The **FRTD-R-G1-R** is a specific model within the series of **Resistance Temperature Detectors (RTD)**, typically utilized in industrial automation for high-precision temperature sensing. These components are critical for feedback loops in PID controllers and PLC systems. --- ### 1. Technical Specifications Overview The model name typically breaks down into specific electronic and mechanical characteristics: | Feature | Specification | Description | |:---|:---|:---| | **Element Type** | Pt100 | Platinum resistor with 100 $\Omega$ at 0°C | | **Connection Type** | 3-Wire System | Compensates for lead wire resistance | | **Thread Size** | G1 (1 inch) | Parallel pipe thread (BSPP) | | **Material** | Stainless Steel | High corrosion resistance for the probe sheath | | **Output Type** | Resistance | Varies linearly with temperature change | --- ### 2. Core Electronic Components The device functions based on the principle of **Resistance vs. Temperature**. * **Platinum Sensing Element:** The "Pt100" element inside the tip has a positive temperature coefficient (PTC). As the temperature rises, the electrical resistance increases according to the Callendar-Van Dusen equation. * **Internal Wiring (3-Wire Configuration):** This part is crucial for accuracy. By using three wires instead of two, the electronic controller can measure the resistance of the lead wires and subtract it from the total measurement, ensuring the reading reflects only the temperature at the probe tip. * **Insulation:** High-purity Magnesium Oxide (MgO) is often used to insulate the internal wires from the stainless steel sheath, providing fast thermal response while maintaining electrical isolation. --- ### 3. Connection Diagram (General) To integrate this into an electronic circuit or PLC, follow the standard color-coding (typically IEC 60751): ```text Terminal A (White): Source/Excitation (+) Terminal B (Red): Return (-) Terminal C (Red): Compensation ``` --- ### 4. Key Application Use-Cases * **HVAC Systems:** Monitoring liquid temperatures in large scale piping. * **Food & Beverage:** Ensuring pasteurization temperatures are met. * **Chemical Processing:** Monitoring reactors where G1 threaded ports are standard. ---