MRU DM401 – Dust Opacity Monitoring System
Spesifications :
| Opacity | 10 … 100 % |
| Accuracy | +/- 2 % |
| Housing | Aluminium die cast |
| Protection | IP 65 |
| Weight | approx. 4,0 kg |
DM401 – Dust Opacity Monitoring System
Double pass transmission method for continuous particulates and opacity monitoring
The MRU DM 401 is a high-performance in-situ dust opacity monitoring system designed for continuous measurement of particulate concentration (mg/m³) and opacity (%) in industrial flue gas applications. Utilizing a double-pass transmission method with a modulated green LED light source, the DM 401 delivers accurate, stable, and maintenance-friendly monitoring—ideal for compliance and process control.
Key Features :
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Direct in-situ measurement in exhaust gas flow
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Measures 10–1,000 mg/m³ dust or 0–100% opacity
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Green LED source ensures long life, stable signal, and immunity to ambient light
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Stainless steel IP65 housing for harsh industrial environments
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No moving parts – reducing maintenance needs
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Integrated purge air system (blower or compressed air) to keep optics clean
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User-selectable output via 4–20 mA, RS485 (Modbus RTU), relay contacts
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On-site zero and calibration check for reliable, traceable results
Applications :
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Emission monitoring from industrial boilers, furnaces, and incinerators
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Baghouse filters, cyclones, or electrostatic precipitators
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General process control for dust-laden exhaust systems
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Any system requiring dust emission compliance with VDI 2066 calibration support
