ENVEA

- Model SM-4 - Continuous Mercury Emissions Analyzer

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Mercury Instruments (Environnement S.A Group) has developed the SM-4 analyzer specifically for total mercury emission monitoring applications in order to measure very low levels of mercury in flue gases as well as complex matrices (SO2, NOx, HCl, etc.) with high accuracy and reliability.

  • Dry thermocatalytic method: no need for reagents, water refills or solid reagent cartridge replacements.
  • Sample dilution eliminates interference from matrix gases such as SO2, NOx, and HCl, etc. the system being able to measure with virtually any sample matrix
  • Maintenance free converter directly at stack: no transport of ionic mercury thus minimizing mercury adsorption
  • Thermo-catalytic converter principle operating at low temperature
  • Detects elemental, ionic and bound mercury
  • Mercury speciation available (as an option)
  • Automatic QAL3 as an option
  • Very low maintenance (average service interval: 3 months) – can be automated
  • Also exists in a transportable version: Easy to transport, assemble & dismount. Ideal for the determination of total vapor phase Hg emissions at varying measuring points & sites (especially for the control of Hg reduction systems efficiency)
  • Approved and certified by TÜV Rheinland (QAL1), compliant with US EPA 40CFR60 PS-12A Mercury CEMS

  • Coal fired power plants (before & after mercury absorbers)
  • Cement kilns
  • Sulfuric acid producing foundries
  • Incineration plants for industrial waste, sewege sludge...
  • Thermal treatment of contaminated soils, hazardous waste, etc.
  • Metallurgical facilities with potential Hg emissions...

  • Continuous measurement of elementary, ionic & organic mercury
  • Sample dilution directly at stack, allowing large measuring range and the elimination of interferences from matrix gases
  • Sampling system – composed of the probe, the dilutor unit and the catalytic cartridge – is entirely heated in order to avoid mercury adsorption
  • Sampling unit directly on stack: maintenance-free and no transport of ionic Hg
  • Sample line length up to 100 m (300 ft)
  • No liquid waste or condensate generated
  • Extremely high precision measurement
  • Automatic backflush of particulate filter
  • Fast reponse: t(90) time, typically 180-360 sec
  • Option to install elemental Hg calibration gas generator, NIST traceable, inside the analyzer cabinet

  • Measured component: total mercury (oxidised and elemental speciation as option)
  • Measurement principle:Dilution probe with thermo-catalytic converter at stack, Amalgamation (MI GoldTrap), Cold Vapor Atom Absorption Spectrometry (CVAAS), Wavelength = 253,7 nm
  • Converter: Low temperature type (200 °C); directly at stack
  • Measuring range:0,05 μg/m³ - 500 μg/m³ Hg (up to 1000 µg/m³ as an option)
  • Detection limit: 0,0001 μg/m³ (Detector); < 0,01 μg/m³ (System)
  • Response time:180 – 360 sec t[90]
  • Max. Sample gas temperature: 250 °C (482 °F)
  • Ambient temperature range allowed:-5 to 40 °C (23 °F to 104 °F)
  • Sample line length: up to 30 m (100 feet); up to 100 m (300 feet) option
  • 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 communication software (option)
  • Power supply: 230 V / 50 Hz; (110 V / 60 Hz option)
  • Electrical power consumption: Analyzer cabinet: 450 VA; Probe-Converter: 1000 VA; heated sample line: 30 VA / meter
  • Dimensions: Analyzer cabinet: 161 x 80 x 60 cm (63.6”x 32”x 23.6”) H x W x D / Probe: 36 x 36 x 66 cm (14.2”x 14.2”x 26”) H x W x D / Probe controller: 48 x 44 x 27 cm (19”x 17” x 11”) H x W x D
  • Weight: Analyzer (including automatic calibrator): 130 kg (285 lbs) / Probe controller: 14 kg (30 lbs) / Converter unit: 28 kg (62 lbs)
  • Air consumption: 6 bar (85 PSI); 16 l/min approx.
  • 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)

  • Compliance with US EPA 40CFR60 PS-12A Mercury CEMS;
  • QAL1 certified by TÜV Rheinland to  EN 15267-1 (2009), EN 15267-2 (2009), EN 15267-3 (2007), EN14181 (2004). Certificate nb 0000036948

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