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DURAG GROUP
Dust Monitor for Wet Stacks

Dust Monitor for Wet Stacks

Product catalog summary

Overview: The DURAG D-R 909 is an extractive wet stack particulate monitor designed for high-quality monitoring of low to medium particulate concentrations in wet flue gas flows. It is certified and compliant with various international standards, ensuring its suitability for regulatory emission monitoring.

Certifications and Compliance: The D-R 909 is QAL1 certified according to EN 15267 and EN 14181, compliant with US EPA 40 CFR 60 PS 11, and cETLus certified according to UL 61010-1. These certifications make it a legally compliant emission monitoring system.

Key Features:

Automatic Control Functions: Offers high availability and low service and operating costs.
Reliable Measurement: Certified for measuring dust concentrations as low as 0-7.5 mg/cm³, providing precise readings even at low particulate levels.
Installation Flexibility: Compact, probe-mounted design allows for easy installation on various stacks and ducts.
Harsh Environment Suitability: Operates in temperatures ranging from -40°C to +60°C, suitable for diverse climate conditions.
Lower-Temperature Heated Sampling: Uses a heated sampling probe to evaporate water droplets, reducing energy use and installation complexity.
Cost Efficiency: Features an automatic self-check and purge-air cleaning system, minimizing maintenance needs.

System Components and Configurations:

Includes a measuring unit, supply unit, sampling probe, and optional D-ISC 100 operating unit.
Supports Modbus RTU/TCP for remote access and control.
Installation configurations allow for distances up to 1,000 meters between components.

Technical Specifications:

Measuring Principle: Forward scattering, extractive, continuous, single-sided installation.
Measuring Range: Minimum 0-5 mg/m³, maximum 0-200 mg/m³.
Ambient Conditions: Suitable for indoor or outdoor installation with weather protection.
Power Consumption: Maximum 2,300 VA.
Degree of Protection: IP54 according to EN 60529.

Additional Information: The D-R 909 has been proven in a 12-month field test, demonstrating long-term stability and reliability under real-world conditions. It offers a 6-month maintenance interval, longer than typical systems.

Catalog excerpts

DURAG GROUP • QAL1 certified in accordance with EN 15267 and EN 14181 (TOV & MCERTs) • Automatic control functions, high availability and low service and operating costs

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ONE COMPANY | comprehensive solutions • Local support, global reach: benefit from local commissioning and services through our extensive network of partners and corporate organizations, ensuring prompt assistance and expertise wherever you are. There's no need to send the device back to factory. • One company, comprehensive solutions: DURAG GROUP offers a comprehensive solution for your plant, from combustion optimization and safety to the environmental compliance and atmospheric impact. FEATURES AND BENEFITS • Suitable for regulatory emission monitoring The D-R 909 meets international standards...

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* Additional interfaces with D-ISC 100 operating unit ** Weather protection required for outdoor installation. Indoor installation for cETLus version. *** Enables remote access via web interface, requires PC with Windows operating system D-R 909 SU | SUPPLY UNIT (DIMENSIONS AND WEIGHT)

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DURAG GROUP (Headquarters) Kollaustr. 105 22453 Hamburg, Germany Phone +49 40 554218-0 [email protected] © DURAG GROUP 03/2026 | Subject to change

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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