Oxygen Deficiency Monitor with 10+ Year Sensor

Item #: TX-1100DRA (99016)


Product Summary

The PureAire Oxygen Deficiency Monitor is perfect for facilities that use inert gases, including, but not limited to nitrogen, CO2, helium, and argon. 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.


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  • 10 + Years No Calibration Sensor
  • Two-Alarm Relays for 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

Long-Lasting Zirconium Sensor 

The PureAire Oxygen Deficiency Monitor features a zirconium oxide sensor cell capable of providing accurate readings for 10+ years with little maintenance. This reliable, maintenance-free sensor will pay for itself in just two years and save your business as much as $475 per year. Every unit comes with a full 3-year warranty for your peace of mind.

The PureAire O2 Deficiency Monitor is suitable for a range of uses. From bar and restaurant beverage stations to tire repair centers, food processing plants, and hospitals, oxygen monitors ensure that nitrogen and CO2gas are safely used and no leaks occur. The zirconium O2 sensor performs reliably in temperatures ranging from 55 Celsius to -40 Celsius, so it’s ideal for a range of environments, including freezers. The monitor also performs well in basements and other confined spaces.

Once set up, the O2 zirconium sensor will operate continuously, without calibration or adjustment. The system monitors for any faults and displays errors on the gas concentration screen, so you can respond.

The low maintenance, long-lasting sensor provides continuous monitoring in environments where inert nitrogen gas and CO2 gas are stored.  As long as everything is operating properly, the monitor stays silent. If oxygen levels reach the OSHA action level, defined at 19.5 percent, a built-in horn alerts employees of danger.

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


Additional O2 Monitor Accessories List Price
8 Channel Controller $2,595.00 US (P/N # 99058)
Horn and Strobe  $160.00 US (P/N # 42002)
Remote Display $375.00 US (P/N # 99091)


No Calibration Required

While other oxygen deficiency monitors might require semi-annual tune-ups to work properly, the PureAire O2 Deficiency Monitor provides constant monitoring with no adjustments. This saves you time and money while protecting your organization and delivering peace of mind.

Plug & Play Setup

The PureAire O2 Deficiency Monitor arrives ready to work right out of the box. Simply secure the unit on the wall 3-5 feet from the gas source, plug it in, and power on the unit. The monitor will begin monitoring oxygen levels after a brief startup period. Oxygen levels are displayed clearly on the screen for easy access and visibility. Enjoy a reliable oxygen sensor that’s easy to use, easy to read, and operates with no attention 24/7 for up to 10 years.

PureAire O2 Deficiency Monitor Features

To suit the needs of the user, the PureAire O2 Deficiency 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

Oxygen Deficiency Monitor 0-25% Literature, 99016

Oxygen Deficiency Monitor 0-25% Literature, 99116

Oxygen Monitor Sales Presentation

DRA case drawing

Air Check O2 25% DRA 99016 Manual

Price Savings for PureAire sensor vs Disposable Sensors

Comparison O2 Zirconium Oxide vs EC cell

Oxygen Monitor for horn/strobe or remote display

Multiple O2 monitors to controller

Fire code Section 5309 Inert Gas Systems Used in Commercial

Remote Digital Display p/n 99091

Horn/strobe 24VDC Red p/n 42002

horn and strobe

8 Channel Programmable Controller for O2 or Gas Monitors

8 Channel Programmable Controller for O2 or Gas Monitors