- 0-25KF25 Flange connector
- Monitors in Vacuum (20 torr)
- Long life 10 + years average sensor life
- Two-Alarm Relays for 19.5% and 18.0%
- No Scheduled Maintenance Required
- 3 Year Warranty
- Digital Display
- 4-20mA Analog Output (Active)
- Operates in Freezers at – 40 ºC
- No Drift due to Thunderstorms or barometric pressure changes
- Wall mounting brackets and optional plug-in wall power supply
- UL, C, UL, and CE Approvals
- 24V DC Power Supply Included (99035, 99178)
- International Power Supply Included (99128)
PureAire’s KF25 0-25% Oxygen Monitor continuously monitors gas lines, 3D printers, glove boxes, nitrogen gas compressors, vacuum chambers, and any locations where low oxygen levels need to be monitored. Unlike electrochemical sensor cells, PureAire’s O2 zirconium sensor cell provides stable oxygen readings even in areas where temperature and humidity levels are changing. PureAire’s KF25 0-25% Oxygen Monitor is well suited for monitoring directly in a vacuum.
The heart of the monitoring system is a long-lasting zirconium sensor, which detects low oxygen conditions within seconds and provides accurate measurements over a wide temperature and humidity range. The zirconium O2 sensor cell will operate continuously for 10 or more years and requires an absolute minimum of maintenance. There are no zero or span calibration pots to adjust, and when compared to disposable type sensors, our long-life zirconium O2 sensor can save up to $475 annually and will pay for itself in just over 3 years!
The Monitor’s unique sensor mounts directly into chambers or load locks through the use of a KF-type vacuum fitting. Monitoring oxygen directly under a vacuum eliminates the need to change the environment back to ambient and can improve thru put. The Monitor also provides stable readings even in areas that contain high electromagnetic fields.
Connects to DCS and PLC Controls
The AirCheck O2 Deficiency Monitor is 24 V DC powered and transmits continuous oxygen concentration levels to any distributive control system or programmable logic controller.
PureAire’s Oxygen Sensor Cell
The AirCheck O2 Deficiency Monitor uses an exclusive Current Limiting Zirconium Oxide Oxygen sensor that never requires a reference gas. Unlike concentration-type zirconium cells that must have a reference gas, PureAire’s O2 monitor can operate in 100 % nitrogen environments. Capable of detecting 0 % up to 95 % oxygen levels, the current limiting O2 sensor operates at a lower temperature than competitive concentration type cells. The average life of PureAire’s O2 sensor is over 8 years in most environments.
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
The AirCheck O2 Deficiency Monitor is available in many different configurations perfect for OEM process tool installation. PureAire uses a sophisticated built-in CPU that is flexible to provide users with a low-cost basic display-only monitor or a full-featured monitor with dual-level, user-selectable alarm relays.
