Modular Stack Gas Monitor
Automatic monitoring of total mercury emissions (CEM) at different sites
Introducing the new
SM-4 mobile
- Easy to transport
- Qickly dismounted and reassembled
- Sample dilution directly at the probe: eliminates interference with virtually any sample matrix
- Maintenance free low temperature converter directly at stack: no transport of ionic mercury thus minimizing mercury adsorption
- Detects total mercury
(elemental, ionic and bound mercury) - Automatic calibration for elementary and ionic Hg
- Automatic quality control (QAL3) during operation
- Extremely wide range of measurement:
0,05 bis 1000 µg/m³
The SM-4 mobile by Mercury Instruments was developed on the basis of the well proven SM-4 Stack gas monitor. Its measurement principle and technique, its thermocatalytic reactor, the detector and the sample probe are identical with those of the stationary SM-4.
Due to its modular design, the SM-4 mobile can easily be transported, assembled and disassembled. It is the ideal solution for the determination of total vapor phase mercury emissions at varying sites.
Applications
- Coal fired power plants
- Waste incineration plants
- Sewage sludge incineration plants
- Cement kilns
- Recording of Hg-emission situations as well as determination of the efficency of
Hg-reduction techniques - Method 30A applications
- Testing of stationary CEMs
- Optimizing of mercury control technologies
An example:
Benefits of the SM-4 mobile
- Modular construction
- Easy to transport
- Thermo-catalytic sample gas treatment, no reagents needed
- Thermo-catalytic converter operating at low temperature (200°C)
- Sample gas dilution avoids interferences
- No generation of liquid waste or condensate
- Extreme high sensitivity: low measuring range is 0.05 µg/m³
- Heated particle filter with automatic cleansing
- Fast response: t(90) time typically 180 sec
- Length of sample line up to 100 meters
- Integrated source of calibration gas for ionic mercury
- Automatic quality control (QAL3)
- Maintenance free
System components
- Sampling probe with dilution and converter unit
- Probe controller box
- Heated bundle containing sample line, air supply line, calibration gas feed line
- Analyzer cabinet with detector and calibrator und Druckluftaufbereitung
- Air conditioning cabinet with pressure gauges, air filters, membrane dryer
SM-4 mobile:
Technical Specifications
Measured component:
Total mercury (ionic and elemental speciation as option)
Measurement principle:
Dilution probe with thermocatalytic converter at stack,
Amalgamation (MI GoldTrap),
Cold Vapor Atom Absorption Spectrometry (CVAAS),
Wavelength = 253,7 nm
Measuring range:
0,05 μg/m³ to 500 μg/m³ Hg
Detection limit:
0,0001 μg/m³ (Detector);
< 0,01 μg/m³ (System)
Response time:
Typically 180 sec
Max. sample temperature:
200°C
Ambient temperature range allowed:
-5°C to 40°C
Sample line length:
up to 100 m
Signal outputs:
- analogue: 4-20 mA (500 Ω max.)
- serial: RS 232
- Modbus RTU/RS485 (option)
- Ethernet (option)
Status output:
3 x pairs of relay contacts (dry contacts)
Remote access:
Modem and SM-4 software (option)
Power supply:
230 V / 50 Hz;
(110 V / 60 Hz option)
El. power consumption:
Analyzer cabinet: 450 VA;
Air conditioning cabinet: 1000 VA;
Heated sample line: 30 VA per meter
Dimensions:
Analyzer cabinet:
60 x 60 x 60 cm (H x W x D)
Air conditioning cabinet:
73 x 60 x 60 cm (H x W x D)
Probe:
75 x 38 x 34 cm (H x W x D)
Probe controller:
48 x 44 x 27 cm (H x W x D)
Weight:
Analyzer cabinet: 50 kg
Air conditioning cabinet: 50kg
Probe converter unit: 28kg;
Probe controller: 14 kg
Air consumption:
peak 35 l/min, 6 bar (87 PSI)
Calibration:
- automatic, with built in calibration gas generator for elementary Hg (option)
- automatic, with built in calibration gas generator for ionic Hg (option)
- manual, with built in heated fitting for feed of externally provided calibration gas (e.g. HOVACAL®)
As a leading supplier of high precision analytical equipment, we strive at all times to offer top quality solutions. Our products are manufactured according to the ISO 9001 quality regulations.
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Last updated:
2019-07-23
2019-07-23