Does mercury have any probes

Automatic measuring device for mercury measurement in emissions (CMM AutoQAL & CMM)

Gasmet offers two solutions for continuous monitoring of mercury emissions, the CMM and the CMM AutoQAL.The CMM AutoQAL is a future-proof, certified automatic measuring device for monitoring theMercury emission with the highest sensitivity on the market, supplemented by an integrated QAL3 validation module. With the lowest certified range and extremely short response time, these systems are the perfect solution for continuous measurement of mercury concentrations from hot, wet and corrosive gas streams.

Mercury monitoring with automatic QAL3 validation

The difference between these two variants is that the CMM AutoQal the only one from TÜV according to EN 15267-certified system (MCERT approval in progress) is on the market as a integral part also via an automatic QAL3 validation module disposes. The certified test gas generator offers the option of carrying out reference point tests with both Hg0- as well as HgCl2 as a test medium, so that the QAL3 operation no longer requires an external gas generator.

This leads to time and cost savings, as a result of which the system can be operated in a more cost-efficient manner. If necessary, manual tests are also possible at any time, all of which can be activated at the touch of a button.

The CMM AutoQAL and the CMM offer certified measurements with the lowest certified range in the world (0-5 µg / m³). The highest certified measuring range of the system is 1000 µg / m³, and even higher concentration peaks can be recorded without any hardware changes. If emission limit values ​​change in the future, the CMM AutoQAL is a future-proof solution that fulfills the certified range even with the lowest ELVs. According to EN 15267-3, the minimum accepted certified measuring range of an AMS (automatic measuring device) must not be more than 1.5 times (17th BImSchV) or 2.5 times (13th BImSchV) the daily mean limit value.

  • Continuous mercury monitoring with automatic QAL3 validation
  • Quick and easy QAL3 functionality
  • Software that provides instant results: pass / fail
  • No need for additional QAL3 equipment
  • Minimal operating costs
  • Future-proof with the world's lowest certified measuring range from 0 to 5 µg / m³ (EN 15267)
  • The highest sensitivity on the market with a detection limit of 0.02 µg / m³
  • Highest certified range up to 1000 µg / m³ and measurement of even higher concentration peaks
  • Measures total mercury and ensures that all mercury compounds are also recorded
  • Excellent availability (99%)
  • Real-time results with excellent response time <120 s
  • Worldwide technical service & support

The special challenges of mercury monitoring

The following facts make the measurement of the mercury content a challenge for many technologies and systems.

On the one hand, mercury is not only found in elemental form (ed0), which is why all Hg compounds, such as HgX2 (X = halogen), before the measurement in Hg0 need to be converted. Only the quantitative conversion of the mercury compounds into elemental mercury leads to the fact that all of the gaseous mercury is measured and ensures that no mercury compounds are not taken into account. To ensure reliable measurements and results, the system uses a thermal converter to automatically convert the mercury from compounds into elemental mercury.

Furthermore, mercury compounds in particular tend to “stick” to surfaces, which limits the reliability of the measurement results. In addition, the Hg concentrations in the emission are usually very low, but depending on the fuel, especially in waste incineration, they can suddenly and temporarily assume very high values. This particular problem of the measuring task was taken into account when selecting the measuring method and when designing the system for the CMM AutoQAL and CMM.

The system measures the total gaseous mercury content starting at extremely low concentrations up to very high concentration values. Materials in contact with the media in the system were selected in such a way that they guarantee excellent response time, quality and reliability of the measured values ​​for this application.

The innovative Gasmet design

The CMM AutoQAL and the CMM systems include a dilution probe, a heated sample gas line, a Gasmet mercury analyzer and a Gasmet test gas generator. The heated dilution probe with a two-stage filter backwash ensures stable operating conditions and low maintenance of the system, even under demanding conditions.

Both systems are based on the measuring principle of Cold vapor atomic fluorescence (CVAF), which with a detection limit of 0.02 µg / m³ currently offers the highest sensitivity worldwide. The detection sensitivity of the fluorescence method, which is fundamentally higher than that of photometry, and the Gasmet design enable direct, continuous and precise measurement without the need for an upstream concentration stage. The integrated thermal converter for converting all mercury compounds into elemental mercury is in principle not subject to aging.

The system works fully automatically, i.e. calibrations are carried out automatically at user-defined intervals. The system settings are accessible via the easy-to-use user interface of the mercury analyzer (MAUI).

The CMM AutoQAL and CMM have excellent availability, resulting in minimal emissions reporting downtime. In addition, local technical service and support from our extensive service and partner network is always available.


  • EN 15267-3 certified with the currently lowest certified area in the world
  • With the highest sensitivity on the market, future-proof
    also with a view to further decreasing limit values ​​in the future
  • Maintenance interval of 3 months
  • Short response time of <120sec
  • Excellent availability of 99%.
  • No cross sensitivities
  • Access to online results
  • Worldwide technical service and support