Light intensity sensors | S+S Regeltechnik

Light intensity sensors

Our PHOTASGARD® brightness sensors / brightness sensors have been specially adapted to eye sensitivity - their greatest sensitivity is in the range from 350 to 820 nm. Thanks to a special filter, the sensors are thus suitable for measuring the illuminance of daylight and/or artificial light. Brightness sensors do not measure movement.


Where is a light intensity sensor used?

The task of a light sensor is to measure brightness. This is done by a special sensor that can be additionally attached to the lighting equipment. This can refer as well to the measurement of artificial light/daylight indoors as to the measurement of daylight outdoors. If the brightness level falls below the predefined value, a function is triggered.
  • Indoor application: at working places, in corridors, offices, living and business rooms as well as industrial and storage halls as daylight-dependent constant light control, as brightness sensor or twilight sensor and as sun protection control to avoid unnecessary room heating, light sensor is used.
  • Outdoor application: the sensors are used to control luminaires, lighting systems, blinds and awnings as well as to monitor lighting conditions outdoors, in industrial halls, greenhouses, warehouses or workplaces.

How does a luminosity sensor work?

Light/illumination sensors measure the lighting intensity of their surroundings. If this brightness level falls below a defined value, a connected lighting system is activated. Our PHOTASGARD® brightness sensors / light sensors have been specially adapted to eye sensitivity - their main sensitivity is in the range of 350 to 820 nm. With a special filter, the sensors are thus predestined for measuring the illuminance of daylight and/or artificial lights with a high colour temperature (similar to sunlight).

What is the difference between a light intensity sensor and a motion detector?

Light sensors measure the brightness of a room or outdoor area. If the level falls below or exceeds a defined value, the sensor triggers a predefined action. Light sensors do not measure movement.
Motion sensors, on the other hand, react exclusively to movement and thus provide additional lighting in dark corners - regardless of the ambient brightness.

Quality products - Made in Germany!

Your demand is our motivation: we develop and manufacture our brightness/light sensors and motion detectors directly at the S+S site in Nuremberg and guarantee maximum quality for trouble-free operation and a long product life. Our stock items are usually dispatched within 1-2 working days via DHL.

Order light sensors and motion detectors online at - quick and easy

In our online shop you will find brightness / light sensors as well as presence and motion detectors for almost every application. The convenient navigation makes it easy to find the device you are looking for.
Do you have any questions about the product? Our service team is always available by phone or email to help you navigate and shop online in our shop. Find the right sensor for your application even today!