PIR Sensors

What are PIR Sensors?
PIR (passive infrared) sensors measures 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, and often used in PIR-based motion detectors. They 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.
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.
Where to install them?
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)

...
Read more Read less

Filters

Viewing 21 - 31 of 31 products
Results per page
Description Price Detector Type Sensor Radius Diameter Depth Width Height Series Tamper Resistant Additional Features
New
RS Stock No. 203-2218
Mfr. Part No.5WG1258-2DB12
BrandSiemens
$244.67
Each
units
- 4m - 3000 mm - - - - -
RS Stock No. 519-444
Mfr. Part No.LS2120
BrandABUS
$392.31
1 Set
Set(s)
IR Detector 120 m, 240 m - 72 mm 173mm 74 mm Profiline Yes -
RS Stock No. 740-4446
Mfr. Part No.6800-0-2519
BrandABB
$240.87
Each
units
PIR Motion Detector 24m - 110 mm 110mm 70 mm BasicLine Corridor - Brightness Independent Test Mode, Detect 2.5 m Height, For Switching Lighting System
RS Stock No. 327-7326
Mfr. Part No.AMN11112
BrandPanasonic
$32.06
Each
units
PIR Motion Detector 5m 11mm - - 14.5 mm NaPiOn - -
RS Stock No. 883-7869
Mfr. Part No.MDU2000-C930802
$18.65
Each
units
Motion Detector - - 27 mm 17.6mm 8.24 mm MDU20 - High Sensitivity, Low Cost, Low Power Consumption, Patch Antenna, RoHS Compliant, Small and Flat Profile
RS Stock No. 721-4938
Mfr. Part No.PPGI0601
BrandMurata
$6.55
Each
units
IR Detector - 21mm - - 6.4 mm - - -
New
RS Stock No. 203-2234
Mfr. Part No.5WG1258-2EB22
BrandSiemens
$302.02
Each
units
- 4m - 3000 mm - - - - -
RS Stock No. 883-7844
Mfr. Part No.MDU2750-C920101
$24.87
Each
units
Motion Detector - - 46 mm 37.75mm 9.8 mm MDU27 - High Sensitivity, High Stability, Low Cost, Low Power Consumption, Patch Antenna, RoHS Compliant, Small and Flat Profile
RS Stock No. 519-494
Mfr. Part No.LS2060
BrandABUS
$296.37
1 Set
Set(s)
IR Detector 120 m, 60 m - 72 mm 173mm 74 mm Profiline Yes -
RS Stock No. 524-5113
Mfr. Part No.BW8040
BrandABUS
$211.65
Each
units
PIR Motion/Microwave Detector 15m - 48 mm 60mm 107 mm XEVOX Yes White Light Immunity
RS Stock No. 524-5090
Mfr. Part No.BW8080
BrandABUS
$151.66
Each
units
PIR Motion/Microwave Detector 12m - 48 mm 60mm 107 mm XEVOX Yes Creep Zone, Pet Immunity
Related Products
The Na. PiOn sensor is currently the world's ...
Description:
The Na. PiOn sensor is currently the world's smallest passive infrared motion detector. Can be used with the built-in amplifier and comparator in a number of applications. AMN sensors extremely small in diameter. Use PIR 1000 switching electronics together with ...
Timeguard’s enhanced PIR detectors are suitable for either ...
Description:
Timeguard’s enhanced PIR detectors are suitable for either indoor or outdoor. This MLSA360N PIR offers multiple mounting options with full 360° detection over a 12m range for optimum coverage. Adjustable PIR detector with Pan & Tilt sensor aiming adjustment. Enhanced ...
The Legrand 048807 is an ECO2 lighting management ...
Description:
The Legrand 048807 is an ECO2 lighting management presence detector and ambient light sensor for passages, lobby areas and escalators / stairways with natural light. Checks presence and natural light level continuously and will switch off electric lighting when there ...
Secure detection from 20m up to 120m depending ...
Description:
Secure detection from 20m up to 120m depending on product selected. Relay switching and LED signal when triggered. Tamper proof, monitoring of transmitter and receiver via lid contactIP66 suitable for indoor and outdoor use. Supplied in pairs. If used in ...