High-Output Digital Precision Gas Mixer

The high-output digital precision gas mixer is a universal portable device that can be used to produce a discretionary mixture of air and gas chosen by the user, primarily for filling explosion chambers. The unit can be used as a stand-alone device. The output of the device is three times higher compared to that attainable in the spark test apparatus. Accordingly, its delivery capacity is also threefold. The equipment is fully automatic, only the selected gas, air and power needs to be connected.

The mixing process is closed-loop. In the case of prescribed input pressures and the lowest possible differential pressure setpoint, the mixture is generated independently of ambient pressure. Given that mixing happens in an isolated system, the generated mixture is not influenced by either ambient temperature or humidity. No oil lubrication is necessary for the mixing unit to operate. No oil vapours are thus introduced to the mixture, so such cannot deposit on the different components of the explosion chamber, thereby rendering measurement impossible.

Mixer accuracy is +0.2% by vol. to 0.13% by vol. The required gas/air mixture can be selected across the full range of 1–99% by vol. without having to use any auxiliary equipment.

Technical parameters

  • Computer-aided automatic operation (complete with software)
  • Control MMI: keyboard, mouse, USB for the computer
  • Gas/air range: 1–99% by vol., accuracy: +0.2% by vol. to 0.13% by vol.
  • Input pressure: Gas – approx. 1bar
  • Air – approx. 1bar
  • Delivered quantity: 699L/h–258L/h for 1–99% by vol.
  • Power connection: 230VAC / 50Hz


  • Throughout the many years of our cooperation with ExVA, we have always been impressed with the unusually high level of preparedness among their personnel. They have been happy to help us in the certification process of all our products.

    Miklós Kovács – CEO, Szerver Szektor Kft.
  • We have worked with ExVA Kft. and their predecessor (BKI) since 1992. Over the past nearly 30 years, they have completed several dozen type-test certifications for us. They provide high-standard professional support for the design phase of the equipment our Company manufactures for use in potentially explosive environments and for conducting their testing according to the requirements of the latest EU Directive, as well as for the proper functioning of our production quality assurance.

    Levente Földi, Head of Technical, Földfém Gépgyártó és Javító Kft.
Curious about our services? Reach out to us!

Our trained and friendly staff will be happy to assist, whether it concerns certification, testing or manufacturing custom test equipment.

Continue to contact details

Questions? E-mail:

Call us:
+36 1 408 2213