PIR Sensors

PIR (passive infrared) sensors measure infrared (IR) light radiating from moving objects that emit heat. The sensor allows you to detect motion of people, animals and cars to trigger security alarms and lighting. They are often used in PIR-based motion detectors. PIR sensors are passive due to the fact that no heat or energy is emitted by the sensor and they detect the emission of infrared radiation and not heat.

Where are PIR sensors used?

These sensors are used to detect movement and are ideal for security and safety such as burglar alarms and security lighting systems. They can also be called PID passive infrared detectors (PID). They can be used internally & externally and can be mounted to ceilings & walls. PIR sensors have various ranges and styles including pet friendly options (designed to ignore certain shapes of moving objects, or only detect motion above a certain height). PIR sensors are used for applications such as automatically turning on lights when a person enters a room or causing a video camera to start recording.

How does a PIR sensor work?

All objects emit some level of radiation (not visible to the human eye) and the hotter something is, the more radiation is emitted. The sensor detects levels of infrared radiation impinging upon it which varies depending on the temperature of the objects in front of the sensor. When a warm object (person or animal) walks in front, the temperature in the sensor’s field of view will increase from room to body temperature. The sensor converts this change in the incoming infrared radiation into a change in the output voltage and this triggers the detection.

How are PIR sensors installed?

They are quick and easy to fit using the screws and plugs that are supplied to mount an adjustable bracket onto the wall or ceiling. They come in varying ranges, once you know the range of the sensor and how far it can detect you can therefore plan your security coverage. Areas recommended include corners, hallways, patios, driveways, front and back entries. Ideal position being 2 to 3 metres above the ground.

Motion sensors are also used in the work place for example to shut down equipment that could be dangerous if the worker gets too close.

These sensors should not be installed:

  • Directly above a radiator (change in infrared heat could trigger the alarm)
  • Directly looking into a window (sunlight can cause confusion for the sensor)
  • In rooms where a number of animals are present
  • Near air vents (temperature change might trigger the alarm)

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Description Price Detector Type Sensor Radius Battery Diameter Depth Width Height Series Tamper Resistant Additional Features
RS Stock No. 796-2059
BrandRS PRO
TWD4,370.00
Each
units
- - - - - - - - - -
RS Stock No. 711-8561
BrandRS PRO
TWD4,216.00
Each
units
- - - - - - - - - -
RS Stock No. 796-2097
BrandRS PRO
TWD524.00
Each
units
- - - - - - - - - -
RS Stock No. 711-8568
BrandRS PRO
TWD3,624.00
Each
units
- - - - - - - - - -
RS Stock No. 796-2009
BrandRS PRO
TWD1,365.00
Each
units
- - - - - - - - - -
RS Stock No. 796-2019
BrandRS PRO
TWD2,444.00
Each
units
- - - - - - - - - -
RS Stock No. 327-7310
Mfr. Part No.AMN11111
BrandPanasonic
TWD830.00
Each
units
PIR Motion Detector 5m - 11mm - - 14.5 mm NaPiOn - -
RS Stock No. 851-2790
Mfr. Part No.SensIQ S Evo BLK
BrandSteinel
TWD5,419.00
Each
units
- - - - - - - - - -
RS Stock No. 700-9271
BrandRS PRO
TWD2,603.00
Each
units
- - - - - - - - - -
RS Stock No. 796-2047
BrandRS PRO
TWD4,050.00
Each
units
- - - - - - - - - -
RS Stock No. 766-0094
Mfr. Part No.MLSA360N
TWD2,161.00
Each
units
- - - - - - - - - -
RS Stock No. 169-3888
Mfr. Part No.PPGI0601
BrandMurata
TWD68.50
Each (In a Box of 100)
units
IR Detector - - 21mm - - 6.4 mm - - -
RS Stock No. 796-2012
BrandRS PRO
TWD2,487.00
Each
units
- - - - - - - - - -
RS Stock No. 759-5693
Mfr. Part No.LRM 1070
TWD2,232.00
Each
units
- - - - - - - - - -
RS Stock No. 827-2758
Mfr. Part No.0 784 54
BrandLegrand
TWD4,140.00
Each
units
- - - - - - - - - -
RS Stock No. 796-2034
BrandRS PRO
TWD2,950.00
Each
units
- - - - - - - - - -
RS Stock No. 777-7748
Mfr. Part No.6800-0-2556 6867 AGM-35-500
BrandABB
TWD5,427.00
Each
units
- - - - 141 mm - 115 mm - - -
RS Stock No. 721-4938
Mfr. Part No.PPGI0601
BrandMurata
TWD126.00
Each
units
IR Detector - - 21mm - - 6.4 mm - - -
RS Stock No. 796-2056
BrandRS PRO
TWD4,319.00
Each
units
- - - - - - - - - -
RS Stock No. 524-5107
Mfr. Part No.BW8070
BrandABUS
TWD2,071.00
Each
units
PIR Motion Detector 12m - - 48 mm 60mm 107 mm XEVOX Yes Creep Zone, Pet Immunity