Senba Sensing Technology Co., Ltd.
W216S Anti- WiFi Type PIR Senser from Senba Manufacturer
W216S Anti- WiFi Type PIR Senser from Senba Manufacturer

W216S Anti- WiFi Type PIR Senser from Senba Manufacturer


W216S PIR sensor is a type of anti- WiFi. It is widely used for Security system, Doorbell, IP Camera, Lighting, home application. The product is a type of intelligent PIR sensor which integrates digital control.

PIR sensor sense the motion object, always used to detet the human. There is a detect rang for the PIR sensor. When a people move in or out of the detect rang, the PIR sensor will be triggered. PIR sensor are low-power, small, easy to used. For this reason it can be used for the alarm system and lighting control. PIR sensor also named passive infrared, Pyroelectric or IR motion sensor.  


  • Anti-Wifi Interference

  • Enhanced Immunity to 2.4G High Frequency

  • Slight movement can be detectable




Encapsulation Type


IR Receiving Electrode

2×1mm, 2 elements

Window Size


Spectral Response




Output Signal[Vp-p]




Detectivity (D*)

≥1.4 ×108 cmHz1/2/W



Output Balance


Offset Voltage


Supply Voltage


Operating Temp


Storage Temp




Field of View





Equivalent Circuit



  • Security cameras

  • Security alarm system

  • Security Equipment



1.What can trigger a PIR sensor?

Five Causes of PIR False Alarms. The first cause of PIR false alarms is low or unstable voltage at the detector. Test to make sure the voltage at each PIR is above 13VDC and stable. The second cause of false alarms is sudden infrared movement / heat changes in view of the detector.


2.How do PIR sensors work?

When the sensor is idle, both slots detect the same amount of IR, the ambient amount radiated from the room or walls or outdoors. When a warm body like a human or animal passes by, it first intercepts one half of the PIR sensor, which causes a positive differential change between the two halves.

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