Twilight switch with surface-mounted sensor EEN003. Twilight switch measures the light intensity via a photocell and switches a circuit on or off depending on the measured and set value with additional switching status display. Measurement in two brightness ranges and setting of the ON/OFF delay time. Switch for permanent ON/OFF or automatic/test operation. Integrated connection error and contact display for the sensor. Supplied in a set with a surface-mounted sensor EEN003.