The D204B pyroelectric infrared sensor detects infrared radiation on the basis of the characteristics that the polarization of pyroelectric material changes with temperature. Dual compensated sensing elements are applied to suppress the interference resulting from temperature variation with the EMI components. As a result, the operating stability of the sensor is greatly improved.
Features
- Large window anti-interference type
- Excellent noise resistance (RF noise, power noise), high sensitivity and excellent signal-to-noise ratio
- Excellent environmental stability
- The use of the RC filter circuit and an RC frequency selection circuit enhances the electromagnetic compatibility of the pyroelectric sensor
- High immunity to radio frequency interference (RFI) up to 1 cm away
- The interference filter has a high cut-off depth and strong anti-white light ability, which greatly improves the anti-false alarm ability of the sensor
- The junction field effect transistor realizes impedance transformation in the form of source follower
- Suitable for intrusion detectors for burglar alarms, human body detectors for air conditioners, etc
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