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Emergency Rescue and Recovery of Casualties
02/08/2024

Detecting Oxygen O2

Posted by Rhys Redrup
detecting oxygen

Detecting Oxygen O2

Oxygen is a colourless, odourless gas that plays a crucial role in sustaining life on Earth. O2 is vital for respiration in most living organisms and makes up about 21% of the Earth’s atmosphere.

What is Oxygen?

Oxygen is a diatomic molecule consisting of two oxygen atoms bonded together. It’s the third most abundant element in the universe and is essential for various biological and industrial processes.

At room temperature, oxygen exists as a gas, but it can also be found in liquid and solid forms at extremely low temperatures. 

Detecting Oxygen O2

Why Would I Need Gas Detection?

You would need a gas detector to monitor oxygen levels because both too little and too much oxygen in the air can be dangerous. Maintaining the correct oxygen concentration is essential for life, and any deviation from the normal level can quickly create a hazardous environment.

Normal air contains around 20.9% oxygen. When this level drops below 19.5%, it’s considered oxygen-deficient, a condition that can become life-threatening within minutes. Oxygen deficiency often occurs when other gases, such as nitrogen, carbon dioxide, or methane, displace the air’s oxygen in confined spaces. It can also result from processes that consume oxygen, such as rusting, fermentation, or combustion. These situations are common in industries like wastewater treatment, confined space entry, or underground construction, where airflow is limited and oxygen can be depleted without warning.

Low oxygen levels affect the body very quickly. At around 19%, people may begin to feel lightheaded or experience reduced coordination. As oxygen drops to 16%, headaches, dizziness, and confusion can occur. When levels fall to 10–12%, loss of consciousness and even death are possible without immediate rescue.

Products We Recommend

BW Clip 2 Year Single Gas Detector

Products We Recommend

BW Clip 2 Year Single Gas Detector

Just turn on the device and it runs continuously,  no need for calibration, sensor replacement, battery replacement or battery charging. That means great reliability and no downtime; plus, with the BW Clip 2 Year Single Gas Detector for H2S or CO, you can put the device in a hibernation case when you’re not using it for a week or more, and extend its life by that period of time. Compatible gas types include: O2, CO, H2S and SO2.

Honeywell BW Solo single gas detector

BW Solo Single Gas Detector

The BW Solo Single Gas Detector offers a unique combination of user-friendly operation, reliable performance, and easy maintenance, making it a valuable tool for a variety of industries. Data can be downloaded onto the PC, which in turn can be managed through the Honeywell software, designed to automate key compliance tasks. Expertly designed to accommodate 14 distinctly different gas types including ammonia.

Drager PAC 6000 Gas Detector - O2

Dräger PAC 6000 Single Gas Detector

​The disposable personal single-gas detection device, Dräger PAC 6000 Single Gas Detector, measures CO, H2S, SO2 or O2 reliably and precisely, even in the toughest conditions. The robust design, quick sensor response times, and a powerful battery ensure maximum safety for up to two years with virtually no maintenance required. The personal single gas detection device warns against hazardous concentrations of carbon monoxide, hydrogen sulphide, sulphur dioxide or oxygen with precision and reliability.

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