* DM 401 BROCHURE * Description Product Overview The DM 401 (short) is a double pass dust opacity monitoring system used for continuous in-situ measurement for use in a short optical path length 20" to 157" (0.5m to 4m) Features 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 Double pass opacity and dust monitoring system used for continuous in-situ measurement. Basic Equipment Direct continuous measurement across stack Small, lightweight & low operating cost Simple installation, commissioning and operation No moving parts – minimal maintenance PC based setup, control and data logging Long-life green LED source High accuracy Opacity or mg/m3 (*) after on site calibration according to VDI 2066 Technical Data Measuring ranges Opacity 0 … 100 % opacity10 … 1,000 mg/m3 dust(after on site calibration according VDI 2066) Dimensions and other data Data transmission galvanic isolated 4-20mA analog outputRS485 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
