Ceiling surface-mounted plug-in PIR occupancy switch


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Ceiling surface-mounted
plug-in PIR switch.

These surface-mounted models are ideal for solid ceilings.

The CELO has a built-in plug suitable for the CESO SQ Ceiling socket (or CESO Ceiling socket). CESO SQ can be mounted on a square pattress box (the CESO can be mounted on a BESA box).

Product code: CELO

Requires socket order code: CESO SQ or CESO



Detection Zone: 360°
Time lag range: 10 seconds to 40 minutes in 9 steps
Photocell range: 30 to 1000 lux, and inactive
Loading: Up to 6 amps (1500W) of resistive loads.
Up to 6 amps (1500W) of fluorescent loads.
Up to 3 amps (750W) of electronic and wire wound transformer loads.
Up to 2 amps (500W) of CFL, 2D lamps, LED Drivers and LED lamps and fittings.
Up to 1 amp (250W) of fans.
Dimensions: 86 x 86 x 47mm. Requires back box depth 16mm



  • DimensionsOpen or Close
    CELO  celo-dimensions
  • Detection DiagramsOpen or Close

    icn-detection-strongStrong detection zone
    ie. person moving arm

    icn-detection-secondarySecondary detection zone
    ie. person walking (less sensitive when walking straight towards PIR switch)

    PIR Quad detector gives 124 detection areas within the zone


    Perspective view of detection zone

    For optimum coverage recommended mounting height between 2.4 and 5m


    Several PIR occupancy switches


    In open plan areas

    For best coverage the CELO should be spaced every 5m in either direction

  • Wiring DiagramsOpen or Close
    Single CELO wd16a
    A few CELO wired in parallel wd16b
    Ceiling mounted socket (CESO SQ or CESO) wd16c