The device operates according to the backscattering principle. The light of a laser diode illuminates the dust particles in the measuring volume of the flue gas duct. The light reflected by the particles is measured and evaluated.

The D-R 320 does not require a light trap. The background light in the stack is detected by means of a special optical system with an integrated dual detector and automatically compensated without manual adjustment.

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.

Control functions

The D-R 320 automatically performs zero and span check as well as contamination check at regular intervals and on demand. The device features an automatic contamination correction. Need for maintenance is immediately indicated by the electronics.