The dual air bearing caliper sensor is based on the measurement of magnetic resistance. The air cushions attached to the sides stabilize web flutter and minimize the accumulation of dirt on the sensor elements. The upper and lower sensor air cushions can be precisely set and thus ensure a minimal distance from the paper web. The sensor has an integrated diagnostic function and covers a wide measurement range from 150 μm to 2,500 μm. In addition, the measurement delivers precise and reliable profile control all the way to the edge of the paper web.
The dual air bearing caliper sensor is used for caliper measurement of the paper web and is suitable for a wide grade range of coated and uncoated board.