Durag Group D-R 820 F Dust Monitor

The DURAG D-R 820 F is a dust monitor designed for the extractive measurement of wet flue gases and wet process gases where facilities need reliable monitoring of small to medium dust concentrations. Using a forward scattering measuring principle, the D-R 820 F is engineered for applications where moisture in the gas stream makes in-situ dry gas dust measurement less suitable. DURAG positions the system for continuous emissions and process monitoring in wet gas conditions.

A key advantage of the D-R 820 F is its combination of sample dilution, hyperkinetic gas extraction, and heating for water evaporation before measurement. This design helps support stable dust measurement in wet gas streams while reducing the impact of moisture on measurement reliability. DURAG also highlights automatic zero point and reference point checks, automatic contamination measurement and compensation, and a local control panel with LC display to simplify operation and maintenance.

Available in Canada through Westech Industrial, the D-R 820 F fits well within Westech’s emissions monitoring offering for industrial customers who require dependable dust monitoring in challenging wet flue gas or process gas applications. Westech supports customers across Canada with product support and industrial monitoring solutions.

D-R 820 F Dust Monitor

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PRODUCT FEATURES

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Description

  • Extractive dust measurement for wet flue gases and wet process gases
  • Forward scattering measurement principle
  • Dilution of the sample
  • Hyperkinetic gas extraction
  • Single-sided installation on the stack
  • Automatic zero point and reference point checks
  • Automatic contamination measurement and correction of measured values
  • Local control panel and LC display

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Manufacturer Info

The DURAG Group is a global provider of intelligent solutions for process and environmental monitoring, combustion and safety monitoring, gas analysis, and continuous emissions monitoring systems. With decades of industry experience, DURAG supports safer, more efficient, and more sustainable industrial operations.

Website: https://www.durag.com/

SPECS

Measuring principle:
Extraction of sample gas, dilution and heating for evaporation of H2O, forward scattering, single-sided installation
Measuring variables:
Stray light units, calibratable as dust concentration in mg/m³
Dust measuring range
Minimum 0 … 15 mg/m³, maximum 0 … 200 mg/m³
Certified measuring range:
range: 0 … 15 mg/m³
Ambient conditions:
Indoor or outdoor installation, -20 … +50 °C
Operating conditions in duct:
-25 … 220 °C
In-duct temperature:
Maximum 600 °C
Relative humidity
> 95%, maximum 30 g/m³ H2O as aerosol
Relative humidity in duct:
0 … 95%, non-condensing
Relative pressure:
-30 … +2 hPa
Minimum inner duct diameter:
0.4 m
Analog outputs:
4 x 4 … 20 mA
Digital outputs:
4 x NC/NO
Light source:
Laser diode, red, 650 nm

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PRODUCT FAQ's

What is the DURAG D-R 820 F used for?
The DURAG D-R 820 F is used for the continuous measurement of small to medium dust concentrations in wet flue gases and wet process gases. It is designed for applications where moisture in the gas stream requires an extractive measurement approach.
How does the D-R 320 measure dust?
The D-R 320 uses a backward scattering measuring principle. It measures stray light and can be calibrated to display dust concentration in mg/m³.
How does the D-R 820 F measure dust in wet gases?
The D-R 820 F extracts the sample gas, dilutes it, and heats it to evaporate water before measurement. It then uses a forward scattering measuring principle to determine dust concentration.
What makes the D-R 820 F suitable for wet flue gas applications?
Its design combines sample dilution, hyperkinetic gas extraction, and heating for moisture removal, which helps support stable measurement in wet gas streams where condensation and aerosols can affect other measurement approaches.
What are the benefits of the D-R 820 F for plant operators?
DURAG highlights benefits including suitability for plants with variable gas velocity, long service life due to a stable laser light source, and easy commissioning, adjustment, and maintenance without a PC.
Can Westech Industrial provide support for the D-R 820 F in Canada?
Yes. Westech Industrial supports customers across Canada with product support and industrial monitoring solutions. Westech can assist with product selection and help customers apply the right dust monitoring solution for their emissions or process application.