- 10 + Years No Calibration Sensor
- Two-Alarm Relays for 19.5% and 18.0%
- No Maintenance Required
- Ultra Loud Built-in audible alarm 90 db
- Remote sensor capability up to 10 feet
- 3 Year Warranty
- Digital Display, 4-20mA Analog Output
- Operates in Freezers at - 40 oC
- No Drift due to Thunderstorms or
- barometric pressure changes
- Wall mounting brackets
- Ce approved EMC EN 61326-1:2006
The Air check O2 Deficiency Monitor is a compact
gas monitoring system that’s ideal for the continuous monitoring of inert gas storage areas, freezers,
confined spaces, and other locations where low oxygen levels may pose a hazard to personnel. Unlike
electrochemical sensor cells the Air check O2 zirconium cell provides stable oxygen readings even
in areas where temperature, barometric pressure and humidity levels are changing. The PureAire Air
check O2 Deficiency Monitor is suitable for either indoor or outdoor use.
The heart of the monitoring system is a long lasting zirconium sensor, which responds to low oxygen
conditions within seconds and provides accurate measurements over a wide temperature and humidity
range. The zirconium O2 sensor cell will operate continuously for 10 or more years and requires an
absolute minimum of maintenance. There are no zero or span calibration pots to adjust and when
compared to disposable type sensors, our long life zirconium O2 sensor can save up to $475 annually
and will pay for itself in just over 3 years!
Ideal for continuously monitoring oxygen levels in confined spaces or areas where inert gases are
used, the Air check O2 Deficiency Monitor does not drift or loose sensitivity when the weather or
temperature changes. The electronics are housed in a Nema 4X housing or optional EX for hazardous
Connects to SCADA and PLC Controls
The Air check O2 Deficiency Monitor is 24VDC powered and transmits continuous oxygen
concentration levels to any system control data acquisition system, or programmable logic controller.
The PureAire’s Oxygen Deficiency Monitor can also be operated remote up to 1,000 meters or 0.6
miles from centralized controllers.
PureAire’s Oxygen Sensor Cell
The Air check O2 Deficiency Monitor uses an exclusive Current Limiting Zirconium Oxide Oxygen
sensor that never requires a reference gas. Unlike concentration type zirconium cells that must have a
reference gas, PureAire’s O2 monitor can be completely inserted into 100% nitrogen, argon and other
oxygen depleting gases. Capable of detecting 0% up to 25% oxygen levels, the current limiting O2
sensor operates at a lower temperature than competitive concentration type cells. The average life of
PureAire’s O2 sensor is over 10 years in most environments.
The Air check O2 Deficiency Monitor never needs calibration. The earth is a wonderful source of
calibrated oxygen and under ambient levels; PureAire’s O2 monitor is continuously being challenged to
20.9%. There are no zero or span adjustments to make; the only optional response test required is to
subject the O2 system to nitrogen periodically.
O2 Monitor System Features
The Air check O2 Deficiency Monitor is available in many different configurations. PureAire uses a
sophisticated built-in CPU that is flexible to provide users with a low cost basic display only monitor or a
full featured monitor with dual level, user selectable alarm relays. Other options available are Modbus
digital communications or full Wireless radio communications.