CdS Photocell operated dusk-till-dawn lighting controller

Fitted with a conical, UV stable, impact resistant, translucent cover
Omni-directional
Cadmium sulphide photocell operation

NEMA rotaloc socket, wall mounting bracket, gaskets and fixings

Automatically regulate lighting systems in residential and industrial areas with this controller from Royce Thompson Electric. The device has a cadmium-sulfide photoelectric sensor that turns your electric lights on or off depending on the time of day, saving you energy. A time delay function is on hand to prevent false triggering and allow for accurate monitoring. The unit is housed in a conical, translucent cover that provides reliable impact protection, so it's suitable for use in harsh environments.

• Low power consumption of 0.6W for energy efficiency
• Voltage rating of 230V, so suitable for low-voltage systems
• Wide operating temperature range of -20°C to +80°C for use in demanding conditions
• IP65 (ingress protection) rated to withstand dust and low-pressure water jets
• Flame retardant plastic components for safe use in hazardous areas

• Industrial security lighting
• Residential exteriors
• Car parks

To prevent malfunction, when installing this lighting controller, it's important to ensure that it's positioned in a spot where it can't be illuminated by the lights it's meant to control.

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.