The **WSBS-15BC-R/Q** is a high-performance **water sensor/flow meter assembly** typically used in appliances (like dishwashers or washing machines) and industrial fluid management systems. It is designed to measure the volume of water entering a system and often includes integrated sensing for pressure or temperature depending on the specific sub-variation. --- ### 1. Technical Specifications The device operates on a Hall Effect principle to convert mechanical turbine rotation into electrical pulses. | Component | Specification | | :--- | :--- | | **Sensing Method** | Hall Effect Sensor | | **Operating Voltage** | 4.5V to 24V DC | | **Flow Range** | Typically 0.5 to 15 Liters/Minute | | **Output Signal** | Square Wave (NPN Open Collector) | | **Material** | Food-grade PPS / PA66 (Polyamide) | | **Connector Type** | RAST 2.5 or custom wire harness | --- ### 2. Key Electronic Components The assembly consists of several critical electronic and electromechanical parts: * **Hall Effect IC:** This is the "brain" of the sensor. It detects the magnetic field from the internal turbine's magnet as it spins. Each rotation triggers a voltage pulse. * **Internal Magnet:** A small permanent magnet embedded within the turbine rotor. * **Pull-up Resistor (Optional):** Many versions require or include a pull-up resistor (usually 4.7kΩ to 10kΩ) between the signal wire and VCC to ensure a clean high/low digital signal. * **EMI/EMC Protection:** Often includes small capacitors to filter electrical noise, ensuring the pulse count is accurate even near electric motors. --- ### 3. Pinout and Connection Most **WSBS** series sensors use a 3-wire configuration: | Pin | Color (Typical) | Function | | :--- | :--- | :--- | | **VCC** | Red | Power Supply (+) | | **GND** | Black | Ground (-) | | **OUT** | Yellow/White | Pulse Signal (Square Wave) | --- ### 4. Working Mechanism 1. **Fluid Entry:** Water flows through the inlet, pushing the internal turbine. 2. **Rotation:** The turbine spins at a speed proportional to the water velocity. 3. **Signal Generation:** As the magnet passes the Hall Effect IC, the sensor toggles the output pin. 4. **Data Processing:** The external controller (MCU) counts these pulses. By multiplying the pulses by the "K-Factor" (pulses per liter), the controller calculates the exact volume of water. ---