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Discontinued. Not for sale. Recommended: Water-Resistant Sample Draw Dual Oxygen (0-25%) and Carbon Dioxide (0-50,000 ppm) Monitor

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99127 Drawing scaled
Water-Resistant Dual O2/CO2 Monitor, 0-25% and 10,000 ppm (Discontinued)
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Water-Resistant Dual O2/CO2 Monitor, 0-25% and 10,000 ppm (Discontinued)

Product Summary

The Water-Resistant Sample Draw Dual O2/CO2 Monitor is a self-contained system that is designed for continuous monitoring of inert gases in confined spaces that require daily wash-downs. The monitor can sample O2/CO2 levels from up to 100 feet away and is ideal for facilities that use inert gases including, but not limited to, nitrogen, helium, and argon. Its IP67 water-resistant enclosure keeps the monitor dry during wash-downs. The O2/CO2 monitor is perfect for environments such as breweries, bottling plants, food processing facilities, and laboratories. The monitor will remain accurate at temperatures as low as -40C. PureAire’s durable, zirconium oxide sensor cells, and NDIR cells, will last up to 10+ years in a normal environment, without needing to be replaced.

*This product has been discontinued. Please follow the link below to view the replacement model:

99188 – Water-Resistant Oxygen 0-25% and Carbon Dioxide 0-50,000 ppm Monitor

  • No calibration is required for oxygen
  • Self-calibrating CO2 sensor
  • Local backlit concentration display
  • Built-in visual LED alarm indicators
  • Alarm level 1 and 2 for O2 and CO2
  • No drift due to environmental or temperature changes
  • 3-year warranty
  • No scheduled maintenance zirconium oxide O2 cell and long-life CO2 sensor
  • Built-in flow sample pump for remote sampling up to 100 feet
  • IP67 Water-Resistant Enclosure
  • 4-20mA analog output (Active)
  • Built-in user-adjustable alarms and relays

Long-Lasting Sensors

The PureAire Water-Resistant Combo O2/CO2 Monitor is a compact gas monitoring system that’s ideal for the continuous monitoring of both gases. The monitor is intended for use in nitrogen gas areas, or CO2 food and beverage, confined spaces, and other locations where low oxygen levels may pose a hazard to personnel.

The PureAire Water-Resistant Combo O2/CO2 is made with a proprietary zirconium cell and patented NDIR cell, rather than a continuously depleting electrochemical sensor cell. The zirconium cell means the monitor can provide stable oxygen and CO2 readings despite changes in temperature, barometric pressure, and humidity levels.

The PureAire Combo O2/CO2 oxygen sensor requires no quarterly calibration or annual maintenance and the CO2 sensor automatically adjusts to ambient levels. All you need to do is plug in the monitor and let it run in the background—no scheduled maintenance is required.

 

Sampling Method & Range Sample 0-25% O2 & 0-10,000ppm CO2
Accuracy Delivers ±0.2% O2 accuracy (± 1% of full range) – O2
±30 ppm, ± 3% of measured value – CO2
Operating Temperature -40 to +122F   (-40 to +50C)
Display 3/4” backlit digital display
Sensor Type Zirconium oxide for O2, NDIR for CO2
Sensor Life 10+ years under normal conditions
Signal Outputs 4-20 mA analog output (Active)

One user-adjustable Alarm relay for Oxygen, One user-adjustable Alarm for CO2. Relays are rated 2 amp 24VDC
Power Requirements 24VDC 300mA
Dimensions 7.0 (W) x 11.0 (H) x 6.0(D) inches; 177.8 mm x 279.4mm x 154.4mm
Weight 4.4 lbs (1.9 kg)
Enclosure  Polycarbonate
Calibration Calibration is not required for Oxygen. None for CO2 when Auto Cal function is activated. Periodic span adjustment as needed for Oxygen.
Country of Origin USA
Harmonized Tariff Code 8531.10.0045
Additional O2 Monitor Accessories List Price
8 Channel Controller $3,355.00 US (P/N # 99196)
Horn and Strobe  $190.00 US (P/N # 42002)
Remote Display $435.00 US (P/N # 99091)

Connects to Distributive Control Systems and Programmable Logic Controllers

The Water-Resistant Combo O2/CO2 can be used with PureAire’s proprietary controllers, or a commonly paired accessory, the remote display. Individuals can operate the oxygen monitors remotely by as much as 3,000 feet from fire panels or programmable logic controllers.

No Calibration Required

The Water-Resistant Combo O2/CO2 Monitor does not require quarterly calibration, unlike other types of gas monitors. Since the earth is a natural source of calibrated oxygen, PureAire’s combo monitor is continuously being challenged to 20.9%. Additionally, the earth’s ambient levels of CO2 are 400 ppm. On a weekly basis or on demand, the monitor automatically adjusts to ambient CO2 levels. Enjoy a safer workplace with no calibration, and no expensive scheduled maintenance. A simple, periodic span adjustment may be necessary.

Plug & Play Operation

The Water-Resistant Combo O2/CO2 Monitor is ready to go right out of the box. To begin using the combo monitor, remove it from the box and place it on a surface or mount it on the wall using the included brackets. Then plug the monitor into your facility’s power supply or a wall socket. After a brief startup sequence, the monitor begins to operate.

