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Mercury Monitoring System


Automatic Monitoring of Mercury in Air and other Gases




  • Monitors 2 to 24 measuring points automatically
  • Versions for air, hydrogen and other gases available
  • Permanent purging of all sample lines
  • Measuring ranges from 0.01 µg/m³ to 2000 µg/m³ Hg
  • Software for data acquisition, data visualisation and storage
  • Automatic Calibration Module




  • chlor-alkali plants with mercury cells
  • metallurgical industry
  • fluorescent lamp production or recycling
  • battery recycling plants
  • contaminated sites
  • Hydrogen production plants
  • Laboratories or processing plants working with mercury
  • natural gas industry
    see also product pages for natural gas systems:

    VM_3000 Product page:

    VM_3000 Product page:
    UT-3000 NG mobile



Examples for different applications of the MMS:

link zu MI-News Goldmine in Marathon, Canada

link zu MI-News Cellroom in Newcastle, USA




The sample is continuously drawn from each sampling point through special tubing to a heated multiplexer valve unit. One sample at a time is fed into the Mercury Vapor Monitor where the mercury concentration is measured. All sample lines are permanently purged with sample thus minimizing the response time of the system. By this method sample line lengths of 100 m and even more can be employed.


System Design



The MMS system basically comprises a multiplexer-valve unit and the highly accurate and selective mercury detector VM-3000 Vapor Monitor. A bypass pump maintains a steady flow of sample through the sample filters, sample lines and multiplexer valves. Flow meters with optical alarm sensors guarantee that flow rates are stable. All components are installed inside a protective cabinet.

A special version employing the UT-3000 Mercury Ultratracer as detector is available for concentrations in the sub-µg/m³ range.

Options like air conditioning assure reliable function of the system even under extreme climatic conditions.


Benefits of the Mercury Monitoring System MMS


  • low maintenance demand
  • no sensitivity for water vapor
  • high stability of calibration
  • quick response time
  • customized software
  • minimized memory effekt


Mercury Monitoring System MMS:
Technical Specifications


Multiplexer Module

Number of sampling points:

2 ... 24

Purging of sample lines:

approx. 40 - 80 l/h for each channel

Flow control:

Flow meters with alarm sensors for low flow

Heating of valve unit:

approx. 70 °C

Measuring duration:

45 sec - 99 minutes,
separately adjustable for each channel



Measuring principle:

UV absorption (CVAAS),
Wavelength = 253,7 nm

Principle of preconcentration:
(only special version with

Amalgamation on gold surface,
thermal desorption by rapid heating
(MI GoldTrap)

Measuring ranges:
(standard version with VM-3000)

  • 0,1 - 100 µg/m³
  • 1 - 1000 µg/m³
  • 1 - 2000 µg/m³

Measuring range:
(special version with UT-3000)

  • 0,01 - 50 µg/m³

Sample flow:

approx. 80 l/h per channel

Signal output:

  • analogue: 4-20 mA
  • serial: RS 232
  • Modbus RTU (optional)
  • Ethernet (optional)


Construction, weight and Dimensions


metal, protection standard IP 55 (NEMA 4X, others as an option)


from 553 x 600 x 500 mm (WxHxD) to 800 x 2000 x 600 mm; according to number of channels and optional equipment (air conditioning)


approx. 35 - 175 kg; depending on number of channels and optional equipment



System requirements:

PC with Windows XP or higher

Display of measuring data:

current readings numerically, filed data as concentration-time graphs

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.

MMS cover

Download brochure:


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