Application Notes

Web Thickness Measurement

iconWeb Thickness App Notes.pdf

Regulating the thickness of a nonconductive fiber web across its width and length (rubber, paper, dough, plastic, particle board, etc.)

Maintaining a precise material thickness (±0.001 inch).

Making measurements in the presence of environmental contaminants.


Web thickness is controlled by the position of two calendar rollers. Kaman’s single-channel sensor is mounted on a shoe that slides across the web as it exits the rollers (see Figure 1). The sensor looks through the nonconductive web to measure the distance to a metal backing.

Kaman’s systems provide a DC analog signal directly proportional to the web thickness. Result: Improved web quality and reduced process costs

Good reasons to use the Kaman KD-2306/KDM-8206 measuring systems:

Non-contact. Using eddy current technology, the sensor can measure position without ever touching the target. The result is an extremely reliable system with no moving parts.

On-line. The sensor measures the web thickness as the material exits the rollers. A set point can be triggered to warn when out-of-tolerance conditions are reached.

Rugged. Kaman’s system components — the sensors and a NEMA-12 box used to house the signal conditioning electronics — are unaffected by environmental contaminants.

Versatile. The KDM-8200/8206 non-contact measurement is equally effective for particle board and plastics.

Accurate. The system passively compensates for the temperature shifts of the process environment.

Every application is unique.
Contact Kaman for application engineering assistance.

800-552-6267 | kamansensors.com | measuring@kaman.com      




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