The Water-Resistant Combo O2/CO2 Monitor is designed to provide unattended 24/7 leak detection for years. Supplied with a full bumper-to-bumper warranty, the Combo O2/CO2 will be the last gas monitor you’ll need to purchase.

O2 Monitor System Features

PureAire uses a sophisticated built-in CPU that provides a local display, safety alarms, and control for both oxygen and carbon dioxide simultaneously.

The Water-Resistant Combo O2/CO2 Monitor comes with 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 drop.

Dual O2 & CO2 Water-Resistant Monitor Product Literature

Water-Resistant Dual O2 / CO2 Monitor Manual

Safety Risks of Oxygen Deficiency

Carbon Dioxide Safety

NIH – Protocol for Use & Maintenance of Oxygen Monitoring Devices 2021

 

 

Remote Digital Display p/n 99091

Horn/strobe 24VDC Red p/n 42002

horn and strobe

CloudConnect

Replacement Filter with Drain 90179

8-Channel Controller for Oxygen, Carbon Dioxide, or Toxic/Combustible Gas Monitors

Dual Hazard Coverage

Monitors both oxygen depletion and CO₂ accumulation.

Water-Proof Protection

IP67-rated enclosure supports use in wet or washdown-prone areas.

Facility Safety Monitoring

Supports continuous monitoring where conditions can change quickly.

Better Environmental Fit

Ideal for production areas where moisture resistance is required.

Oxygen deprivation is a silent killer. Oxygen-depleting gases, such as nitrogen, argon, and helium, are odorless and colorless, making leaks impossible to detect, unless appropriate monitoring is in place.

PureAire oxygen deficiency monitors can be used to monitor nitrogen, argon, and helium. Carbon dioxide can also be monitored with PureAire’s dual oxygen/carbon dioxide monitor.

PureAire uses a proprietary, non-depleting, zirconium oxide sensor that will last up to 10 years in a normal environment without needing to be replaced.

PureAire’s sensors do not operate under partial pressure, meaning that a PureAire sensor will not need to be adjusted to account for different elevations. Additionally, the sensors will not drift due to changes in barometric pressure.

In contrast, other gas detection companies use depleting, electrochemical sensors. These sensors, because they are depleting, operate for 1-2 years before needing to be replaced. Electrochemical sensors do not offer long-term solutions to companies committed to safety.

PureAire sensors are built to last 10 years. Often, the sensors work much longer. In fact, some of our first customers who started using PureAire products in 1997 report that the sensors are still in operation today.

On the other hand, an oxygen monitor that uses a depleting, electrochemical sensor is like a battery in that, as the sensor depletes, it begins to lose its power and responsiveness. In order to operate accurately, electrochemical sensors must be calibrated frequently.

PureAire sensors are made of non-depleting zirconium oxide, and calibration is typically not required.

However, a visual check of the monitor should be done once a year to verify that the sensor is functioning properly, and span adjustments should be done, as necessary. The sensor requires periodic testing with nitrogen to verify the sensor’s response to low oxygen levels.

In contrast, electrochemical sensors, because they deplete over time, will need to be calibrated every 2-3 months and totally replaced every 1-2 years.

Switching to a PureAire non-depleting, zirconium oxide sensor will save you time and money, while ensuring the safety of your workers and facility.

Electrochemical sensors offered by other gas detection companies lose accuracy over time and must be calibrated. Calibration recharges and resets the monitor to get an accurate reading. It is important to note that an electrochemical sensor can only be calibrated a finite number of times before it must be discarded.

PureAire’s non-depleting zirconium oxide sensor will not experience drift. Oxygen sensors from PureAire will provide long-lasting, reliable, and accurate monitoring for an average of10+ years.

The oxygen monitor covers an area of approximately 692 square feet when mounted on a wall and should be placed no more than 21 feet from potential leak sources such as gas lines, gas cylinders, or any areas where a gas leak might be expected to occur.

To ensure safety, the maximum distance between two monitors mounted to the same wall, should not exceed 30 feet. However, since cryogenic gases, such as argon, helium, and nitrogen, are unpredictable, we encourage you to contact PureAire for additional guidance specific to your needs.

In most circumstances, PureAire recommends that oxygen monitors be installed 3-5 feet away from gas cylinders or cryogenic gas lines. To enable employees to see the monitor display and verify its performance, PureAire recommends mounting an oxygen monitor 3-5 feet off the ground.

There are other options for mounting an oxygen monitor. For instance, PureAire sensors can sample the air from up to 100 feet away, or be installed within a glovebox, freezer, sealed chamber, or even underground. PureAire monitors can also work in environments that require KF-25 flanges, as well as in nitrogen/argon enriched environments.

PureAire’s Sample Draw Monitors pull a sample flow at a rate of 250 ccs per minute. We recommend using 1/4” OD x 3/16” ID polypropylene sample tubing. Using this internal tubing dimension, to calculate transport (response) time, add 2 seconds per foot of sample tubing. For example, if the sample tube is 10 feet long, the initial response time would be 20 seconds (10ft x 2seconds=20seconds) at 15 feet the response time would be 30 seconds (15ft x 2seconds=30seconds), etc.

The response time when using the entire 100 feet of sample tube will take 3.5 minutes (100ft x 2seconds=200seconds or 3.5minutes) for the sample to reach the monitor.