Digital Precision Gas Mixer

The 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. 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, i.e. no oil vapours are introduced to the mixture, so such cannot deposit on the cadmium disc of the device used for testing intrinsically safe equipment or in the gap of the MESG device, thereby rendering measurement impossible.
Mixer accuracy is ± 0.1% 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
  • Control MMI: keyboard, mouse
  • Gas/air range: 1–99% by vol., ±  0.1% by vol.
  • Input pressure: Gas – approx. 1bar
  • Air – approx. 1bar
  • Delivered quantity: 233L/h–86L/h for 1–99% by vol.
  • Power connection: 230VAC / 50Hz


  • We are completely satisfied with the work of the ExVA team. We carry out several joint works with them and they have always been willing and helpful in responding to our inquiries. The work is always done on time and with professional precision. They are immediately available for any questions that may arise and will be answered constructively.

    Ádám Vasvári – Managing director, ABP-Corp. Kft.
  • ExVA Ltd. have been an excellent support in the explosion proof certification process of our BlueEye™ Ex-D combustible gas analyzer. Nagy and his team have supported us with solutions to the technical challenges rather then just pointing out what isn`t possible. All this in a very efficient way, allowing us short time to market whilst avoiding unnecessary cost. We can highly recommend to use ExVA`s services.

    Bart Riemens – CEO, Bright Sensors SA
  • 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