Basic IR knowledge: Wavelength matters

The wavelength of an infrared emitter has a major influence on the efficiency of a thermal process. The better the emitted wavelength fits the absorption spectrum of the material to be heated, the more efficient the process.

Basic IR knowledge: Wavelength matters

For instance, water absorbs best at about 3000 nm. Therefore, medium-wave and carbon infrared (CIR) emitters are optimal to heat water and water-based coatings. The main emission of these emitters lies exactly within the range of the main absorption of water. Another important emitter parameter is power, measured in W/cm (emitter length) or W/cm2 (heated surface). Due to the higher temperatures of the heating filaments, the power density of short-wave or halogen emitters is in most cases higher than that of medium-wave infrared emitters.

There is more IR basic knowledge on our technical CD / USB. Request a free copy here.

See for yourself how the correct wavelength improves your processes in our application examples:

Infrared booster speeds up manufacture of metal housings

So far, metal compressors for small cooler units have been cured with long wave infrared emitters. The emitters were replaced with medium wave twin tube emitters from Heraeus. In addition, a so-called infrared booster with high-power, short wave emitters was fitted in the line in front of the oven. The booster is used to bring the product quickly to the correct temperature.

Read our application example!

Energy-efficient drying for high-speed printing heads

The use of carbon infrared emitters (CIR) enabled The Lettershop Group in Leeds to achieve the speed required for drying that their high-speed printing heads need.

Read our application example!

Infrared heat dries anti-slip coating on paper

A carbon infrared system from Heraeus Noblelight is helping Orvec International to achieve the quality of non-slip coating required on disposable tray mats to meet the stringent demands of major passenger airlines.

Read our application example!

to top