The model code **FRTD-R-DZ-L/Q** typically refers to a specialized **Thin Film Platinum Resistance Temperature Detector (RTD)** sensor element, often produced by manufacturers specializing in precision thermal components (like Hayashi Denko or similar industrial suppliers). Below is a breakdown of the electronic specifications and characteristics associated with this specific part series. --- ### 1. Part Number Breakdown (Functional Logic) | Component | Meaning | Description | | :--- | :--- | :--- | | **FRTD** | Film RTD | Indicates a thin-film platinum sensor on a ceramic substrate. | | **R** | Resistance Type | Typically denotes the specific resistance curve or physical form factor. | | **DZ** | Dimensions | Refers to the physical size (usually small/sub-miniature). | | **L** | Lead Wire | Indicates the presence of extended lead wires. | | **Q** | Quality/Class | Often denotes Class B or a specific accuracy tolerance (IEC 751). | --- ### 2. Technical Specifications These sensors are designed for high-precision temperature measurement across industrial and medical applications. | Feature | Specification (Typical) | | :--- | :--- | | **Base Resistance** | 100 $\Omega$ at 0°C (Pt100) or 1000 $\Omega$ (Pt1000) | | **Temperature Coefficient** | 3850 ppm/K (Standard DIN/IEC 751) | | **Temperature Range** | -50°C to +400°C (Standard range for thin-film) | | **Accuracy Class** | Class B ($\pm$0.3°C at 0°C) | | **Response Time** | High speed due to low thermal mass (Thin film technology) | | **Self-Heating** | < 0.3 K/mW (Dependent on airflow/mounting) | --- ### 3. Structural Composition The FRTD series utilizes a multi-layer construction to ensure stability and durability: 1. **Ceramic Substrate:** A high-purity alumina base that provides mechanical strength. 2. **Platinum Layer:** A thin film of platinum sputtered onto the ceramic, trimmed with a laser to reach exact resistance. 3. **Glass Cover:** A protective layer that seals the platinum from moisture and oxidation. 4. **Lead Wires:** Usually made of Ag/Pd (Silver/Palladium) or gold-plated nickel for high-temperature soldering or welding. --- ### 4. Typical Applications * **HVAC Systems:** Monitoring ambient air and duct temperatures. * **Medical Equipment:** Skin temperature sensors or laboratory incubators. * **Automotive:** Monitoring exhaust gases or intake air. * **Industrial Electronics:** Overheat protection for power supplies and motor controllers. --- ### 5. Measurement Circuit (Example) To read this sensor, a **Wheatstone Bridge** or a Constant Current Source is required to convert resistance changes into voltage. ```c // Example: Converting Pt100 Resistance to Temperature (Simplistic) float calculate_temp(float resistance) { // R0 = 100 Ohms // Alpha = 0.00385 return (resistance - 100.0) / (100.0 * 0.00385); } ``` ---