thin force sensitive resistor that changes resistance in response to applied pressure. Designed for simple integration into prototype and production projects that need reliable touch or force detection in a very small sensing area. Key benefits Detects touch and pressure with a small footprint, allowing placement in tight or compact assemblies. Simple analog output behavior makes it easy to read with common data acquisition hardware and analog inputs. Flexible and lowprofile form enables mounting under soft surfaces or inside housings without adding bulk. Useful for rapid prototyping and product development where straightforward force sensing is required. Main features Function: Force sensitive resistor that reduces resistance as applied pressure increases, producing a variable analog signal. Sensing area: 0.3 inch diameter sensing region for concentrated pressure detection. Form factor: Thin and flexible sensor suitable for constrained spaces and curved surfaces. Performance: Smooth, continuous change in resistance across light touch to firmer presses for responsive input detection. Electrical interface: Works with simple voltage divider or pullup circuits and analogtodigital inputs for direct measurement. Compatibility and integration Compatible with microcontrollers, development boards, data acquisition modules, and general purpose analog inputs when used with a suitable resistor network or signal conditioning. Can be read with common ADC circuits or interfaced to external signal conditioning for specific measurement ranges. Mounting and connection require basic wiring; no specialized drivers are . Practical applications Human machine interface: Use as a compact touch or press sensor for custom control panels, wearable input pads, or handheld devices where space is limited. Robotics and automation: Detect contact, grasp pressure, or presence of light touch on end effectors and grippers in smallscale robots. Product prototyping: Add simple pressuresensitive input to prototypes such as musical triggers, pressure mats for small objects, or interactive prototypes that respond to touch. Quick integration tips Use a pullup resistor to create a voltage divider and read the output with an analog input. Calibrate insystem to map resistance or voltage to the force range relevant to the application, since response is nonlinear. Protect sensing area from sharp objects and excessive abrasion for longer lifespan. The 0.3 inch Pressure Sensor FSR400 Force Sensitive Resistor offers a compact, easy to use solution for detecting touch and variable pressure in small spaces, suitable for prototyping and embedded applications that require a simple analog force sensing element.