DURAG Group stands as a premier global manufacturer and innovator of high-precision environmental monitoring systems, specialized dust monitors, and optical opacity detection technologies. Globally recognized for engineering highly certified, ultra-reliable optical and scattered-light instrumentation, DURAG excels in capturing particulate matter under the most challenging process conditions—including high-velocity flue gases, extreme thermal cycles, and corrosive stack environments. Their comprehensive portfolio is purposely built to deliver absolute compliance verification and operational transparency, helping facilities strictly adhere to environmental regulations while optimizing combustion and filtration efficiencies.
By focusing on meticulous optical calibration, regulatory compliance standards, and rugged hardware execution, DURAG ensures that minute particulate changes are tracked with absolute stability. Choosing DURAG environmental monitoring infrastructure provides heavy industrial facilities with access to a world-class lineup of continuous emission monitoring systems (CEMS), backed by deep technical application knowledge and local lifecycle support to safeguard both your regulatory standing and local air quality.
In the realm of regulatory compliance monitoring, DURAG offers an extensive lineup of transmission-style opacity meters and dust monitors, highlighted by the industry-standard D-R 290 series. Utilizing a double-pass optical transceiver layout, these systems project a modulated light beam across the entire diameter of a stack or duct to measure light attenuation with exceptional resolution. Because they continuously calculate light transmittance and opacity, these devices provide the deterministic, real-time data required for official continuous emission monitoring (CEMS) compliance loops in large-scale power generation, cement manufacturing, and steel production plants.
For facilities operating high-efficiency fabric filters, baghouses, or wet scrubbers, measuring minute particulate leaks requires advanced optical physics. DURAG’s D-R 804 and forward-scattered light technologies project a laser beam into the gas stream to track light scattered by passing dust particles. This highly sensitive method captures microscopic particulate concentrations down to fractions of a milligram per cubic meter. By facilitating early detection of torn filter bags or scrubber malfunctions, these ultra-sensitive monitors allow plant personnel to execute proactive maintenance strategies before a minor leak escalates into an environmental exceedance or an unscheduled shutdown.
When stack conditions include water droplets, high saturation, or temperatures below the acid dew point, standard optical cross-stack monitors can suffer from optical distortion. To overcome this, DURAG engineers specialized extractive particulate monitoring systems, such as the D-R 820 F. This technology extracts a continuous sample of flue gas from the stack, vaporizes any liquid water droplets under controlled thermal conditions, and measures the remaining dry dust using a high-resolution scattered-light cell. This ensures uncompromised measurement integrity in difficult applications like wet flue gas desulfurization (FGD) plants and complex chemical waste incinerators.
Beyond physical optical sensors, DURAG excels in complete emission data logging and automatic system validation. Their advanced monitoring instruments feature integrated, automatic zero and span check mechanisms that utilize internal calibration filters to verify optical alignment without interrupting operations. Combined with advanced data acquisition controllers like the D-EMS2000 system, DURAG seamlessly translates raw optical signals into legally compliant environmental reports. This robust data architecture guarantees error-free communication with plant SCADA networks, providing environmental managers with secure, defensible proof of regulatory adherence.
Everest Automation is an authorized partner providing specialized application knowledge, expert technical support, and lifecycle services across Eastern Canada.
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