ENVEA - Model PCME DM 170 - Backscatter Dust Measurement
DM 170 is a backscatter particulate measurement sensor for measuring dust concentrations.
is designed to comply with the TÜV suitabilit...
- is designed to comply with the TÜV suitability testing scheme to EN 15267
- for measuring dust concentrations in a wide range of industrial applications
- may be used in combustion applications as well as in higher dust loading applications
- ideally suited for process opimisation applications
- ProScatter Backscatter sensor technology with superior minimum detection level as low as 1 mg/m3
- manual and remote Zero and Span (reference) checks available to ensure optimal instrument performance
- purge Flow Fail Sensor and Optical Shield options
- non-intrusive system designed to operate in non-condensing stack environments
- contamination risks are further reduced due to single-side stack installation where critical optical components remain outside the stack
- offers a more reliable PM dust measurement as an alternative to opacity and scintillation
Use
The DM 170 is well-suited for use in medium to large stacks and is suitable for low to high dust concentration measurements, regardless of dust velocity or charge. Typical applications include:
- Continuous Emission Monitoring (CEM) relative to Emission Limit Values (ELV) in Power Plant, Boiler and Metal Smelting applications
- Filter performance monitoring in Metal, Mineral and Chemical plant
Function
The DM 170 is based on PCME’s class-leading ProScatter Backscatter technology.
Particles in the stack are illuminated by a laser and the amount of laser-light scattered back from the particles is measured by a detector. Stray scattering and ambient light are eliminated by tuning the instrument’s field-of-view and by use of a modulated laser source. The instrument response is proportional to dust concentration.
It can be calibrated to provide a mg/m3 measurement by comparison to results of a standard reference (isokinetic) test. With the ability to measure dust levels as low as 1 mg/m3, the DM 170 can be used in applications where emissions are well below the sensitivity limit of traditional Opacity instruments.
Technical Data
Process / Application conditions:
- Application suitability: Suitable for measurement in non-condensing flue gases
- Location suitability: Outdoor or sheltered use; safe for ambient temperature of -20 to 50 °C
- Flue gas temperatur (at monitoring point):
- -20 °C to 250 °C
- option: up to 400 °C
- Stack pressure: ± 20 mbarG
- Stack diameter (application specific): 1.5 - 15 m
- Flue gas composition: Non-condensing
- Hazardous zone classification: ATEX Zone 2/22
- Stack connection:
- 3' 150 lb ANSI flange
- DN80 PN10/PN16 flange
- JIS 100-5k, -10k flange
Air pure requirements
- Requires an externa supply of 1000 l/min of dry, clean (oil-free) air.:
- Type: Medium purge blower
- Power supply voltages (options):
- 110 V AC, 50/60 Hz, 7 A
- 230 V AC, 50/60 Hz, 2.3 A
- Blower tubing: 3 m hose with fittings (supplied)
- Air filter: Standard (included)
- Noise pressure level: <80 dBA
- Cable entries: 1x M20 cable gland
Measurement information
- Measurement type: Light scattering
- Resolution: 0.1 mg
- Response time: 2 seconds
- Dust levels: <1 to 1000 mg/m³
Sensor options
- Sensor versions:
- Standard sensor up to 250 °C
- High temperature sensor up to 400 °C
- Sensor material: 316 stainless steel
- Sensor dimensions: L 354 x H 216 x B 204 mm (14 x 8.5 x 8 in), including flange and cable glands
- Zero/Span sensor checks: Included
- Protection rating: IP 65
- Power supply voltage: 100 – 240 V AC 50/60, 1 A
- 24 V DC
- I/O:
- Outputs: 1x 4 ... 20 mA
- 2x alarm relays
- 1x RS-485 output
- Inputs: 1x digital input
- Manual audit capability: Single, compact unit (available in a selected range of dust concentrations)
- Automatic air purge failure check: Option
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