Processing Magazine

Multi-wavelength Infrared Temperature Sensors

May 30, 2012

Williamson Corporation’s Pro 100 and Pro 200 Series multi-wavelength infrared temperature sensors are ideal for a multitude of industrial applications where devices such as thermocouples and RTDs would be inaccurate, too slow or difficult to use. In challenging conditions, such as dirty windows, smoke, steam, plasma coatings, dust, water spray, partially obstructed fields of view, or small or wandering targets, these sensors outperform all others. Pro 100 and Pro 200 multi-wavelength sensors use ESP algorithms to provide “aim-and-read” capabilities for non-greybody materials (annealed, galvannealed and stainless steel; aluminum; brass; copper; zinc; etc.) that are not accurately measured by single- or dual-wavelength sensors because their change in emissivity varies by wavelength. The sensors measure the amount of infrared energy emitted by an object’s surface, then convert this signal into a temperature value between 95 and 2500 C. Accuracy is within 2 C or 0.25% of the reading (whichever is greater).