PIR Sensors | PIR Motion Sensors | RS
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    PIR Sensors

    PIR, passive infrared sensors measure infrared (IR) light radiating from moving objects that emit heat. The sensor allows you to detect the 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. Want to know more? Find out everything you need to know in our PIR sensors guide.

    Where are PIR Motion 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 and 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, and front and back entries. The ideal position is 2 to 3 metres above the ground.

    Motion sensors are also used in the workplace 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)

    142 產品顯示為 PIR Sensors

    • RS庫存編號 851-2775
    • 製造零件編號 603212
    HK$1,076.60
    Steinel
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    56 mm
    76mm
    120 mm
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    • RS庫存編號 766-0094
    • 製造零件編號 MLSA360N
    HK$510.60
    Timeguard
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    Motion Detector
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    125 mm
    80mm
    95 mm
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    • RS庫存編號 519-494
    • 製造零件編號 LS2060
    整套:1 个
    HK$1,464.41
    ABUS Security-Center
    Tamper Resistant
    IR Detector
    60m
    -
    -
    72 mm
    173mm
    74 mm
    Profiline
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    -
    -
    • RS庫存編號 211-1451
    • 製造零件編號 QBM-220-240-LS/PD-HB-CI
    HK$2,327.78
    Osram
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    • RS庫存編號 721-4938
    • 製造零件編號 PPGI0601
    HK$25.90
    Murata
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    IR Detector
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    21mm
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    6.4 mm
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    -
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    • RS庫存編號 206-8804
    • 製造零件編號 4058075244771
    HK$746.00
    LEDVANCE
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    • RS庫存編號 828-1046
    • 製造零件編號 PIR700W
    HK$201.70
    PowerLED
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    • RS庫存編號 169-3888
    • 製造零件編號 PPGI0601
    个 (以毎盒:100)
    HK$17.742
    Murata
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    IR Detector
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    21mm
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    6.4 mm
    -
    -
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    • RS庫存編號 276-9313
    • 製造零件編號 MTN630819
    HK$2,827.00
    Schneider Electric
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    Presence Detector
    7m
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    • RS庫存編號 203-2218
    • 製造零件編號 5WG1258-2DB12
    HK$1,850.00
    Siemens
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    4m
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    3000 mm
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    • RS庫存編號 252-0167
    • 製造零件編號 52371
    HK$1,050.04
    Hager
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    Motion Detector
    6m
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    90mm
    61 mm
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    -
    -
    -
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    -
    • RS庫存編號 275-4723
    • 製造零件編號 PDRS1500N
    HK$687.70
    Timeguard
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    PIR Motion Detector
    12m
    Not Included
    12mm
    46 mm
    -
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    -
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    • RS庫存編號 275-4726
    • 製造零件編號 SLW2300
    HK$398.30
    Timeguard
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    PIR Motion Detector
    12m
    Not Included
    -
    141 mm
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    • RS庫存編號 193-8228
    • 製造零件編號 4058075232969
    HK$2,122.15
    Osram
    Tamper Resistant
    Connected Sensor
    40m
    -
    95mm
    66 mm
    95mm
    66 mm
    L0 A001
    -
    -
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    • RS庫存編號 275-4724
    • 製造零件編號 PDSM1500
    HK$655.50
    Timeguard
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    PIR Motion Detector
    10m
    Not Included
    86mm
    53 mm
    -
    -
    -
    -
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    • RS庫存編號 275-4737
    • 製造零件編號 ZV810N
    HK$556.90
    Timeguard
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    PIR Motion Detector
    8m
    Not Included
    78mm
    38 mm
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    -
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    Better World
    • RS庫存編號 272-7454
    • 製造零件編號 CCT595012
    HK$429.10
    Schneider Electric
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    Motion Detector
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    1.5V Alkaline
    70.8mm
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    26.6mm
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    Wiser
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    Yes
    Green Premium
    • RS庫存編號 279-4635
    • 製造零件編號 AC-OPIR
    HK$1,486.70
    Yale
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    Motion Detector
    200m
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    • RS庫存編號 202-7614
    • 製造零件編號 U054
    HK$35.45
    M5Stack
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    IR Detector
    5m
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    20 mm
    25mm
    24 mm
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    • RS庫存編號 206-8802
    • 製造零件編號 4058075244733
    HK$230.30
    LEDVANCE
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