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What is Emissivity and Reflectivity?

What is Emissivity and Reflectivity?

by Kam Olaogun | Dec 11, 2019 | Emissivity, Pyrometer, Temperature Measurment, Wavelength

What is Emissivity? Not all surfaces are the same. Depending on what you’re pointing your infrared temperature sensor at you’re likely to get variations in emitted infrared energy. This variation is called emissivity. Emissivity is a measure of a material’s ability to...
The Difference Between Two-Color and Dual-Wavelength Pyrometers

The Difference Between Two-Color and Dual-Wavelength Pyrometers

by Kam Olaogun | Oct 14, 2019 | Pyrometer, Wavelength

Editor’s Note: This blog post was originally published in 2015 and has been updated for accuracy and relevance. In the world of infrared temperature sensors, there are two types ofratio pyrometers: Two-Color (TC) and Dual-Wavelength (DW). Both use a ratio of...

Why Should I Use an Infrared Pyrometer to Measure Temperature in My Process

by Kam Olaogun | May 30, 2019 | Pyrometer, Wavelength

Infrared pyrometers are excellent devices to use when a direct contact measurement may not be possible. Often times the things we are trying to measure are simply too hot for contact devices like thermocouples or resistance thermometers. In addition, the things we are...
Williamson Hot Slug Detector (HSD) for Fiberglass Batting

Williamson Hot Slug Detector (HSD) for Fiberglass Batting

by Jonathan Stronach | Jun 28, 2017 | Application Note, Pyrometer, Wavelength

Hot Slug Detector: Hot slugs form when a process upset causes molten glass to fall from the spinner and into the product during the manufacturing of fiberglass batting. Surrounded by insulating material, these hot slugs remain hot, and days later can cause the paper...
Compensating for Optical Obstructions and Emissivity Variation with Single-Wavelength Sensors

Compensating for Optical Obstructions and Emissivity Variation with Single-Wavelength Sensors

by Jonathan Stronach | Jan 18, 2017 | Wavelength

Williamson Short-Wavelength Advantage Infrared pyrometers rely on making a reading based on the amount of energy collected. The amount of energy collected can be affected by emissivity variance and optical obstructions. Selecting the shortest possible wavelength helps...
3 Infrared Technologies to Use in the World of Competitive Annealing

3 Infrared Technologies to Use in the World of Competitive Annealing

by Kam Olaogun | Aug 18, 2016 | Annealing, Pyrometer, Steel, Wavelength

Not all annealing lines have the same accuracy requirements. Some alloys require tighter temperature control than others. Plants that run high-strength steel or dual/complex-phase steel require precise control of steel temperature. Plants that run low-alloy steels for...
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  • The Best Way to Measure the Surface Temperature of a Metal
  • Does Emissivity Change with Temperature?
  • What is Emissivity and Reflectivity?
  • Are Non-Contact Thermometers as Accurate as Contact Thermometers?
  • What Temperatures Ranges Do Infrared Thermometers Accurately Measure?

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