Based on the model number **FRTD-R-A1G-R**, this component typically refers to a **Resistance Temperature Detector (RTD)** transmitter or sensor assembly, commonly used in industrial automation for temperature measurement. Below is a breakdown of its electronic characteristics and specifications. ### 1. Component Identification The part number is characteristic of high-precision temperature sensing modules (often associated with brands like **Azbil** or similar industrial sensor manufacturers). | Feature | Description | | :--- | :--- | | **Sensor Type** | RTD (Resistance Temperature Detector) | | **Element** | Typically Pt100 (Platinum 100 Ohms at 0°C) | | **Output Type** | Resistance or Analog (Current/Voltage) depending on the transmitter | | **Application** | Precise liquid or gas temperature measurement | --- ### 2. Electronic Specifications These devices are designed to convert physical temperature changes into a measurable electrical signal. * **Resistance Characteristic:** As temperature increases, the resistance of the internal platinum element increases linearly. * **Operating Voltage:** If this includes a transmitter (the "R-A1G" suffix often denotes specific output scaling), it typically operates on **24V DC**. * **Output Signal:** Common industrial standards include **4-20mA** or **1-5V DC**. * **Accuracy:** Usually Class A or Class B (±0.15°C to ±0.3°C at 0°C). --- ### 3. Wiring Configuration Most industrial RTDs of this series use a 3-wire or 4-wire configuration to compensate for lead-wire resistance. ```text Terminal Function ----------------------- A / 1 Excitation (+) B / 2 Sense (-) b / 3 Compensation (-) ``` --- ### 4. Key Electronic Features 1. **Linearity:** High linearity over a wide temperature range compared to thermocouples. 2. **Stability:** Platinum elements provide excellent long-term stability and repeatability. 3. **Noise Immunity:** The "R-A1G" variant often includes internal filtering to reduce EMI (Electromagnetic Interference) in factory environments. 4. **Environmental Protection:** Usually housed in an IP65/67 rated enclosure to protect the electronics from moisture and dust. ---