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Surface mounted infra-red motion sensor with daylight control

Surface mounted infra-red motion sensor with daylight control


  • Motion and daylight detection.
  • Fully adjustable for time-out (from 10 seconds to 7 minutes) and daylight-sensitivity.
  • Ideal for energy saving installations in the workplace, corridors, offices, toilets etc.
  • Up to 1200W Tungsten loading.
  • Up to 20W LED loading.
  • 360 degree detection zone for optimum coverage.
  • Up to 6m detection range.


body diameter
88 mm
43 mm
power source
220-240V AC - 50/60 Hz
power consumption
0.45W (work); 0.1W (static)
maximum load
1200W (incandescent lamps), 300W (energy-saving lamp), 20W (LED lamp)
detection range
6m maximum diameter (<24OC)
time-out period
adjustable 10 sec (+/-3 sec) to 7 minutes (+/- 2 minutes)
ambient light
3-2000 lux (adjustable)
installation height
2.2m to 4m

Installation (by qualified electrician only)

  • Avoid use in areas subject to drafts from radiators, air conditioning, etc.
  • Not recommended for external use.
  • Ensure maximum load (per lamp type) is not exceeded (see specification).
  • Switch off power.
  • Remove front cover (turn anticlockwise).
  • Unscrew mains cover and mount base to ceiling.
  • Connect power and load (see below).
  • Screw back power cover.
  • Adjust settings, replace cover: switch on power.

Testing and adjusting settings

  • To test, turn LUX dial fully clockwise (max), turn the TIME dial fully anticlockwise (min) and turn the SENS dial to centre position.
  • Once power is switched on there is a 30-second warm-up period, after which lights switch on upon detecting motion and stay on for 10 seconds after no motion is sensed.
  • To increase ON period, turn TIME clockwise.
  • To reduce daylight level at which sensor operates, turn LUX anti-clockwise.
  • To adjust range/sensitivity, turn SENS dial.


Lights don’t come on

  1. Check power is on and wiring is correct.
  2. Check the lamp is working.
  3. Adjust the LUX dial to a higher setting in case the sensor thinks there is enough light.

Sensitivity is low

  1. Check for obstructions in front of sensor.
  2. Check mounting height is within specified range.
  3. Check ambient temperature is not too high.

Lights don’t go off

  1. Reduce the time-out period by adjusting the TIME dial.
  2. Check the wiring is correct and the lamp is wired to the “live out” terminal.
  3. Make sure there is not repeated movement in the detection field.
  4. Check there are no sources of temperature change near  sensor such as air conditioning or heating.


The surface-mounted LCD503 sensor optimises energy efficiency by relating use of lighting to occupation (motion) in an area as well as to the amount of daylight contribution. The compact, surface-mounted unit is perfect for mounting onto ceilings within corridors, stairwells, lobbies and a wide range of other areas.

£15.00 VAT included Availability: In Stock
Free delivery on all orders

Lighting Controls Direct sensors optimise energy efficiency by controlling lights based on motion as well as the amount of daylight - save energy, cut energy bills, and reduce your carbon footprint.