The most basic type of external sensors in our system. They are all based on a relay that disconnect the mains when there is no presence in the room or if there is sufficient light in the room caused by incoming daylight. Here you will find sensors for standard room applications, for extreme wide detection area (WB) and a more high beam sensor (NB). Slave sensors do not have any relay but can widen the detection area so that you can cover a larger room.