Research Labs Applications:
Carbon dioxide is often measured as a process variable to indicate a completion or partial completion of chemical reactions
Gases of Concern: Argon, Helium, H2, N2
Range of Measurement: Trace or Percent
Monitoring of Oxygen in Confined Spaces
Monitor quality of breathing air to ensure that the cryogenic gases used in the labs do not deplete the breathing air oxygen
Gases of Concern: N2
Range of Measurement: Percent
For facilities such as laboratories, industrial plants, medical facilities, food processing plants, et al. that have closed or restricted areas containing stored or piped inert gases such as nitrogen, helium, argon, carbon dioxide, etc., deployment of a room oxygen monitor is an excellent way of helping to ensure that breathing air oxygen levels are properly maintained.
Most room oxygen monitors are designed to provide 24/7 protection by alerting personnel of a change in oxygen levels. However, not all room oxygen monitors (often referred to as oxygen deficiency monitors) are the same. There are appreciable differences between models of automobiles, laptop computers, and yes, room oxygen monitors. The focal point of Alpha Omega Instruments’ room oxygen monitors is their long-life electrochemical sensors with EESTM(enhanced electrolyte system). EES helps to ensure that the useful life of the sensor is in years not months like most “fuel cell” type oxygen sensors. Backing the Company’s claim of sensor longevity is Alpha Omega Instruments unprecedented extended sensor warranty. Many room oxygen monitors use sensors that need to be replaced every 12 months or so (planned obsolescence). But that’s only half of the problem. It is quite common for room oxygen monitors with fuel cell sensors to produce false low oxygen alarms due to the rapid deterioration of the sensor. In a fashion similar to a flashlight battery, as the sensor ages its electrical output drops simulating a low oxygen event. In an attempt to overcome this problem, users find themselves having to provide frequent recalibration of the monitors-something most facilities don’t have the time to do.
Another important distinction to be made is that Alpha Omega Instrument’s oxygen sensors are not high temperature, current limited zirconium oxide sensors. This type of sensor operates at approximately 450C and has a reputation of failures due to high temperature stress. If the sensors fail the accompanying printed circuit board often needs to be replaced-a costly expenditure. And, contrary to several manufacturer’s claims for 10 year plus maintenance free operation, they do require frequent adjustment (AKA recalibration)-just read their manuals.