Air check 
O2 Digital with Relays Monitor
- No drift due to environmental or temperature changes
- No maintenance Zirconium cell
- No calibration required
- Operates at -40°C in freezers
- 5 + years sensor life
- Local digital display
- 4-20mA output
- Joystick adjustable dual alarm relays
- Integral computer controlled electronics
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 15 seconds and provides accurate measurements over a wide temperature and humidity range. The zirconium O2 sensor cell will operate continuously for 5 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 areas.
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
OxygenDeficiency 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 operate in 100% nitrogen environments. Capable of detecting 0% up to 95% 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 5 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.
Zero-Maintenance Oxygen Monitor
An extremely economical, zero-maintenance oxygen deficiency (O2) monitor is available from PureAire Monitoring Systems. Ideal for the continuous monitoring of inert gas storage areas, confined spaces, and other locations where low oxygen levels may pose a hazard to personnel, the PureAire Air Check O2 Deficiency Monitor is suitable for either indoor or outdoor use.
Important News
Continuous Oxygen Monitor Detects Leaks in Semiconductor Process Tool Transfer Stations
An extremely low-maintenance oxygen (O2) monitor designed to continuously monitor semiconductor process tool transfer stations and a load locks for leaks is available from PureAire Monitoring Systems.