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

The automatic background compensation via a patented optical system with integrated double detector is the unique feature. This enables quick and easy commissioning without adjustment. A light trap is not required.

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

The connected equipment is easy to configure and operate using the D‑ISC 100 control unit. 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.