RHKF-U Room light intensity sensor

Room light intensity sensor

Power supply 24 V AC/DC, measuring range 0..500 lx / 1 klx / 20 klx (switchable), output 0..10V, wall-mounted, IP30, dimensions 79 x 81 x 26 mm


The room light intensity sensor with selectable range measures natural or artificial light level in rooms, halls, workshops, and other areas. It provides analogue output signal 0...10V or 4..20 mA DC.

  • Room light control, interlocking of lights in public rooms, blinds control etc.
  • Monitoring of light level at workplaces, stores, halls etc.

The sensor uses a photodiode, the signal of which is processed and transformed into a voltage or current normalized signal at the output terminals. The DIP switch selects one of four ranges. The photodiode is optimized so as to fit the wavelengths which are perceived by human eyes (350...820 nm). 

The sensor is fixed using 2 or 4 screws to a flush-mount box (Ø 55 mm) or to any flat surface. In the lower part of the bottom there is an aperture for cable pass-through.

* RHKF-I, 4..20 mA