Robust Linear Sensor for Paper Machine

Tape position controlling in a paper machine

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Producing 1500 meters of paper, with a width of 9 meters every minute: that is the capacity of today’s paper making machines. It’s a lot of paper moving at a very high speed. Pulp goes into the machine and is fed onto a tape. The temperature in the machine is at 90 degrees Celsius constantly. The constant high temperature dries the pulp, the pulp becomes strong and leaves the paper machines as paper.

Inductive Sensors for a damp and high temperature environment

It sounds like a simple process, but a manufacturing paper is extremely complex. Tight controlling of the process is necessary to guarantee superb paper quality. Controlling the position of the tape that carries the drying of the pulp across the fast spinning rollers is crucial in order to prevent breakages. 

A Paper Manufacturer needed a sensor to determine the position of the tape and passes it to the PLC (programmable logic controller). The whole paper machine is 300 meters long, 9 meters wide and is about 15 meters high. The machines run 24 hours a day, breakages are very expensive. 

Paper Machine Automation

Our engineer co-operated with the paper factory from the start and developed a custom made sensor solution. The challenge was to find a (stainless steel) sensor that can operate in a damp and high temperature environment over a long period of time.

Advantages P101 Linear Inductive Position Sensor

  • Perfect for use in the paper and pulp industry
  • Durable and robust stainless steel body
  • A loop powered two-wire 4-20mA output
  • High accuracy stand-alone linear inductive position sensor
  • The overall performance, stability, and repeatability are outstanding over a wide temperature range
  • Accuracy of ± 0.25% FS
  • Vibration proof
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