PureAire Oxygen Monitor & Gas Detector

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Oxygen Monitor & Gas Detector

The PureAire Oxygen Deficiency Monitor, model number TX-1100DRA 99016, is perfect for facilities that use inert gases such as nitrogen, CO2, helium, and argon among others.

The monitor is well suited for use in confined spaces, cryogenic facilities, and freezers. The monitor will remain accurate at temperatures as low as -40C.

PureAire’s durable, non-depleting, long-life zirconium oxide sensor will last for 10+ years in a normal environment without needing to be replaced.




Long-Lasting O2 Zirconium Sensor
The PureAire Oxygen Deficiency Depletion Monitor features use a long-lasting zirconium oxide sensor.

Capable of providing accurate readings for 10+ years with no scheduled maintenance, and the Monitor comes with a full 3-year warranty.

PureAire’s O2 Deficiency Monitor is suitable for a wide range of uses. From bar and restaurant beverage stations, to tire repair centers, food processing plants, and hospitals.

Our Oxygen Monitors ensure that nitrogen and CO2 gas are safely used and that any leaks are detected before human safety is jeopardized.

Our zirconium O2 sensor performs reliably in temperatures ranging from 55 Celsius to -40 Celsius, so it’s ideal for environments including freezers, cryogenic facilities, and frozen food manufacturing plants.

The low maintenance and long-lasting sensor provide continuous monitoring in applications in which inert nitrogen gas and CO2 gas are stored.

Once set up, the O2 zirconium sensor will operate continuously, without calibration or adjustment. So long as everything is operating properly, the Monitor stays silent, but if oxygen levels fall to the OSHA action level, defined as 19.5%, the Monitor’s built-in horn will sound, alerting employees to danger.

Oxygen  Monitor & Gas Detector Features
10 + Years No Calibration Sensor
Two, user-adjustable, alarm setpoints available or alarm defaults are set to 19.5% and 18.0%
No Maintenance Required
Built-in 90db audible alarm
3 Year Warranty
Digital Display, and 4-20mA Analog Output
Operates in Freezers at – 40 ºC
No Drift due to Thunderstorms or barometric pressure changes
Wall mounting brackets
UL, CUL, and CE Approvals
24V DC Power Supply Included (99016)
International Power Supply Included (99116)


Sampling Method Diffusion
Gases Detected Oxygen (O2)
Range 0 – 25 % O2
Accuracy ± 1 % of Full Scale
Operating Temperature -40 to +55 ºC
Display 3/4″ LCD Digital Display, Back Lit
Sensor Type Long-life zirconium oxide sensor cell
Sensor Life > 10 years under Normal Conditions
Signal Outputs 4-20 mA Analog Output
Dual-Level Alarm Relay Contacts
Power Requirements 24 VDC
250 mA
Width 5.12 in
130.1 mm
Height 4.5 in
114.3 mm
Depth 3.25 in
82.1 mm
Weight 1.6 lb
0.8 kg
Enclosure Polycarbonate
Required Calibration None
No Zero or Span Pot Adjustment Required
Country of Origin USA
Harmonized Tariff Code 8531.10.0045

No Calibration Required
While other oxygen deficiency monitors may require semi-annual (or even more frequent) tune-ups to work properly, PureAire’s O2 Deficiency Monitor provides constant monitoring, with no adjustments necessary. This saves our customers time and money, protects their facilities and employees, and provides them the comfort that comes from consistently reliable performance.

Plug & Play Setup
PureAire’s O2 Deficiency Monitor mounts in minutes, and it is ready to go right out of the box. Simply mount the unit on the wall in a location where oxygen needs to be monitored, plug it into the power supply, and power on the unit. After four minutes, the Monitor will begin sampling oxygen levels, which are continuously displayed on the Monitor’s screen, ensuring readily available observation at all times. Our customers appreciate a reliable oxygen sensor that is easy to use and read, and that operates 24/7, with no oversight or maintenance necessary, for up to 10 years.

PureAire O2 Deficiency Monitor Features
To suit the needs of the user, the PureAire O2 Deficiency Depletion Monitor comes in a range of configurations. Every unit comes with a full-featured, dual-level monitor, options for alarm relays, and hysteresis to account for supply valves for CO2 and nitrogen. All units have a built-in CPU that houses the monitor, display, and alarm



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