DURAG GROUP Transmission Principle

In some countries, measurement of opacity is required, for example in coal-fired power plants in the USA. This cannot be determined by the scattered light principle, but only by the transmission principle. In the transmission principle, a light source emits white light into the flue gas duct, which is reflected back by a reflector on the opposite side. Thus, it encounters dust particles that scatter and partially absorb the light, reducing its intensity. This value is measured by the detector and provides information about the dust concentration.
- Our products: D-R 220 & D-R 290
- Application: Continuous, contactless dust and opacity measurement at medium to high concentrations in dry flue and process gases.