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庫存編號 796-2059
BrandRS PRO
TWD4,562.00
單位
- - - 88mm - 112mm 112 mm - - -
RS庫存編號 711-8561
BrandRS PRO
TWD4,232.00
單位
- - - 76mm - - 65 mm - - -
RS庫存編號 711-8568
BrandRS PRO
TWD3,637.00
單位
- - - 76mm - - 65 mm - - -
RS庫存編號 796-2097
BrandRS PRO
TWD552.00
單位
- - - - - - - - - -
RS庫存編號 796-2019
BrandRS PRO
TWD2,453.00
單位
- - - 76mm - 64.9mm 61.2 mm - - -
RS庫存編號 796-2009
BrandRS PRO
TWD1,370.00
單位
- - - 76mm - 64.9mm 61.2 mm - - -
RS庫存編號 851-2790
製造零件編號SensIQ S Evo BLK
BrandSteinel
TWD5,439.00
單位
- - - - 128 mm 114mm 74 mm - - -
RS庫存編號 700-9271
BrandRS PRO
TWD2,612.00
單位
- - - 28mm - - 22 mm - - -
RS庫存編號 327-7310
製造零件編號AMN11111
BrandPanasonic
TWD931.00
單位
PIR Motion Detector 5m - 11mm - - 14.5 mm NaPiOn - -
RS庫存編號 796-2047
BrandRS PRO
TWD4,228.00
單位
- - - 88mm - 112mm 112 mm - - -
RS庫存編號 759-5693
製造零件編號LRM 1070
TWD2,232.00
單位
Motion Detector - - - - - - - - -
RS庫存編號 169-3888
製造零件編號PPGI0601
BrandMurata
TWD77.00
個 (以毎盒:100)
單位
IR Detector - - 21mm - - 6.4 mm - - -
RS庫存編號 777-7748
製造零件編號6800-0-2556 6867 AGM-35-500
BrandABB
TWD6,522.00
單位
- - - - 141 mm 125mm 115 mm - - -
RS庫存編號 721-4938
製造零件編號PPGI0601
BrandMurata
TWD141.00
單位
IR Detector - - 21mm - - 6.4 mm - - -
RS庫存編號 796-2056
BrandRS PRO
TWD4,319.00
單位
- - - 88mm - 112mm 112 mm - - -
RS庫存編號 815-5234
製造零件編號AMN34111
BrandPanasonic
TWD869.00
單位
- - - - - - - - - -
RS庫存編號 796-2034
BrandRS PRO
TWD3,079.00
單位
- - - 28mm - - 30 mm - - -
RS庫存編號 796-2012
BrandRS PRO
TWD2,596.00
單位
- - - - 86 mm 86mm 19 mm - - -
RS庫存編號 766-0094
製造零件編號MLSA360N
TWD2,168.00
單位
Motion Detector - - - 125 mm 80mm 95 mm - - -
RS庫存編號 827-2758
製造零件編號0 784 54
BrandLegrand
TWD4,284.00
單位
- - - - - - - - - -