For over 20 years, ExVA Kft has manufactured custom and in-house developed specialised test equipment that are indispensable for carrying out explosion proofing tests. The professional quality of these equipment is demonstrated by our decades long track record of not a single customer having requested any warranty repairs. In order to be able to keep providing the highest quality to our customers, our products are subject to continuous improvement.

Spark Test Apparatus

The spark test apparatus can be used to inspect whether there are any sparks with sufficient energy within a given circuit to ignite the surrounding explosive environment present. This test is intended to analyse whether, during operation, the tested equipment has the capacity to cause any sparks or arcing that would – under the given conditions – set off an explosion of the standard-specified gas mixture inside the given chamber.


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.


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.


MESG Apparatus

The MESG apparatus is intended for determining the g0 (Maximum Experimental Safe Gap) and its corresponding g100 values, which are required for the classification rating of gases, vapours and mists. Furthermore, the apparatus can be used to validate the accuracy of a given gas concentration.


MESG+STA Apparatus

This product also includes a maximum experimental safe gap tester (MESG) and a spark tester (STA). Its advantage is that it saves space and both functions can be controlled from one control system.



  • 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.
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