PureAire 99132 Explosion Proof Oxygen Monitor 0-25% with 10+ Year Sensor

PureAire's Explosion Proof Oxygen Deficiency Monitor is engineered for high-risk environments where inert gases such as nitrogen, helium, or argon are used. Designed with a rugged, explosion-proof enclosure, this monitor prevents ignition in areas with flammable dust, gases, or fibers-making it ideal for grain processing facilities, powder coating plants, oil and gas refineries, and similar hazardous locations.Built to perform in extreme conditions, the monitor remains accurate in temperatures as low as -40°C. At its core is PureAire's long-life zirconium oxide sensor, which delivers reliable, non-depleting performance for over 10 years in typical use-eliminating the need for frequent sensor replacement and reducing long-term maintenance costs.

Features:

• Suitable for Class 1, Div 1 & 2, Groups B, C, D, Zones 1 & 2, Groups IIB+H2, IIA, IP66
• Long-life 10+ year average sensor life
• Two-alarm relay setpoints available or alarm defaults are set for 19.5% and 18.0%
• No scheduled maintenance required
• Digital display
• 4-20mA analog output (Active)
• No Drift due to thunderstorms or barometric pressure changes
• Wall mounting brackets
• Built-in flow sample pump up to 100ft (99132, 99133, 99136)
• CE, UL, and C UL approval on enclosure

The Explosion Proof Oxygen Monitor offers long-lasting O2 deficiency detection. PureAire's oxygen monitors are reliable, affordable, low maintenance, and provide continuous monitoring for an average of 10 years and more.

Ideal for use in electrically classified locations, confined spaces, analyzer shelters, petrochemical plants, cryogenic gas storage, and locations requiring remote sampling. The EX oxygen monitor can detect leaks of inert gases such as nitrogen, helium, and argon. The explosion-proof oxygen monitor can detect gas leaks at temperatures as low as -40°C.

The monitor features an easy-to-read local display, visual LEDs, and an audible alarm. The oxygen monitor can be linked to fire alarm systems for notification of all employees.

The operator interface is via a menu-driven magnetic keypad, allowing full access without opening the enclosure.

The optional RS-485 feature provides serial communication between a PLC or PC and the monitor, which enables the monitor to transmit current relay and fault status.

The zirconia sensor is not sensitive to temperature, humidity, or barometric pressure changes (including thunderstorms). Unlike other oxygen monitors, replacement sensors are not required, since we use a zirconium sensor, rather than a disposable electrochemical sensor lasting 1-2 years on average. "Supervised watchdog," software runs 24/7 checking electronics and components. Any errors or inconsistencies are reported on the display.

By installing PureAire's explosion-proof oxygen monitor, you can save as much as $400 annually and reduce the time-intensive cycle of replacing sensors.

Connects to DCS and PLC Controls

PureAire's Explosion-Proof Oxygen Monitor continually checks oxygen concentration levels and relays information to the distributive control system, PureAire's single or multichannel controllers, or a programmable logic controller. It can be operated remotely over a 0.6-mile or 1,000-meter radius.

Improved Oxygen Sensor Cell

Rather than the electrochemical sensor used by most companies, PureAire uses a current-limiting zirconium oxide sensor. This sensor runs reliably without a reference gas, so it can be used in all-nitrogen environments. The earth provides calibrated oxygen. When everything is at an ambient state, the sensor is challenged by approximately 20.9 percent oxygen. PureAire's Explosion Proof Oxygen Monitor checks 0 to 100 percent oxygen levels and can operate at a lower temperature than the competition while needing no calibration.

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 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.

Please follow your facility's safety guidelines and state and local regulations regarding calibration requirements for safety equipment.

Features of the Explosion-Proof Oxygen Monitor

PureAire's Explosion-Proof Oxygen Monitor comes in several configurations. All units have a built-in CPU and a low-cost, basic display-only monitor. For additional capabilities, a full-featured dual-level monitor is available. The unit features built-in alarm relays and an air check program that monitors sample flow, sensor cell, and electronics. For full transparency, fault information is transmitted to the alarm relay, front panel LED, and mA output.

For more information, please see Explosion-Proof Oxygen Monitor Literature and O2 Sample Draw Monitor Manual