Infrared sensors

Infrared transmission / reflection – Measurement of moisture, basis weight, thickness

By means of optical evaluation of the reflected light energy in the near-infrared range (NIR), important product-specific parameters such as moisture (water), coating weight, thickness, and organic components in the web can be measured during the manufacturing process.

Its non-nuclear measurement technique is very selective and offers an accurate and cost-effective measurement solution that can be supplied in either single-sided reflection, or dual-sided transmission modes.


Wilot WMR

Measurement of product width


Reflexion of infrared light

Automatic width measurement on a running product web. IR LEDs used in reflective mode continuously and precisely determine the product width. The sensor module only needs to be attached on one side of the product. The compact design allows it to be installed even in the tightest mounting spaces. Retrofitting is possible virtually anywhere.

Product Highlights

  • Non-contact and continuous
  • Digital signal processing helps it determine product width with the utmost accuracy
  • Universal application

Customer benefits

  • High standard of repeatability
  • Homogenous product appearance
  • Documentation of product quality

IR LEDs used as retro-reflective devices determine the product width. The operator can set the sensitivity of the sensors from the included control panel, and specify the maximum and minimum product width for alarm functions. Since the sensor module only needs to be attached on one side of the product, mounting options are very flexible.

The unit consists of:

  • Sensor module
  • Electronics
  • Control panel
  • Digital display (optional)

The Wilot WMR is a reliable instrument for non-contacting, inprocess determination of the product width, especially at  the stenter delivery end. The Wilot WMR helps suppliers to maintain the quality specifications of their customers and reduce costs from scrap and quality problems.

The system is very versatile. Stenters and levelling stenters represent the main application areas.


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