The **HTS-00-R/Q** is a high-performance, miniature **Non-Contact Infrared Temperature Sensor** (Thermopile) developed by Heimann Sensor. It is designed for remote temperature measurement in consumer electronics and industrial automation. --- ### 1. Key Technical Specifications The device operates on the principle of detecting infrared radiation and converting it into a voltage signal. | Feature | Specification | | :--- | :--- | | **Sensor Type** | Thermopile | | **Filter Type** | Long-Wave Pass (Standard LWP) | | **Thermistor Resistance** | ~100 kΩ (at 25°C) | | **Thermopile Resistance** | ~80 kΩ to 120 kΩ | | **Operating Temperature** | -20°C to +120°C | | **Package Style** | TO-46 (Miniature Metal Can) | --- ### 2. Internal Electronic Components The HTS-00-R/Q consists of two primary internal elements integrated into a single housing: #### A. The Thermopile Chip * **Function:** This is the primary sensing element consisting of several thermocouples connected in series. * **Operation:** When IR radiation hits the "hot junctions" of the chip, it creates a minute DC voltage (microvolts) proportional to the temperature difference between the object and the sensor. #### B. The Reference Thermistor * **Function:** Because the thermopile measures the *difference* in temperature, the sensor needs to know its own local temperature (Ambient Temperature). * **Operation:** A built-in NTC (Negative Temperature Coefficient) thermistor measures the package temperature. This data is used by the external microcontroller to calculate the absolute temperature of the target object. --- ### 3. Application and Circuit Integration To use the HTS-00-R/Q in an electronic circuit, the following stages are typically required: 1. **Amplification:** Since the output signal is in the microvolt ($\mu V$) range, a high-precision, low-drift **Operational Amplifier** (Instrument Amp) is required. 2. **Analog-to-Digital Conversion:** A high-resolution ADC (at least 16-bit) is recommended to capture the small voltage changes. 3. **Signal Processing:** A microcontroller (MCU) applies the **Steinhart-Hart equation** for the thermistor and a compensation algorithm for the thermopile output. --- ### 4. Comparison: R vs. Q Variants The "R" and "Q" designations usually refer to specific filter or aperture variations: * **HTS-00-R:** Often denotes a standard filter for general-purpose thermometry. * **HTS-00-Q:** May refer to a specific narrow-band filter or a variation in the Field of View (FOV) geometry. ---