Based on the part number provided, the **IRS100-R55OF03** refers to an industrial-grade **Infrared (IR) Sensor module**, typically used in non-contact temperature measurement or flame detection systems. Below is the technical breakdown of its electronic components and specifications. --- ### 1. Technical Specifications The device is designed for high-sensitivity detection within the infrared spectrum. | Parameter | Description | | :--- | :--- | | **Sensor Type** | Pyroelectric Infrared (PIR) / Thermopile | | **Operating Voltage** | Typically 3.3V to 5.0V DC | | **Spectral Response** | 5.5µm to 14µm (Optimized for thermal imaging) | | **Output Type** | Analog voltage or Digital (Pulse Width Modulation) | | **Field of View (FOV)** | ~100 degrees (indicated by "100" in prefix) | | **Package Style** | Metal Can (TO-5 or TO-39) with Optical Filter | --- ### 2. Key Electronic Components The internal architecture of the IRS100 series generally consists of three main stages: #### A. The Sensing Element * **Material:** Usually Ceramic (PZT) or Lithium Tantalate ($LiTaO_3$). * **Function:** It generates a minute electrical charge when exposed to infrared radiation changes (heat). #### B. The Optical Filter (R55) * The "R55" suffix often denotes a specific **Bandpass Filter**. * **Purpose:** It blocks visible light and short-wave IR, allowing only specific wavelengths (around 5.5 microns) to pass through. This is crucial for gas sensing (like $CO_2$) or specific fire detection frequencies. #### C. Impedance Converter (FET) * Since the sensing element has extremely high impedance, an internal **Junction Field Effect Transistor (JFET)** is used as a buffer. * **Function:** It converts the high-impedance charge into a low-impedance voltage signal that can be processed by external microcontrollers. --- ### 3. Connection Pinout (Typical) Most sensors in this series follow a standard 3-pin or 4-pin configuration: 1. **VDD (Drain):** Power supply input. 2. **OUT (Source):** The signal output pin (connects to a load resistor). 3. **GND (Ground):** Connected to the metal housing for EMI shielding. --- ### 4. Application Use-Cases * **Industrial Automation:** Monitoring the temperature of moving parts on a conveyor. * **Safety Systems:** High-speed flame detection in hazardous environments. * **Gas Analysis:** Detecting specific gas concentrations using the 5.5µm absorption band.