PureAire Monitoring Systems Oxygen Monitor 888.788.8050

Leaders in Oxygen Monitors and Gas Detection

Our mission at PureAire is simple. Keep people safe.

Our Monitors are IN-STOCK and available for immediate delivery

We are proud to announce that we have received the ISO 9001:2015 certification.  PureAire’s  certificate may be viewed here: PureAire Monitoring Systems’ ISO Certificate

*Ships within 1 week

Oxygen Deficiency Monitor

10 + Year Sensor
For Nitrogen, Argon, and Helium Gas
Built-in Audible Alarm
Relays and 4-20mA
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A Few Words from

Our Customers


The Cryo Spa

We have been using PureAire O2 Monitors at The Cryo Spa in Fort Worth for over 3 years now and they have always worked perfectly. I would highly recommend PureAire for any oxygen monitoring needs! …


We already have several of your O2 sensors for a few years at the site and they work great. Thanks.

Smitten Ice cream

We buy a lot of oxygen monitors and PureAire’s are by far the best! They have a much longer warranty than other brands and the product is a lot higher quality. Their customer service is …

Cornell University

We use ~100 of them at Weill Cornell. We have used them for >5 years and have had no issues. They still have to be bump tested and calibrated annually, but having a sensor that …

Gulfstream Aerospace 

The O2 monitors are working well and doing a great job! Alarm relays are configured with the exhaust fan and is triggered a couple of times a day if we have LN2 bottles in the …

Department of Energy

Purchased the PureAire O2 monitoring system and once it arrived had it installed, very simple and neat. After a 4 minute start up sequence it automatically started to operate. We found that this unit is …

Johnson Controls

I use these devices at Yale University in animal rooms and Labs, they work great, very robust! Extremely competitive, I am very satisfied with the ease of use and lead time of this product!

Northrop Grumman

You make an excellent product, and your service is outstanding. I am happy to speak to someone interested in the Oxygen Monitor if they have any more questions about our experience.


Great customer support with timely response and follow up. Product arrived on time and as sold. Simple to install and connect.


My co-worker started using these devices down at Yale University, PureAire O2 depletion monitors. After years of dealing with expensive long lead MSA Tox Alert monitors it was a breath of fresh air to be …


We tested the O2 monitor and it was very nice compared to the one another department in our company has which uses disposable sensors. The calibration free feature really helps us not only reducing the …

Companies We Keep Safe


Latest From

Our News Room

Protecting Against Oxygen Deficiency Risk

Protecting Against Oxygen Defi...

What is Oxygen Deficiency? The air we breathe is made up of 78% nitrogen, 21% oxygen, and trace amounts of other gases such as carbon dioxide, neon, and hydrogen. …
Carbon Dioxide Safety – Why It’s Important to Monitor Carbon Dioxide

Carbon Dioxide Safety – Why ...

What is Carbon Dioxide? Carbon dioxide is the fourth most abundant gas in the earth's atmosphere after nitrogen, oxygen, and argon. At room temperature, carbon dioxide (CO2) is a …
The Hidden Dangers Inside Boiler Rooms – Why You Need a Boiler Room Gas Monitor

The Hidden Dangers Inside Boil...

In an effort to prevent boiler room accidents due to elevated levels of carbon monoxide, the Texas Department of Licensing and Regulation (TDLR) has adopted new regulations (16 …
Gas Monitors Improve Safety in Pharmaceutical Manufacturing

Gas Monitors Improve Safety in...

The manufacture of pharmaceutical products is a complex and multi-stage operation that can include processes such as blending, wet and dry granulation, milling, hot-melt extrusion, coating, and tablet …
When Freshness Counts – Modified Atmosphere Packaging

When Freshness Counts – Modi...

Centuries ago, merchants and shippers would place a lit candle inside barrels used to store biscuits before closing the lid. The idea was that the candle flame would …
Safe Use of Liquid Nitrogen in Food Processing Plants

Safe Use of Liquid Nitrogen in...

In December 2020,  two employees working at a Vernon, California food processing plant lost consciousness and died following an apparent liquid nitrogen leak. On January 28, 2021, there …
Air Delivery of Super-Cooled COVID-19 Vaccines

Air Delivery of Super-Cooled C...

There are several potential COVID-19 vaccines that may soon be available for widespread distribution. In particular, the United Kingdom has recently approved Pfizer’s vaccine, and the U.S. Food …
What are Oxygen Deficiency Monitors?

What are Oxygen Deficiency Mon...

What is an Oxygen Deficient Environment? The Occupational Safety and Health Administration (OSHA) defines an environment in which oxygen levels fall below 19.5 percent as an oxygen-deficient atmosphere, which …
Don’t Throw Away Your Shot…the Cold Truth About Vaccine Handling and Storage

Don’t Throw Away Your Sh...

In modern times, vaccines have been widely used to keep people healthy by protecting them from serious illnesses and diseases. Worldwide, vaccines annually prevent millions of deaths, and …
Brewers Safely Capture and Reuse Carbon Dioxide

Brewers Safely Capture and Reu...

Brewing beer produces carbon dioxide (CO2), especially during fermentation (the process by which yeast converts sugars into alcohol). Estimates are that fermentation yields three times as much carbon …
Image is Everything: MRI and Helium Safety

Image is Everything: MRI and H...

MRI Magnetic resonance imaging (MRI) is a diagnostic procedure that uses a combination of a very large magnet, radio waves, and a computer to produce detailed, cross-sectional, and three-dimensional …
Nitrogen Use in the Fabrication of MEMS

Nitrogen Use in the Fabricatio...

No, not’s MEMS. MEMS (that is, micro-electro-mechanical systems), which are sometimes called micromachines, consist of mechanical and electrical components which work together as a system to attain the …
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Frequently Asked Questions

Why do I need an oxygen deficiency monitor?

What gases can be detected with an oxygen monitor?

What is a 10+year sensor? How does it compare to other types of sensors?

How often do I need to replace sensors?

How often do I need to calibrate O2 sensors? What maintenance is required?

Do I need to purchase calibration gas?

Why do some O2 sensors drift or read inaccurately?

How many oxygen monitors do I need?

Where should I mount an oxygen monitor?

How to calculate response time when using sample tubing?