[ Ссылка ]

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 energy measured at two wavelengths to create a temperature reading. This method of measurement allows ratio sensors to automatically compensate for emissivity variation (for ‘greybody’ materials), partially filled fields of view, and dirty windows. While both the Two-Color and Dual-Wavelength are ratio pyrometers, the design and the capabilities of each type of pyrometer are very different.

Dual-Wavelength pyrometers use two separate and distinct wavelength sets on a filter wheel to measure the hottest temperature that is in their field of view. Because the design allows for separate wavelengths, these wavelength sets can be independently selected and combined to allow for some very unique capabilities. The most important capabilities being that you can select the wavelength sets to tolerate water, steam, flames, plasma and laser energy. This ensures a more accurate reading with the added bonus that they are more tolerant of scale, misalignment, and optical obstructions than Two-Color pyrometers. These features allow you to to get a consistent and accurate reading under a wide range of operating conditions without having to make adjustments to the sensor.

The difference in design allows for two major technical benefits for the Dual-Wavelength pyrometer:

1. Dual-Wavelength pyrometers are 20x less sensitive to scale & temperature gradients

2. Dual-Wavelength pyrometers can view through common industrial interferences

свернуть