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 is sufficient natural light
Occupancy mode (automatic switch off/on factory setting)
Light level threshold adjustable from 5 to 1275 lux
Fixed directly to a false ceiling with mounting claws (incluses)
3-Wire wire neutral
Standby consumption: 0.4W
Recommended fixing height: 2.5 metres
Range diamerer: 8 metres
Optimum distance between two sensors: 6 metres
Connection via automatic terminals
ECO2 device

Daylight Lighting Controllers

These controllers automatically turn lights 'ON' and 'OFF' in response to changes in ambient light levels, primarily the transition from day to night and vice-versa. The more advanced types (see note below) have inbuilt logic to minimise false triggering, whereas the remainder have inbuilt time delays or higher 'OFF' thresholds, to prevent on/off cycling. As a general rule, these controllers should be sited such that they are not illuminated, by the light they are controlling. Nominal supply voltage is 230Vac.,Note regarding energy-saving negative-hysteresis controllers,Where figures for the 'OFF' threshold are lower than for the 'ON' threshold, the sensor is designed such that four thresholds are actually monitored. These are: dusk, the middle of the night, dawn and the middle of the day. Monitoring at times other than dusk and dawn enables the sensor to determine what it should be looking for next, minimising false triggering and improving overall controller operation.