September 6, 2012 - Metso releases IQ Optical Caliper sensor for low opacity papers.
The IQ Optical Caliper combines two accurate measurement techniques. The magnetic principle is used to measure the distance of the optical measurement to a reference plate while the non-contacting optical principle measures the distance to the paper surface. Paper thickness is reached by subtracting these individual measurements from each other. As well as the use of the blue light source to solve light penetration problem, the self cleaning construction of the sensor head eliminates one further difficulty experienced with conventional laser sensors.
Optical measurements have become accepted technology to avoid the sheet pinching effect experienced with contacting caliper measurements; but due to the conventional measurement technology, light penetration of the sheet can undermine accuracy with low opacity or porosity grades. Improved light scattering of shorter wavelength light and detection technology eliminates errors due to light penetration. And there are no pinching parts that could cause holes or sheet breaks.
Metso IQ is a combination of intelligent scanning, high-speed quality measurements, robust multivariable controls and the analysis toolbox unleashes a set of diagnostic capabilities that alert the operators to potential sources of problems and provides them with the necessary information online so they can run the machine better.