The **FLM-2F-R/Q** is a high-precision, low-profile **Planar Force Sensor** manufactured by Interface Inc. It is primarily used in applications requiring thin-form factors and multi-axis force measurement. --- ### 1. Technical Specifications Below is a summary of the core electronic and physical parameters: | Parameter | Specification | | :--- | :--- | | **Capacity** | 100N to 500N (Varies by specific sub-model) | | **Output Sensitivity** | 1.0 mV/V to 2.0 mV/V (Nominal) | | **Excitation Voltage** | 5V to 10V DC (Recommended) | | **Bridge Resistance** | 350 Ohms (Standard Wheatstone Bridge) | | **Non-Linearity** | ±0.5% of Full Scale | | **Operating Temp** | -10°C to +60°C | | **Material** | Aluminum or Stainless Steel Alloy | --- ### 2. Electronic Architecture The FLM-2F-R/Q operates on standard strain gauge principles but is optimized for "Planar" or "Through-hole" mounting. #### A. The Wheatstone Bridge The internal circuitry consists of a **Full Wheatstone Bridge**. When a force is applied to the sensing element: 1. The strain gauges undergo mechanical deformation. 2. The electrical resistance of the gauges changes proportionally to the strain. 3. This change creates a differential voltage output measured in Millivolts per Volt (mV/V). #### B. Wiring Configuration The device typically uses a 4-wire color-coded system: * **Red:** Excitation (+) * **Black:** Excitation (-) * **Green:** Signal (+) * **White:** Signal (-) --- ### 3. Key Electronic Features * **Low Profile (Planar) Design:** The "2F" designation refers to its dual-axis or specific planar geometry, allowing it to be integrated into tight spaces like joystick bases, touch panels, or robotic grippers. * **High Impedance:** The 350-ohm bridge ensures compatibility with most industrial strain gauge amplifiers and data acquisition (DAQ) systems. * **Minimal Hysteresis:** Designed with high-quality foil strain gauges to ensure the sensor returns to zero voltage accurately after the load is removed. --- ### 4. Application Integration To use the FLM-2F-R/Q in an electronic circuit, you generally require: 1. **Signal Conditioner/Amplifier:** To boost the mV signal to a 0-5V, 0-10V, or 4-20mA signal. 2. **Analog-to-Digital Converter (ADC):** For processing the force data via a microcontroller (e.g., Arduino, ESP32, or PLC). ---