RELIABLE TECHNOLOGY AND CONVENIENT OPERATION
DR-220 Dust and Optical Opacity Monitor operates under a contactless measurement process according to the transmission principle. The D-R 220 functions using the double-pass method according to the auto-collimation principle. In other words, the light beam emitted by the transceiver crosses the measuring path twice. Consequently, the attenuation of the light beam by the dust in the measuring section is detected and evaluated (a long-life LED is used as a light source).
The D-R 220 is one of the smallest monitoring device on the market and the most cost effective DURAG dust monitor. Operating the D-R 220 is very convenient, cost effective and easy to use.