the function of bircher sensor : BIRCHER sensor printed circuit board is installed in the (modular system), or integrated into a shell assembly in advance (single sensor).BIRCHER scanning range set of mechanical speed unit by changing the Angle between the transmitter and the receiver of the device.The process of light is called triangulation or optical difference measurement.A few bundles in a modular system, can form the line.BIRCHER detector rotation and BIRCHER sliding door and BIRCHER revolving door collision protection rides along the edge and the choice of voltage protection.They can also be used for small area, such as the kitchen and food and the service sector in the hospitality industry.