The **FRTD-R-GWA-P** is a specific industrial-grade **Resistance Temperature Detector (RTD)** assembly, typically utilized in plastic extrusion, molding, and thermal processing applications. It is designed for precision temperature measurement in high-pressure or high-vibration environments. --- ### 1. Component Breakdown The part number indicates several key electronic and physical characteristics: | Feature | Description | | :--- | :--- | | **RTD Type** | Usually a Platinum (Pt) thin-film element, most commonly **Pt100** or **Pt1000**. | | **Accuracy Class** | Typically follows IEC 751 Class A or B standards. | | **Configuration** | Likely a 2-wire, 3-wire, or 4-wire setup (3-wire is the industry standard for lead-wire compensation). | | **Housing (GWA)** | Glass-filled or armored protective casing, often referring to a specific swivel-nut or bayonet adapter style for mounting. | | **P (Plug/Connection)** | Indicates a specialized plug-in connector or polarized termination for quick disconnection. | --- ### 2. Core Electronic Specifications These sensors work on the principle of the **Positive Temperature Coefficient (PTC)**, where the electrical resistance of the metal (Platinum) increases as the temperature rises. * **Resistance at 0°C:** 100 Ohms (for Pt100). * **Temperature Coefficient (Alpha):** 0.00385 $\Omega/\Omega/°C$. * **Insulation Resistance:** Usually $>100 M\Omega$ at 500V DC. * **Response Time:** Fast thermal response due to the "FRTD" (Fast/Flexible RTD) design. --- ### 3. Connection Diagram (Standard 3-Wire) Most FRTD units use a 3-wire bridge configuration to cancel out the resistance of the lead wires: ```text [ Sensor Element ] | +-------(Red) Line A | +-------(White) Line B (Compensation) | +-------(White) Line B' (Common) ``` --- ### 4. Application Areas * **Injection Molding:** Monitoring nozzle and barrel temperatures. * **Packaging:** Heat-sealing bars and shrink-wrap tunnels. * **HVAC/Industrial:** Air and liquid temperature monitoring where quick-disconnect (the "P" plug) is required for maintenance.