PB-10 Presence detector with person counter

Everybody knows the main problems with the use of movement detectors for room light control: No movement - no light after a while, and the light stays on, even if the last person has already left the room...

Here is the solution: The PB-10 is attached beside the door of a room. The PB-10 recognizes the direction of motion of a person through the door with the assistance of two independent infrared sensors that can be mounted in or on a door. At the same time an internal person counter saves/logs the number of persons, who enter or leave the room by the door. An internal relay will switch on if the number of persons in the room is >1 and will switch off if all persons left the room and the person counter is down to zero. The PB-10 is equipped with an RS485 interface, over which up to three devices at different doors in the area can "talk" to each other in order that all devices always know the correct and current person's number in the room. 3 internal dip switches allow different modes. The accuracy is about 99 %, depending of the position of the sensors inside of the door. However, a small push button allows the user to switch the light and reset the person counter by hand.

The PB10 serie contains 3 different  devices:

The PB10A is a präsencedetector with a build in power supply and a switchrelay. The PB10A can feed 2 other devices with power and make the communication between the different devices via 4 wires

The PB10P is a passive version without a power supply and relay. It is be intended to install it on an other door in the room.

The PB10D is a display unit  with which the current person's number (up to 99 persons) can be displayed. 

Here are a few possible combinations:

Specifications: