Based on the technical designation **FRTD-R-JC-K/Q**, this part refers to a specialized **Resistance Temperature Detector (RTD)** probe assembly, typically used in industrial automation and precision thermal monitoring. The nomenclature breaks down into several critical electronic and physical components: ### 1. Technical Specifications Table | Component | Description | Specification | | :--- | :--- | :--- | | **Sensor Type** | Platinum Resistance (Pt100/Pt1000) | Standard DIN IEC 751 | | **Wiring Configuration** | 3-Wire or 4-Wire System | Eliminates lead wire resistance error | | **Temperature Range** | Industrial Grade | -50°C to +250°C (typical) | | **Accuracy Class** | Class A or Class B | ±(0.15 + 0.002*t) °C | | **Housing Material** | Stainless Steel (SUS304/316) | High corrosion resistance | --- ### 2. Breakdown of the Part Number * **FRTD:** Flexible/Fixed Resistance Temperature Detector. * **R:** Indicates a **Round** or **Rigid** probe shape, often referring to the protective sheath housing the internal element. * **JC:** Junction Connector. This signifies that the sensor uses a specific connector type (often a M12 or similar military-grade plug) rather than loose wires, ensuring a secure electronic signal path. * **K/Q:** These are tolerance and material suffixes. * **K:** Often represents a specific lead wire insulation (e.g., Kapton or Kalrez) or a specific calibration curve. * **Q:** Generally denotes **Quick-connect** or a specific **Quality certification** (such as high-vibration resistance). --- ### 3. Internal Electronic Components 1. **The Sensing Element:** A thin-film platinum resistor deposited on a ceramic substrate. Its resistance increases linearly with temperature ($100 \Omega$ at $0^\circ C$ for Pt100). 2. **Internal Lead Wires:** Usually silver-plated copper or nickel wires to ensure minimal signal degradation. 3. **Insulation Powder:** Compacted Magnesium Oxide (MgO) is used inside the sheath to provide high thermal conductivity while electrically isolating the sensor from the metal tube. 4. **Signal Interface:** The "JC" portion contains the pins and contact points that bridge the sensor to the PLC (Programmable Logic Controller) or temperature transmitter. --- ### 4. Typical Applications * **Semiconductor Manufacturing:** Precise temperature control in etching or deposition chambers. * **Food & Beverage:** Monitoring pasteurization or cooling lines. * **HVAC/R:** High-precision air or fluid flow temperature monitoring.