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NEO Monitors LaserDust - Model MP, LP, XLP -Medium Path, Long Path & Extra Long Path Monitors
LaserDust™ Medium Path (MP), Long Path (LP), and Extra Long Path (XLP) Monitors are compact, optical dust monitors for true continuous in-situ measurement of dust concentration or opacity. The monitors are designed for measurement across pipes, stacks and ducts with typical path lengths of 0.5 – 10 m. LaserDust™ Monitors use a transmitter/receiver configuration to measure the dust concentration along the optical line of sight. Our true non-contact approach is superior to point type dust meters. With innovative laser technology the LaserDust™ combines two measurement principles in one instrument.
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- At low dust levels it operates with forward scattered light technology:
The incident laser light is scattered by dust particles and collected onto a solid-state sensor for dust quantification. This highly sensible mode enables detection limits of < 0.5 mg/Nm3 and is unaffected by dust depositing on the windows. - At high dust levels the LaserDust™ will measure transmittance or opacity:
Light absorption by dust particles is captured by a 2nd sensor.
- Can measure dust concentration or opacity
- Response time down to one second
- Suitable for high temperatures
- Cross stack measurement up to 10 m
- High dynamic range (mg or g with one instrument)
- Scattered light detection for high sensitivity
- Non-contact measurement
- No moving parts
- Response time down to one second
- Suitable for high temperatures
- Cross stack measurement up to 10 m
- High dynamic range (mg or g with one instrument)
- Scattered light detection for high sensitivity
- Non-contact measurement
- No moving parts
- Aluminum smelters and steel works
- Waste incinerators, power plants or cement kilns
- Scrubber and filter optimization
- Bag house filter surveillance
- Dust explosion prevention
- …and more
- In-situ monitoring
- Highly reliable real time analyzer
- Low maintenance cost
- Reduce emission to the environment
- Easy to install and operate
- Reduce daily operation costs
- Optimize process
- Well proven measurement techniques
- Process temperature: Above dew point up to 700 º C
- Process pressure: 0.1 – 1.5 bar abs (optional windows for up to 5 bar)
- Detection limit: < 0.5 mg/Nm3 (in scattered mode)
- Measurement range: min. 0 – 15 mg/Nm3 (scattered mode), particle size >1micron max. 0 – 10.000 mg/ Nm3 (transmission mode), particle size >1micron
- Resolution: 0.05 mg/Nm3
- Optical path length**:
- MP: 0.5 – 3 m
- LP: 3 – 6 m
- XLP: 6 – 10 m
- Response time: 1 – 2 sec
- Pulse mode: 50 ms
Environmental conditions
- Operating temperature: -20 º C to +55 º C
- Storage temperature: -20 º C to +55 º C
- Protection classification: IP66
Inputs / Outputs
- Analog output: 4 – 20 mA current loop (concentration, transmission)
- Digital output: TCP/IP, MODBUS, Optional fibre optic
- Relay output: High dust-, Warning - and Fault relays (normally closed-circuit relays)
- Analog input: 4 – 20 mA process temperature and pressure reading
Ratings
- Input power supply unit: 100 – 240 VAC, 50/60 Hz, 0.36 – 0.26 A
- Output power supply unit: 24 VDC, 900 – 1000 mA
- Input transmitter unit: 18 – 36 VDC, max. 20 W
- 4 – 20 mA output: 500 Ohm max. isolated
- Relay output: 1 A at 30 V DC/AC
Installation and Operation
- Flange dimension:
- MP: DN50/PN10
- LP: DN80/PN10
- XLP: DN150/PN10
- Optional ANSI or other sizes on request
- Alignment tolerances: Flanges parallel within 1.5º
- Purging of windows: Dry and oil-free pressurised air or gas, or by fan
- Purge flow: 50 – 100 l/min (application dependent)
Maintenance
- Visual inspection: Recommended every 6 – 12 months (no consumables needed) Remote instrument check by Ethernet connection or external modem possible
- Calibration: Recommended every 12 months (against gravimetric analysis)
- Validation: Integrated zero and span check
Safety
- Laser class: Class IIIb according to IEC 60825-1
- CE: Certified
- EMC: Conformant with directive 2014/30/EU
Explosion protection (optional)
- IECEx/ATEX zone 2: II 3 GD T100 °C Ex nA nC II T5
Dimension and weight
- Transmitter unit: (MP, LP, XLP) 200 (plus 100 for purge unit) x 270 x 170 mm, 6.2 kg
- Transmitter unit: (Ex version) 200 (plus 100 for purge unit) x 270 x 310 mm, 7.9 kg
- Receiver unit (MP): 300 (plus 100 for purge unit) x 120 x 120 mm, 3.9 kg
- Receiver unit (LP): 380 (plus 100 for purge unit) x 120 x 120 mm, 5 kg
- Receiver unit (XLP): 410 (plus 100 for purge unit) x 270 x 170 mm, 8 kg
- Power supply unit: 180 x 85 x 70 mm, 1.6 kg
** Other OPLs on request