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Modular Stack Gas Monitor
SM-4 mobile

 

Automatic monitoring of Total Mercury Emissions (CEM) at different sites

 

SM-4 mobile

 

Introducing the new
SM-4 mobile

 

moving the 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.

 

Tansport SM-4 mobile

 

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

SM-4 mobile applications

 

An example:

link zu MI-News Salvador, Brasil

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 System components

 

SM-4 mobile:
Technical Specifications

 

Measured component:

Total mercury (ionic and elemental speciation as option)

Measurement principle:

Dilution probe with thermo-catalytic converter at stack, Cold Vapor Atom Absorption Spectrometry (CVAAS) with Amalgamation (GoldTrap),
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:

250 °C

Ambient temperature range allowed:

-5 to 40 °C

Sample line length:

up to 90 m

Signal output:

analogue 4-20 mA (500 Ω max.); RS232 serial;
modbus RTU/RS485 (option); Ethernet (option)

Status output:

3 x pairs of relay contacts (dry contacts)

Remote access:

Modem and SM-4 software (option)

Betriebsspannung:

230 V (110 V option); 50/60 Hz

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 B x T)
Air conditioning cabinet: 73 x 60 x 60 cm (H x B x T)
Probe: 75 x 38 x 34 cm (H x B x T)
Probe controller: 48 x 44 x 27 cm (H x B x T)

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®)

ISO 9001

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.

SM-4 mobile cover

Download brochure:

Last updated:
2017-12-05