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  • Multi-Wavelength Pyrometers

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Multi-Wavelength Pyrometers Technology:

Some materials can be difficult or near impossible to measure with precision using single-wavelength or ratio pyrometers because of their complex emissivity characteristics. These types of materials are called non-greybody materials and their emissivity varies with wavelength. Multi-wavelength pyrometer technology is the perfect solution for measuring the temperature of these difficult materials


mutli wavelength pyrometer surface emissivity characteristics

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Multi-Wavelength Pyrometers

MW pyrometers are best for non-greybody materials as they are able to accurately correct for emissivity variations due to:

  • Changes in alloy, surface texture, surface oxidation
  • Abnormal operating conditions such as a furnace leak, bad roll, or reheated coil (Annealing Line)

With an MW pyrometer, consistent and accurate readings are achieved under a wide range of operating conditions, with no sensor adjustments.

MW pyrometers also have a real-time measure of emissivity, confirming valid temperature measurement conditions and alerting you of invalid conditions that require troubleshooting.


Multi-Wavelength Comparison Chart

Popular Multi-Wavelength Applications

  • Aluminum & Copper: Extruded Surface, Rolled Surface, Cast Surface, Sheared Surface, Forged Surface, Brazing Operations, Coating Preheat, Dies & Molds
  • Steel & Zinc: Cold Rolled Steel, High Alloy Steels, Electical Steel, Zinc-Coated Steel, Shot-Blasted Pipe, High Strength Bearings, Motor Rotors
  • Other: Glass Molds and Plungers, Magnesium Strip, All Other Non-Greybody Materials Listed Above