Based on the part number **FRTD-R-KB-L**, this component belongs to a specialized category of **Resistance Temperature Detectors (RTDs)**, typically used in industrial automation and HVAC systems. Below is a breakdown of the electronic specifications and characteristics associated with this part. ### 1. Component Overview The FRTD series is generally characterized as a **Flexible Resistance Temperature Detector**. It is designed to measure surface temperatures or fluid temperatures where a standard rigid probe cannot fit. --- ### 2. Technical Specifications The following table highlights the typical electronic and physical parameters for this specific configuration: | Feature | Specification | Description | | :--- | :--- | :--- | | **Element Type** | Pt100 / Pt1000 | Platinum-based resistor with 100 or 1000 $\Omega$ at 0°C. | | **Material** | Ribbon / Flexible Film | Allows for bending around curved surfaces (pipes/ducts). | | **Tolerance Class** | Class A or B | Standardized accuracy per IEC 60751. | | **Wiring Config** | 2-wire or 3-wire | 3-wire is common to compensate for lead resistance. | | **Lead Insulation** | Kapton or Teflon | High dielectric strength and thermal stability. | --- ### 3. Part Number Breakdown (Deciphering the Suffixes) While manufacturer codes vary slightly, the suffixes generally indicate the following: * **FRTD:** Flexible Resistance Temperature Detector. * **-R:** Refers to the **Ribbon** or Rectangular style of the sensing element. * **-KB:** Often indicates a specific **Kelvin/Bridge** wiring configuration or a specific Leadwire material (e.g., Kapton/Braided). * **-L:** Usually denotes the **Lead length** (specified in inches or millimeters). --- ### 4. Electronic Principle of Operation The device operates on the principle of **Predictable Resistance Change**: 1. **Linearity:** As the temperature increases, the resistance of the Platinum element increases linearly. 2. **Excitation:** A small constant current (typically $1mA$) is passed through the element. 3. **Output:** The voltage drop across the resistor is measured and converted into a temperature reading by a PLC or temperature controller using the equation: $$R_t = R_0(1 + At + Bt^2)$$ --- ### 5. Applications * **Battery Pack Monitoring:** Placing the flexible sensor between cells. * **Motor Windings:** Monitoring internal heat in electrical motors. * **Aerospace:** Measuring skin temperature on curved fuselage sections. * **Medical Equipment:** Precise heating block control.