Gas analysis equipment

Our gas analyzers determine precisely what is in gas mixtures:

• the concentrations of the individual components of the gases
• the gas quantity
• the gas quality according to a correlative method

Thanks to the use of state-of-the-art sensor technology and intuitive operating elements, they are easy to operate. At the same time, they guarantee exact analysis results, which guarantees the quality of the processes. Depending on the type of application, gas analyzers are supplied integrated with mixing systems or separately. They can be installed stationary for continuous gas analysis. They measure the concentrations of various gases and are used in a wide range of applications as mentioned above. Industrial applications include the control of gas supply lines in thermoprocessing plants.

For continuous gas analysis, the analysis module is integrated into the gas mixing system. In this way, continuous monitoring of the gas mixture is possible. A further industrial application is the control of the gas for protective and surface refinement in the steel industry, where a high accuracy of the gas mixture is required. Sample analyses with mobile equipment are more in demand in laboratories and in the food and packaging industry.

The technical core of the gas analysis devices is the measuring cell. There are various construction variants, such as measuring cells based on zirconium dioxide, which respond very quickly and last a long time, but require a lot of power and are sensitive. There are also low-cost electrochemical measuring cells that operate without supply voltage, paramagnetic dumbbell measuring cells for long-term stable measuring signals with longer calibration intervals, and low-wear microthermal sensors.

With the latest generation of gas analyzers, gas suppliers can make their analyses even more environmentally friendly. To do this, they use gas analysis devices that use a microthermal sensor in combination with a critical nozzle. They are initiating a generational change in gas mixing stations. In biomethane feed-in stations, the calorific value can be adjusted to the calorific value in the pipe by adding air or butane.

Gas suppliers must monitor the quality of the natural gas. This consists of over 80 % methane, as well as ethane, butane, propane, nitrogen and carbon dioxide. Individual types of natural gas differ, sometimes considerably, in their composition; they contain varying amounts of the individual gases mentioned. However, this is of minor importance for gas applications. In practice, the important parameters have to be determined:

• Calorific value of the gas
• Methane number
• Wobbe-Index (quality determination of fuel gases such as natural and town gas)

Our gas analysis devices determine these parameters in the natural gas industry and at suppliers such as municipal utilities. A common analytical method is IR spectroscopy (infrared spectroscopy), which enables rapid gas analysis. It operates with infrared radiation of wavelengths 800 nm to 1.0 mm and analyses the energy states in molecules. The analysis is based on the identification of the gas mixture using a reference spectrum. Alternatively, gas chromatography (GC) can be used, whose selectivity is even higher but requires a much longer response time. It is also expensive in terms of equipment and requires a lot of maintenance.

A gas chromatograph analyses the composition of natural gas or upgraded biogas and determines its most important components in mol% proportions. The following quantities are then calculated from these proportions:


The gas chromatograph thus provides the analysis values required for a state or calorific value conversion with calculation of the compressibility number according to GERG 88-S or AGA 8 in a calibratable form. For all versions a PTB type approval or type examination certificate (module B) according to the new measuring and calibration regulations is available.