The **TCS-05-R/Q** typically refers to a high-precision **Conductivity and Temperature Sensor** often used in industrial water treatment, laboratory analysis, and environmental monitoring. Below is an overview of its electronic components, technical specifications, and wiring structure. --- ### 1. Key Electronic Components The device integrates several sensitive electronic subsystems to ensure accurate measurement: | Component | Function | | :--- | :--- | | **Platinum (Pt) Electrode** | The sensing element that contacts the liquid to measure electrical conductivity. | | **NTC Thermistor/Pt1000** | An internal temperature sensor used for Automatic Temperature Compensation (ATC). | | **Signal Conditioner** | Converts the raw analog micro-currents from the electrodes into a stable voltage or current. | | **Oscillator Circuit** | Generates an AC excitation signal to prevent electrode polarization (which occurs with DC). | | **Isolation Barrier** | Protects the output signal from electromagnetic interference (EMI) and ground loops. | --- ### 2. Technical Specifications The "R/Q" suffix usually denotes specific output types or mounting configurations (e.g., RS485 or Analog). * **Measurement Range:** Typically 0–2000 µS/cm or 0–20 mS/cm (depending on cell constant). * **Cell Constant (K):** Usually **K=1.0** or **K=0.1** for pure water. * **Output Signal:** * **R:** Often signifies **RS485 (Modbus RTU)** digital output. * **Q:** Often signifies **4-20mA** or **0-5V** analog output. * **Power Supply:** Generally 12V - 24V DC. * **Pressure Rating:** Up to 0.6 MPa (standard). --- ### 3. Wiring and Connectivity The sensor typically uses a multi-core shielded cable to prevent signal degradation. #### Digital Version (RS485) ```json { "Red": "VCC (12-24V)", "Black": "GND", "Yellow/White": "RS485-A", "Blue/Green": "RS485-B" } ``` #### Analog Version (4-20mA) ```markdown 1. Pin 1: Power + 2. Pin 2: Power - 3. Pin 3: Conductivity Signal Out (+) 4. Pin 4: Temperature Signal Out (+) ``` --- ### 4. Operating Principle 1. **Excitation:** The electronic circuit applies a high-frequency AC voltage to the electrodes. 2. **Ion Detection:** The ions in the solution carry the charge between the electrodes; the more ions, the higher the current. 3. **Compensation:** Because conductivity changes with temperature, the internal CPU uses the temperature sensor data to normalize the reading to **25°C**. 4. **Conversion:** The final value is digitized (RS485) or converted to a linear current (4-20mA) for the PLC or Controller. ---