The **FRTD-R-A10-R** is a specific model within the series of **Resistance Temperature Detectors (RTDs)**, typically used for high-precision temperature sensing in industrial applications. Below is a detailed breakdown of its electronic components and specifications. --- ## 1. Core Technical Specifications The "FRTD" series generally refers to thin-film platinum sensors. Here are the primary characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Element Type** | Pt100 / Pt1000 | Platinum-based resistor | | **Resistance at 0°C** | 100 $\Omega$ (Standard) | Base resistance value | | **Tolerance Class** | Class A | High accuracy ($\pm 0.15 + 0.002|t|$) | | **Temperature Range** | -50°C to +400°C | Typical operating window | | **Dimensions** | 2.0mm x 10mm (approx) | "A10" refers to the physical size/format | | **Configuration** | SMD / Radial Lead | Designed for PCB or probe integration | --- ## 2. Electronic Composition The device is composed of three primary electronic layers: ### A. Ceramic Substrate The base is a high-purity **Alumina (Al2O3)** ceramic. This material provides excellent electrical insulation and high thermal conductivity, ensuring the sensor reacts quickly to temperature changes. ### B. Thin-Film Platinum Layer A microscopic layer of Platinum (Pt) is deposited onto the substrate using **sputtering technology**. * **The Meander Pattern:** The platinum is etched into a "snake-like" pattern to achieve the specific resistance (e.g., 100 ohms). * **Linearity:** Platinum is chosen because its electrical resistance increases linearly with temperature ($R_t = R_0(1 + At + Bt^2)$). ### C. Glass Passivation The platinum film is covered with a thin layer of glass. This protects the delicate electronic circuit from: * Oxidation * Moisture and humidity * Mechanical abrasion --- ## 3. Terminal Connection (The "R" Suffix) In many electronic component naming conventions, the trailing "R" indicates the connection type: * **Radial Leads:** Two or three wires protruding from one side for through-hole mounting. * **Materials:** Usually Nickel wires coated with Gold or Silver to ensure low contact resistance and ease of soldering. --- ## 4. Application Circuitry To use the FRTD-R-A10-R in an electronic system, it is typically integrated into one of the following: 1. **Wheatstone Bridge:** To convert the small change in resistance into a measurable voltage. 2. **Constant Current Source:** Applying a small current (typically <1mA to avoid self-heating) and measuring the voltage drop ($V = I \times R$). 3. **ADC Interface:** Connecting to a 24-bit Analog-to-Digital Converter for high-resolution digital temperature readings. ---