Royce Thompson Electric Lighting Controller Detector, Cadmium Sulfide, Wall Mount, 230 V

Fine-tune your lighting with this versatile controller from Royce Thompson Electric. With settable levels between 10 and 1,000 lux, it lets you decide on the ideal amount of brightness for foyers, hallways and underpasses. A cadmium-sulfide sensor accurately detects light changes, to be sure your system automatically switches on and off at the right time. Thanks to a switching delay between 10s and 40s, the unit resists accidental activation caused by rogue flashes of light. As it works with halogen, LED and discharge bulb types, this is a widely compatible option for use with communal, amenity and security lighting systems.

• Rugged polycarbonate housing ensures durability
• Low power consumption of 2.5W for energy efficiency
• Wide operating temperature range between -20°C and +40°C to handle harsh conditions
• Compact dimensions of 93 (L) x 67 (W) x 50mm (D) to save on space

• Residential blocks
• Public buildings
• Pedestrian walkways
• Commercial and retail units
• Floodlighting

It has an IP54 rating, so it's protected from dust and water splashes.

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.