The DURAG D-R 320 is a scattered light dust monitor that detects the lowest to medium dust concentrations in dry flue and process gas.
The D-R 320 is based on the back-scattered light principle – the light of a red laser diode illuminates the dust particles in the measuring volume of the flue gas duct. The light scattered backward by these particles is detected and evaluated.
A unique feature of the D-R 320 is the automatic background light compensation with means of a patented optical system with dual detector. This allows for an easy and quick installation without any adjustment. A light trap is not required.
Key Benefits
- single sided installation on a standard flange
- easy startup without adjustment
- automatic background light compensation without light trap
- automatic zero and reference point check
- automatic contamination control and correction
- integrated purge air regulation and purge air control
- minimum maintenance
- EN 15267 certified
- digital interface according to VDI 4201-3
Applications
- Continuous emission monitoring, e.g: on incineration plants generally
- on plants according to IED 2010/75/EU
- on waste, hazardous waste and sewage sludge incineration plants
- on cement manufacturing plants
- on power plants with gas, oil, coal or co-firing
- on plants for the incineration of biomass
- Monitoring of: ventilation units, filter units.
Download Specifications
TECHNICAL DATA
| Measuring principle |
Backward scattering, single-sided installation, contactless and in-situ measurement |
| Measuring variable |
Stray light units, calibratable as dust concentration in mg/m³ |
| Measuring range |
Minimum 0 … 5 mg/m³Maximum 0 … 200 mg/m³ |
| Certified measuring range |
0 … 7.5 mg/m³ |
| Ambient conditions |
Installation location: Indoor or outdoor installation**Temperature: -40 … +60 °C-30 … +60 °C (ATEX)-20 … +60 °C (IECEx) |
| Operating conditions |
In duct:Temperature: Maximum 600 °CRelative humidity: 0 … 95%, non-condensingRelative pressure: -50 … +50 hPa -50 … 0 hPa (ATEX/IECEx) |
| Dimensions |
Inner duct diameter: Minimum 0.7 mWall thickness: Maximum 0.56 m |
| Interface* |
Analogue output: 1x 4 … 20 mA, maximum 400 Ohm, potential-free (various parameters adjustable)Digital output: 2x NC/NO, maximum 60 VDC, 30 VAC), 0.5 A (various parameters adjustable)RS 485 Modbus RTU, USBStatus display: LED |
| Operation and display |
Software D-ESI 100*** orOperating unit D-ISC 100 |
| Check functions |
Automatic zero point and reference point measurement, automatic contamination measurement and compensation, integrated purge air monitoring and control |
| Protective functions |
Integrated fail-safe shutter (optional) |
| Light source |
Laser, class II, < 1 mW at 650 nm |
* Additional interfaces with D-ISC 100 operating unit
** Weather protection cover required for outdoor installation
*** Enables remote access via web interface, PC with Windows operating system required
