Ceiling surface-mounted PIR occupancy switch


Ceiling surface-mounted PIR switch.

These surface-mounted models are ideal for solid ceilings.

The CESF PIR is a hard wired version and can be mounted on a square pattress box (order code: PABO).

Product code: CESF PIR

Download Installation Guide




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 22mm. Requires back box depth 16mm



  • DimensionsOpen or Close
    Requires 16mm deep box cesf-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)

    For optimum coverage recommended mounting height between 2.4 and 5m.

    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 PIR occupancy switches should be spaced every 5m in either direction

  • Wiring DiagramsOpen or Close
    Single CESF PIR wd15a
    A few CESF PIR wired in parallel wd15b



Ceiling surface-mounted PIR occupancy switch variants

Variants are available on request such as 24V or 12V (a.c. or d.c.), ideal for low voltage control systems. To special order we can also supply volt free outputs for mains, 24V or 12V supplies (including versions with gold contact relays).