The **FRTD-R-K3-R** is a specific model within a series of temperature control components, typically associated with **Resistance Temperature Detectors (RTD)** and thermal monitoring systems. It is commonly used in industrial automation for precise temperature measurement. --- ### 1. Component Breakdown The part number can be categorized based on its technical specifications: | Feature | Description | | :--- | :--- | | **Type** | Resistance Temperature Detector (RTD) | | **Sensor Element** | Pt100 (Platinum resistance at 100 $\Omega$ at 0°C) | | **Configuration** | 3-Wire System (K3) | | **Class/Accuracy** | Typically Class A or Class B (per DIN IEC 751) | | **Termination** | Lead wire with specific insulation (often Teflon or Fiberglass) | --- ### 2. Key Technical Specifications Below are the typical electronic characteristics for this specific part series: * **Resistance Range:** 100 $\Omega$ at 0°C (standard Pt100 curve). * **Temperature Coefficient:** $\alpha$ = 0.003851 $^\circ$C⁻¹. * **Measurement Range:** -50°C to +250°C (standard range, varies by insulation). * **Wiring Type:** **3-Wire (K3)**. This configuration is used to compensate for the lead wire resistance, ensuring high accuracy over longer distances compared to 2-wire sensors. * **Response Time:** Rapid response due to the thin-film or small diameter probe construction. --- ### 3. Electronic Architecture (3-Wire System) The "K3" designation indicates a 3-wire bridge circuit. Here is how the electronic signals are handled: 1. **Lead 1 (Excitation):** Provides the constant current source. 2. **Lead 2 (Sense):** Measures the voltage drop across the RTD element. 3. **Lead 3 (Compensation):** Connected to one side of the element to allow the controller to calculate and subtract the resistance of the wires themselves. --- ### 4. Common Applications * **HVAC Systems:** Monitoring duct temperatures. * **Industrial Ovens:** Precise thermal regulation. * **Medical Equipment:** Temperature stability in laboratory incubators. * **Food Processing:** Monitoring storage and cooking temperatures. ---