Senba ISB-TS45D Infrared Thermopile Sensor for Non-Contact Temperature Detection - TO-46 Metal Package

The built-in NTC (Negative Temperature Coefficient) thermistor measures the ambient temperature of the sensor package itself. This reading is used to compensate for the sensor's own temperature drift, which is critical for obtaining accurate target temperature measurements. Without this compensation, changes in the sensor's operating environment would directly affect the output signal.

The sensor is primarily designed for indoor use. For outdoor deployment, you must implement suitable protective measures. This includes adding an appropriate external optical filter to block environmental interference and designing a fully sealed, moisture-proof enclosure to prevent condensation, dust ingress, and degradation from corrosive gases or SEA breeze, as specified in the design restrictions.

Hand soldering must be performed carefully to avoid thermal damage. The pin temperature should not exceed 260°C, and the heating time should be limited to a maximum of 10 seconds. After soldering, all flux residues must be thoroughly cleaned using a brush and appropriate solvent; do not use an ultrasonic cleaner as the vibrations can damage the delicate internal thermopile structure.

The 5μm long-wave pass filter integrated into the sensor's TO-46 package acts as a spectral window. It allows infrared radiation with wavelengths longer than 5 micrometers to pass through to the thermopile element while blocking shorter wavelengths, including visible light. This ensures the sensor primarily responds to the thermal infrared radiation emitted by objects, which is essential for accurate temperature sensing.