What is an oxygen (O2) gas detector?

An oxygen (O2) gas detector is a device that is used to measure the concentration of oxygen (O2) in the air. The O2 detector works by using one of several different sensing technologies, such as electrochemical, catalytic, or infrared absorption. The use of an oxygen gas detector, particularly in environments with risk of low or high O2 levels like confined spaces, is essential for maintaining a safe work environment and preventing the risk of injury or death due to oxygen deficiency or enrichment.

At what level should an O2 detector alarm?

Accurate measurement of oxygen levels is crucial in confined spaces as low oxygen concentration is the leading cause of death. Workers must check and continuously monitor the oxygen level before entering such areas. If the oxygen concentration exceeds 23.5%, it becomes too oxygen-rich and may ignite combustible gases. On the other hand, low oxygen levels below 19.5% of the atmosphere cause nausea, vomiting, and loss of consciousness, impairing judgment and coordination. In case of low oxygen levels, it's essential to identify the gas responsible for the displacement and the reason behind it.

What is O2 deficiency?

When the air we breathe lacks the necessary amount of oxygen to fuel our respiratory systems, it results in oxygen deficiency. The normal concentration of oxygen in the air is around 20.9% by volume, but when it drops below 19.5%, it causes symptoms like dizziness, confusion, rapid heartbeat, and impaired judgment. In severe cases, it can even lead to loss of consciousness, seizures, and death. Oxygen deficiency can occur in confined spaces like tanks, silos, and tunnels, or in areas with poor ventilation and high-altitude environments where the air pressure and oxygen levels are low. It's crucial to use appropriate oxygen detection equipment like oxygen gas detectors and follow safety procedures to minimize the risk of oxygen deficiency in the workplace.

Oxygen (O2) Gas Detectors

Accurate oxygen (O2) measurements are essential to prevent injuries or deaths in situations with potentially high or low levels of oxygen. O2 gas detectors will typically trigger an alarm when the oxygen level drops below 19.5 percent volume. The most common use of oxygen gas detection is in confined spaces—totally or partially closed areas not designed to be permanently occupied. It is essential to draw an O2 gas sample before entering these spaces and continuously monitor O2 levels after entry.

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Oxygen (O2) gas detectors for confined space entry

More about Oxygen

Effects of Various O2 Levels

Concentration of O2

Resulting Conditions on Humans

23.5% Volume

Maximum "Safe Level"; OSHA.

21%

Oxygen Concentration of air (20.954).

19.5%

Minimum "Safe Level," OSHA, NIOSH.

17%

Impairment of judgment starts to become evident.

16%

First signs of anoxia appear.

12-16%

Breathing and pulse rate increase, muscular coordination is slightly impaired.

10-14%

Emotional upsets, abnormal fatigue upon exertion, disturbed respiration.

6-10%

Nausea and vomiting, inability to move freely and loss of consciousness may occur.

<6%

Convulsive movements and gasping respiration, respiration stops and a few minutes later heart action ceases.

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Radius BZ1

Multi-Gas Monitor

Ventis Pro5

Multi-Gas Monitor

Ventis MX4

Multi-Gas Monitor

MX6 iBrid

Single-Gas Monitor

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Frequently Asked Questions

What is Oxygen (O2)?

Oxygen (O2) is a diatomic molecule consisting of two oxygen atoms. It is a colorless, odorless gas essential for the survival of most living organisms. Oxygen makes up about 21% of the Earth's atmosphere and is crucial for cellular respiration in humans, animals, and plants. It is also used in various industrial processes, including metal cutting and chemical production.

Why is Oxygen (O2) detection important?

Oxygen (O2) detection is vital for ensuring safety in environments where oxygen levels can fluctuate. Inadequate oxygen levels can lead to hypoxia, while excessive levels can cause oxygen toxicity. Monitoring oxygen levels is essential in industries such as healthcare, aerospace, and manufacturing to protect workers and maintain optimal operational conditions.

Can you be exposed to too much Oxygen (O2)?

Yes, exposure to excessively high levels of Oxygen (O2) can be harmful. Oxygen toxicity can occur when inhaling pure oxygen or high concentrations for extended periods. Symptoms include lung damage, vision disturbances, and seizures. It is crucial to regulate oxygen levels, especially in medical treatments and high-risk occupations, to prevent adverse health effects.

How do you detect Oxygen (O2)?

Oxygen (O2) is detected using various types of sensors, including electrochemical, zirconia, and optical sensors. Electrochemical sensors are common in portable gas detectors, providing real-time monitoring. Industrial Scientific offers a range of O2 detectors, including portable gas detectors and gas monitoring software systems.

Oxygen (O2) Gas Detectors

Characteristics of Oxygen

Effects of Various O2 Levels

How to Detect Oxygen

Area Monitor

Radius BZ1

Multi-Gas Monitor

Ventis Pro5

Multi-Gas Monitor

Ventis MX4

Multi-Gas Monitor

MX6 iBrid

Single-Gas Monitor

GasBadge Pro

Frequently Asked Questions

Explore Resources

Five Ways to Make Confined Spaces Safer for Workers

Why Consider Switching to a Long-Life Oxygen Sensor?

Acceptable and Dangerous Gas Levels in Confined Spaces

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