Rademacher 3710-075 sun / -Dämmerungs sensor for Rollotron & Troll, L 0.75m (tool)
By d. Sun or twilight module has a gain, since with strong solar radiation d. Shutters automatically goes down. one is not always present. Also for the plants it does not burn indoors. If done before the shutters already down, d. All day dark for pla