Gas mixers for medical applications

Ambient air contains impure particles such as dust, bacteria, viruses and pollutants. In medical applications very high requirements with regard to the purity of the used air are standard. WITT-synthetic air gas mixers are the solution for the reliable production of so called “Synthetic Air”, a mixture of pure oxygen and nitrogen in almost atmospheric composition.

WITT-Synthetic air gas mixers are established internationally in numerous stationary installations and are characterised by high safety standard, intuitive handling via touch screen, low investment and maintenance cost , easy integration and low power consumption.

Of course, all gas mixers fulfill highest quality requirements concerning construction, material and manufacturing. Two independently working gas analysers guarantee the right gas mixture of oxygen and nitrogen. Two series connected solenoid valves make sure that no gas escapes even if one valve fails.

The solution is certified according to European Medical Devices Directive 93/42/EEC. 

Gas Mixer MED-MG

Stationary Gas Mixer specially designed for the generation of synthetic air for medical applications

  • quality gas mixer from the world market leader
  • medical device class IIb, CE marked according to Directive 93/42/EEC
  • simple to operate via touchscreen
  • pre-set gas blend
  • gas mixture withdrawal possible from 0 up to 675 Nm³/h
  • highest supply safety by redundant construction of all relevant safety components
  • system only works with sufficient buffer volume

Data sheet Downloads
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GAS MIXER MED-MG for synthetic air


Stationary gas mixing system specifically for the generation of synthetic medicinal air (according to EN ISO 7396-1). Medical device class IIb, CE marked according to directive 93/42/EEC.

Capacity range from 0 to approx. 675 Nm3/h.
For the exact pressure and flow capacity ratios, please refer to the data sheet.

Easy operation:

  • simple to operate via touchscreen
  • pre-set gas blend (adjustable inside gas mixer)
  • gas mixture withdrawal possible from zero to the maximum flow capacity

High process reliability:

  • highest integrity to supply safety by independent construction of all relevant safety components
  • 2 independent integrated Oxygen Analysers for permanent control and documentation of the gas mixtures
  • self-monitoring of analysers additional monitoring via alarm module
  • monitoring of the gas supply with pressure transmitter
  • inlet pressures that are too low trigger an optical alarm and shut down the system
  • lockable transparent door and back panel for protection of settings
  • independent of pressure fluctuations in the gas supply
  • intermittent gas mixture withdrawal possible
  • USB connection for file transfer
  • Ethernet connection for network integration
  • triggering for solenoid valves provided by customer


  • additional heater for low ambient temperatures
  • fully automatic calibration
  • moisture analyser



Gas Receivers

Steel and stainless steel receivers for gas mixtures