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DM 401

DUST OPACITY MONITORING SYSTEM. Double pass opacity monitor. Continuous In-Situ measurement.

  • Direct continuous measurement across stack
  • Small, lightweight & low operating costs
  • Simple installation, commissioning and operation
  • No moving parts – minimal maintenance
  • PC based setup, control and data logging
  • Long-life green LED source
  • High measuring accuracy
  • Opacity or mg/m3 (*) after on site calibration according to VDI 2066
Measuring ranges
Opacity 0 … 100 % opacity
10 … 1,000 mg/m3 dust
(after on site calibration according VDI 2066)
Dimensions and other data
Data transmission galvanic isolated 4-20mA analog output
RS485 with Modbus RTU protocol
PC-Interface USB or RS485
Media only for non condensing flue gas
Accuracy +/- 2 %
Housing Aluminium die cast
Power supply 22…24 Vdc / 20W
Protection class IP 65
Weight appr. 10.72 lbs
Download File type File size
DM 401 US-Brochure PDF 439 KB Download
DM 401 Questionnaire DOC 136 KB Download