The device operates using the double-pass method according to the auto-collimation principle. The light beam traverses the measuring distance twice. The attenuation of the light beam by the dust content in the measuring section is measured and evaluated.

The universal control unit D-ISC 100 can be connected for the measured value display, which allows up to eight dust and flow-rate measurement instruments.

The connected equipment can be operated and configured conveniently using the D-ISC 100. The display provides an immediate overview of the current measured values and the status of the measuring instruments.