That’s a screen grab of the Aerox smartphone app on an Apple iPhone on the left. It’s about as simple as it gets, with a digital gauge presentation of the bottle’s current oxygen pressure (and precise numerical value), plus the remaining battery life. There’s also a simple utility on a second page within the app that graphs the O2 flow over time. That’s an Aerox Oxysaver cannula with flow meter/adjustable needle valve and WEPS04 pressure sensor (red arrow) plumbed into an Aerox C-sized (9 CF) oxygen cylinder, right.

The potential snag with using portable oxygen bottles is unexpectedly running them empty because you underestimated the amount of remaining O2. Part of the problem is that the bottle—in an effort to reduce cabin clutter—may be stashed in the back cabin or in a seatback where you can’t see the pressure gauge. Florida-based Aerox—a staple in the aviator oxygen accessory market—attempts to solve the problem with its Cylinder Sentinel standalone oxygen monitoring kit.

Priced at $259 and retrofittable to existing Aerox O2 cylinders, the system uses a Bluetooth sensor that plumbs into the bottle with a high-pressure T-fitting. This allows you to retain the mechanical pressure gauge while also displaying the data on an iOS or Android device.

The pressure sensor is powered by a CR2050 battery that’s accessed by unscrewing a cap on the end of the sensor. The smartphone app is free, downloadable on the Apple App Store and Google Play.

Visit www.aerox.com.

Larry Anglisano
Larry Anglisano
Editor in Chief Larry Anglisano has been a staple at Aviation Consumer since 1995. An active land, sea and glider pilot, Larry has over 30 years’ experience as an avionics repairman and flight test pilot. He’s the editorial director overseeing sister publications Aviation Safety magazine, IFR magazine and is a regular contributor to KITPLANES magazine with his Avionics Bootcamp column.

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