The brightness sensor measures the brightness in the outdoor area. The brightness is converted into an analog measuring signal in 4..20mA.
This signal can be recorded e.g. with a PLC and used further depending on the function. The sensor requires only two terminals for the 4...20mA signal.
Inside the sensor has a dip switch where you can set the measuring range.
The sensor does not contain any operation. If possible, the lens of the sensor can be wiped with a damp cloth each time the tunnel is cleaned.