DURAG D-R 320 Backward light scattering
For continuous, contactless measurement of low to medium dust concentrations in dry flue and process gases. Also suitable for corrosive gases and potentially explosive atmospheres.
Functionality: Backward scattering
Features :
- Continuous dust measurement
- Smallest certified measuring range 0 … 7.5 mg/m3
- Single-sided installation without optical alignment
- Automatic check functions
- Continuous, integrated purge air monitoring and control
- Maintenance and linearity check without disassembly
- Contactless measurement
Benefits :
- Suitable for official emission monitoring
- Reliable measurement of small dust concentrations
- Space-saving and easy installation
- Long life time and high availability under extreme plant conditions
- Low maintenance
Applications :
- Emission measurement of dry flue gases at the stack
- Temperatures up to 600 °C
- Corrosive flue gases, plants with complex gas matrix
- Measurement of dry process gases with small concentrations
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
