The ability to reliably measure oxygen concentration in ambient air and provide warning when it dips below safe levels is extremely important for personnel safety in industrial environments. Oxygen concentration in normal ambient air is approximately 20.9%. When the oxygen concentration in air drops to 19.5%, it is considered by OSHA to be oxygen deficient, and at 16% or below it is considered unsafe for humans and may be lethal.  Oxygen deficiency is particularly dangerous as humans are unable to sense it on their own, and many inert gases that displace oxygen are odorless, tasteless, and invisible.

Many common work environments have the potential for oxygen deficiency hazards. Any applications using compressed inert gas or cryogenic gases can pose an oxygen deficiency hazard in the event of a leak, necessitating oxygen monitoring. High oxygen concentrations can also pose a risk – if oxygen exceeds 24% concentration it may considerably increase the risk of fire.

Fixed oxygen monitoring offers a convenient, lower cost, and reliable alternative to portable monitors. We manufacture a line of fixed ambient air monitors for both oxygen and a dual O2 & CO2 analyzer in the form of our OMD-351 series utilizing our state-of-the-art precision electrochemical sensor technology. They feature a real-time oxygen concentration display, an audible alarm, two configurable non-latching form C alarm contacts, visual LED alarms, and an integrated battery backup to ensure safety even in the event of a power failure.

It is recommended to place oxygen deficiency analyzers 3-5 feet off the ground, as well as 3-5 feet away from gas cylinders, and place them every 400-600 square feet to maximize coverage. The OMD-351’s small footprint (9.5”x6.5”x3.8”) and wall mountable aluminum enclosure allows it to easily fit into even relatively confined spaces.