Cookie Notice

This online store uses cookies to remember users, enable checkout and to collect aggregate information that allows us to analyze traffic patterns on our site (no personal information is stored). For more information you can read our Privacy Policy.

Gas Leak and Flame Detectors, Analyzers, Alarm Devices and Calibration Gas


PUREAIRE 99039 (1)

PureAire Dual Oxygen (O2) and Carbon Dioxide (CO2) Monitor (Diffusion) with zirconium O2 cell and long life CO2 sensor. Includes digital LCD display, 4-20mA output, built in horn, alarm relays and Power Supply (110V). Polycarbonate Enclosure. CE Listed.

Part# with Options:        99039
Price with Options:        1,864.55


Power Supply
(1) Power Supply for PureAire AirCheck O2 (220V)
Horn and Strobe Combo
(2) Horn and Strobe Combo for PureAire AirCheck O2
Remote Display
(3) Remote Display for PureAire AirCheck O2

  Availability In Stock  ]

  • No maintenance zirconium O2 cell and long life CO2 sensor
  • No calibration required for oxygen
  • Self-calibrating CO2 sensor
  • Local backlit concentration display
  • Built-in audible horn
  • Built-in visual LED alarm indicators
  • Alarm level 1 and 2 for O2 and CO2
  • 3 year warranty
  • No drift due to environmental or temperature changes

The PureAire Dual O2 /CO2 Monitor is a compact gas monitoring system that’s ideal for the continuous monitoring of both gases simultaneously in N 2 gas storage areas, CO2 beverage gas distribution areas, confined spaces, and other locations where low oxygen levels may pose a hazard to personnel. Unlike continuously depleting electrochemical sensor cells, the PureAire Dual O2 /CO2 exclusive zirconium cell and patented NDIR cell provide stable oxygen and CO2 readings even in areas where temperature, barometric pressure and humidity levels are changing. The PureAire Dual O2 /CO2 oxygen sensor requires no quarterly calibration or annual maintenance and the CO2 sensor automatically adjusts to ambient levels. Just plug it in and leave it alone.

No calibration required

The Dual O2 /CO2 Monitor does not require quarterly calibration. The earth is a wonderful source of calibrated oxygen, and under ambient levels, PureAire’s Dual monitor is continuously being challenged to 20.9%. Additionally the ambient earth levels of CO2 are 400ppm. Every week, or on demand, the monitor automatically adjusts to ambient CO2 levels. There are no zero or span adjustments to make or expensive maintenance required.

Plug & Play Operation

The Dual O2 /CO2 Monitor is ready to go right out of the box. Just mount it to wall or other surface and plug in the power supply into any wall socket. After a 4-minute start-up sequence, the monitor automatically starts operating. It’s designed for unattended 24-7 leak detection for years. Supplied with a full bumper-to-bumper warranty, the Dual O2 /CO2 will be the last monitor you’ll need to purchase.

PureAire’s Dual O2 /CO2 monitor installations

The Dual Monitor is used in restaurants where CO2 and nitrogen are used to dispense beverages and agricultural grow rooms to alert and protect personnel from entering potentially hazardous situations if a leak occurs. Ideal for continuously monitoring oxygen and CO2 levels in confined spaces or areas where inert gases are used, the Dual O2 /CO2 Monitor does not drift or loose sensitivity when the weather or temperature changes.

Dual O2 /CO2 monitor Control Features

The Dual O2 /CO2 Monitor has individual dedicated user selectable relays designed to operate on-off valves for the control of CO2 injection in grow rooms while simultaneously activating alarms when oxygen levels get too low. The oxygen sensor can also be used for controlling nitrogen generators for hypobaric rooms while using the CO2 sensor to alarm to TLV levels of carbon dioxide. PureAire uses a sophisticated built-in CPU that provides users with an inexpensive monitor with local display, safety alarms and control for both oxygen and carbon dioxide simultaneously.

Sampling Method & Range Diffusion, 0-25% O2 , 0-10,000ppm CO2
Accuracy ± 1% of full scale
Operating Temperature -0 to + 55 C
Display 3⁄4” backlit LCD digital display
Sensor Type Long life zirconium oxide sensor for O2 and NDIR for CO2
Alarm indicators Built-in Audible 90dB horn
Orange LED alarm indicator for CO2
Red LED alarm indicator for O2
Signal Outputs One user adjustable Alarm relay for Oxygen
One user adjustable Alarm relay for CO2
Relays are rated 2 amp 24VDC / 24VAC
Analog Outputs Analog 4-20mA output. Selectable for either Oxygen or CO2
Power Requirements 24VDC 350mA
Dimensions 6.5 (W) x 4.5 (H) x 3.25 (D) inches; (160.1 mm x 114.3 mm x 82.5 mm)
Weight 1.6 lbs. (.8 kg)
Enclosure Polycarbonate
Required calibration None for Oxygen.
None for CO2 when Auto Cal function is activated.

B2B Checkout Options: Designated Carrier and Tax-Exempt purchase
Payment Options: Credit Card, Credit Card Over the Phone, PAYPAL, Wire Transfer and Check

Checkout with Paypal Visa MasterCard Amex Checkout with Wire Transfer Electronic Payment