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Confined Space

CO2 Monitors for Confined Spaces

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Confined Space Partners

How do you monitor a confined space?

The Occupational Safety and Health Administration (OSHA) has required the use of specific gas detection devices in order to verify compliance with requirements also set forth in the Compressed Gas Association Commodity Specification for Air, CGA G-7.1.

In order to monitor a confined space, the most common way is with a gas detection monitor, portable handheld detector, or analyzer. Atmospheric conditions within a confined space are capable of changing at a rapid pace, which makes it very important to continuously monitor for gas hazards.

Do all confined spaces require CO2 monitoring?

Remote CO2 Storage Safety 3 Alarm

An atmospheric CO2 test should be performed in the confined space to ensure the required ambient conditions. You should place the CO2 monitor over 50cm away from individuals, as their exhaled breath contains CO2. If the monitor is too close it could give a misleading reading. 

For more information on OSHA Confined Space Requirements, click here.


What are examples of confined spaces?

  • Oxygen Deficient Atmospheres
  • Fermenters, Mash Tuns, Silos, Keg Coolers, 
  • Cultivation and Indoor Greenhouse Rooms
  • Containment Cavities
  • Grain Silos
  • Electrical Transformers
  • Vaults and More

What defines a confined space?

  • partially or totally closed structures
  • an indoor space that is designed to not be permanently occupied
  • Commonly defined as pits, silos, cellars, or sinks
  • Commonly found having crawl spaces, drains, or pipes
  • Often containing cisterns, tanks, or storage vessels

"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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