Light Intensity Switches Ex9L are used for light switching according to actual daylight intensity (Ex9LD device also according to time), so the light fixtures are switched only if necessary and it can save money for consumed energy.
Analogue version works with one switching channel.
Digital version can work with photoelectric and time switch on 2 channels. This switch can automatically change between summer and wintertime. It operates in weekly switching program and can be connect to light control systems with other devices.
External brightness sensor is included in the scope of delivery.