PureAire Oxygen Deficiency Monitor with Remote Sensor

The PureAire Oxygen Deficiency Monitor with Remote Sensor is engineered for facilities that use inert gases such as nitrogen, helium, and argon, where oxygen displacement can pose a serious, invisible asphyxiation hazard. The remote sensor extends monitoring capability up to 30 feet from the main unit, making it ideal for cryogenic freezers, storage tanks, confined spaces, and hard-to-access mechanical rooms.

At its heart is a non-depleting zirconium oxide sensor that operates for 10+ years without replacement or scheduled maintenance — even in environments as cold as -40°C. Unlike disposable electrochemical sensors that drift with barometric pressure and need frequent replacement, the zirconium sensor holds its accuracy with no zero or span calibration adjustments required, saving up to $475 per year in maintenance costs.

Choose from 10, 20, or 30-foot remote cable lengths, each available with a domestic or global power supply.

Features

• Long-life zirconium oxide sensor — 10+ year average sensor life with no scheduled maintenance required
• Remote sensor capability up to 30 feet from the main unit — ideal for cryogenic freezers, storage tanks, and confined spaces
• Two user-adjustable alarm relay setpoints (defaults 19.5% and 18.0%)
• Built-in 90 dB audible alarm
• Digital display — ¾” backlit LCD
• 4–20 mA analog output (active) for connection to SCADA, PLC, and centralized controllers
• Operates in freezers down to -40°C; no drift due to thunderstorms or barometric pressure changes
• Wall mounting brackets and 24 VDC power supply included
• UL and CUL approvals; CE approval; factory calibrated against a NIST-traceable reference standard
• 3-year warranty; two-year extended warranty available (US, Canada, Mexico)

Specifications