Argon Detection - Analox
Argon Detection

Argon Detection

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Argon (Ar) is a colourless, odourless gas. It is part of the noble gases group, which includes krypton, neon, helium and xenon.

It is an unreactive inert gas, so much so that argon comes from the Greek word for lazy!

Argon was discovered in 1894 and makes up just under 1% of the earth’s atmosphere. As it is so prevalent in the earth’s atmosphere, it is one of the most abundant and cheapest inert gases available for use.



Inert gases, such as argon, do not support human breathing. A leak of argon into the atmosphere can cause oxygen levels to deplete, leading to asphyxiation.

Normal air usually has an oxygen concentration of 20.9%. A drop to 19% is enough for some people to suffer physiological effects, whilst a drop to 10% can cause loss of consciousness or even death.



As argon depletes oxygen in the atmosphere, the best way to monitor for an argon leak is to use an oxygen depletion monitor.

Analox offer the O2NE+, an ambient oxygen detection monitor which has two audio-visual alarms, one preset at 19.5% and another set at 18%.

If you also use enriched oxygen, for example in a laboratory, the Safe-Ox+ monitors both oxygen depletion and enrichment, with preset alarms of 23% and 19.5%.


We pride ourselves on solving “weird and wonderful” gas sensing problems and we have over 30 years’ experience in developing custom-built solutions to meet our customer’s exact requirements and high standards.

Contact us today and put us to the test.

A guide to gas monitoring in laboratories


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