- Long Life Zirconium Sensor – 10+ years average sensor life
- No calibration sensor
- Two, user-adjustable, alarm relay setpoints are available or alarm defaults are set to 19.5% and 18.0%
- Built-in audible alarm 90dB (99029, 99129, 99059, 99092)
- 3-year warranty
- Digital display
- 4-20mA analog output (Active)
- No drift due to thunderstorms or barometric pressure changes
- Wall mounting brackets
- Built-in Flow Sample Pump (99019, 99029, 99059, 99060, 99129, 99130)
- UL, C, UL, and CE Approvals
- 24V DC Power supply included
Reliable and Maintenance-Free Sample Draw Oxygen Depletion Monitor
As a trusted manufacturer of Sample Draw Oxygen Monitor, we are committed to delivering performance, reliability, and long-term value. Our Sample Draw Oxygen Depletion Monitors feature a non-depleting zirconium oxide sensor that operates continuously for over 10 years, without the need for replacement parts, scheduled maintenance, or hidden costs.
Designed for environments where oxygen displacement is a risk, these monitors are ideal for laboratories, cryogenic chambers, hyperbaric chambers, MRI rooms, and freezers. They effectively detect leaks from inert gases such as nitrogen, helium, and argon.
Each unit includes built-in visual and audible alarms for immediate notification and can also be integrated with existing fire alarm systems for broader facility alert coverage.
Engineered for simplicity, the Sample Draw Monitor is easy to install, requires no calibration, and features onboard watchdog software that continuously verifies operational integrity. Immune to fluctuations in barometric pressure, humidity, and temperature, this monitor offers a dependable, cost-effective solution for critical oxygen safety.
| Sampling Method |
Sample Draw |
| Gases Detected |
Oxygen (O2) |
| Range |
0 – 25 % or 0 – 95% |
| Accuracy |
Delivers ±0.2% O2 accuracy (± 1 % of full range) |
| Operating Temperature |
-40º to 140ºF (-40º to 60ºC) |
| 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 (Active)
Dual-Level Alarm Relay Contacts
Built-in Horn |
| Power Requirements |
24 VDC
300 mA |
| Width |
7.25 in
184.2 mm |
| Height |
6.0 in
152.4 mm |
| Depth |
5.0 in
127 mm |
| Weight |
2.4 lb
1.2 kg |
| Enclosure1 |
Polycarbonate |
| Calibration |
Calibration is not required.
Periodic span adjustment as needed. |
Optional
|
Available without Horn. Contact PureAire for details. |
| Country of Origin |
USA |
| Harmonized Tariff Code |
8531.10.0045 |
1 Not intended for explosive atmospheres
Connects to Distributive Control Systems and Programmable Logic Controllers
The AirCheck O2 Sample Draw Monitor can be used with PureAire’s proprietary controllers, either single or multichannel. Dual selectable alarm relays set off strobe lights and remote horns so that staff can learn of the hazard. Individuals can operate the oxygen monitors remotely from as far as 1,000 meters or 0.6 miles from the centralized control systems.
Better Oxygen Sensor Cell
Unlike other oxygen monitors, PureAire’s AirCheck O2 Deficiency Monitor is built with a zirconium oxide sensor cell. This sensor does not need a reference gas and can perform reliably in environments that contain 100 percent nitrogen. The sensitive monitor reads oxygen levels in percentages, so it can operate in lower-temperature environments than the more frequently used concentration-type cells. The improved cell enables PureAire sensors to last 10+ years.
One-Step Sensor Adjustment
PureAire Oxygen Deficiency Monitors require occasional testing with nitrogen to validate the sensor’s response to low oxygen levels. While calibration is not necessary for our monitors to accurately measure oxygen depletion levels1, annual fine-tuning might be needed to ensure the sensor’s span accurately corresponds to the standard 20.9% oxygen concentrations.
PureAire’s Auto-Span not only simplifies the process of adjusting the span of the oxygen sensor but also provides a quick check of the sensor and the monitor’s response to an oxygen-deficient atmosphere. With a press of a button, this feature saves you time and money, protects your facilities and employees, and, most importantly, provides you with the reassurance of consistently reliable performance, making it a valuable addition to your safety measures.
1Please follow your facility’s safety guidelines and state and local regulations regarding calibration requirements for safety equipment.
O2 Monitor System Features
PureAire offers its AirCheck O2 Deficiency Monitor in multiple configurations. Every unit comes with a choice of a low-cost basic display monitor or a full-featured, dual-level monitor with user-selectable alarm relays. When built-in alarm relays are used, the sensor continuously monitors electronics, sensor cells, and sample flows. Any faulty information is provided to the front panel LED, mA output, and alarm relay, for instant notification.
