Twilight switch with remote sensor is suitable for controlling lighting systems such as house lighting, courtyard lighting, shop window lighting, etc. Control unit for mounting on mounting rail, optionally adjustable to approx. 5...500 lux or 100...10,000 lux. Remote sensor is supplied without connection cable. Sensor can be extended to a maximum of 50 m with 2x1.5 mm2. With mounting clip for remote sensor. The delay is designed so that short-term changes in brightness, such as car headlights or flashes, have no influence on the switching behavior.