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Explore ServiceDURAG · D-R 290
DURAG D-R 290 Dust and Opacity Monitor
Continuous, contactless dust and opacity measurement at medium to high concentrations in dry flue and process gases, also suitable for difficult plant conditions.
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Testing capabilities
- Continuous, contactless in-situ dust measurement (transmission principle)
- Smallest certified measuring range 0 … 15 mg/m³
- Automatic measurement and correction of contamination
- Automatic zero point and reference point check functions
- Maintenance and linearity check without disassembly
- Developed to comply with US EPA 40 CFR Part 60, PS 1, PS 11 and ASTM D6216-20 Annex A1
- Suitable for flue gas temperatures up to 1,000 °C (optional)
Manufacturer-published capabilities. Available tests depend on the selected configuration and accessories. Confirm suitability, availability and pricing with our technical team.
Technical specifications
| Manufacturer / model | DURAG / D-R 290 (also D-R 290 Ex) |
| Measuring principle | Transmission, contactless and in-situ measurement |
| Measuring variable | Extinction, opacity, calibratable as dust concentration in mg/m³ |
| Opacity range | Minimum 0 … 20 %, maximum 0 … 100 % |
| Extinction range | Minimum 0 … 0.1, maximum 0 … 2.0 |
| Dust concentration range | Minimum 0 … 80 mg/m³, maximum 0 … 4,000 mg/m³ |
| Certified measuring range | 0 … 15 mg/m³ |
| Duct conditions | Max. 250 °C (optional 1,000 °C); 0 … 95 % RH non-condensing; −50 … +20 hPa |
| Inner duct diameter | 0.5 … 18 m |
| Ambient temperature | −40 … +60 °C (−30 … +60 °C ATEX, −20 … +60 °C IECEx) |
| Interfaces | 1× 4 … 20 mA, 2× relay outputs, RS 485 Modbus RTU, USB, LED status |
| Light source | LED, 450 … 680 nm |
| Explosion protection | ATEX and IECEx variants available |
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