Concentration measuring instrument D-R 909

dustlaserindustrial

Wet stack dust monitor suitable for particulate measurement after wet scrubbers, Flue Gas Desulfurisation (FGD) plants, Wet Electro-Static Precipitators (WESPs) and other processes where the flue gas falls below dew point. Highly reliable PM CEMS monitor, used for continuous extractive measurement of dust contents in wet and sticky exhaust gases. Offers compliance with international standards such as US EPA 40 CFR 60 PS 11, EN 15267, EN 14181 (QAL 1 certified), UL 61010-1 (cETLus certified), etc.

Benefits:

• Suitable for regulatory emission monitoring: The D-R 909 meets international standards and certifications (such as EN 15267 / QAL1, US EPA), making it fully approved for use in legally compliant emission monitoring system. It ensures accurate and traceable measurements, as required for environmental reporting and regulatory compliance.
• Reliable measurement of small dust concentrations: Certified for the range 0-7.5 mg/cm3, the lowest achievable on the market, the D-R 909 provides precise and stable readings even at very low particulate concentrations. This makes it ideal for modern high-efficiency plants with advanced filtration systems or low emission levels.
• Simple and flexible installation: The compact, probe-mounted design allows for quick and easy installation on various types of stacks and ducts. Its modular concept and adaptable mounting options ensure smooth integration into both new and existing monitoring setups.
• Designed for harsh installations and climate conditions: The D‑R 909 is approved for an exceptionally wide ambient temperature range of -40 °C to +60 °C, ensuring reliable operation in cold outdoor stacks, exposed platforms and warm industrial environments. This capability exceeds the –20 °C to +50 °C envelope of typical wet‑stack particulate CEMS, offering greater flexibility for global deployment.
• Lower‑temperature heated sampling: The D‑R 909 uses a heated sampling probe (up to 160 °C) to evaporate water droplets directly in the probe, eliminating the need for high‑temperature oven systems and heated sampling lines used by other wet‑stack monitors. This delivers reliable droplet removal with less energy, simpler installation, and reduced component stress.
• Reduced service and operating costs: The optical system features an automatic self-check and purge-air cleaning, minimizing maintenance needs and ensuring long-term reliability. With no moving parts and robust construction, the D-R 909 offers excellent cost efficiency over its service life. No need to wait for vaporizing oven to cool down for cleaning and maintenance.
• Proven performance under real‑world power‑plant conditions: Certification suitability was demonstrated in a 12‑month field test at a power plant, substantially longer than the 3‑month field test used for other equipments on the market. This provides a 6 months maintenance interval significantly longer than other suppliers to provide strong real‑world evidence of long‑term stability, measurement reliability and resistance to challenging wet‑gas conditions.

Compliance & certifications

• QAL1 certified in accordance with EN 15267 and EN 14181 (TÜV & MCERTs)
• Compliant with US EPA 40 CFR 60 PS 11
• cETLus according to UL 61010-1 (UL-listed)
• Automatic control functions, high availability and low service and operating costs

Typical applications:
The D-R 909 particulate CEMS is ideally suited for compliance dust emission monitoring in challenging industrial environments, especially where wet or high moisture flue gases make conventional monitoring difficult. It is particularly effective in the following contexts:

• Air pollution control systems
• Coal- and oil fired power plants with Wet FGD
• Waste incineration plants with wet scrubbers
• Energy from waste, biomass and SRF/RDF fired boilers
• Pulp and paper recovery boilers
• Metallurgical and chemical processes using wet scrubbers
• Sugar beet pulp dryers and boilers
• Fertilizer production plants
• Wood processing (particleboard and fibre dryers)