Ive been happy about this device since it was first announced. I got one of the early versions. The documentation, functionality and size all make it great to work with. I was one of the unfortunate ones who had the back fall off, which I then lost before I could glue it back together. I reached out to the company and they took exceptionally good care of me! Outstanding customer service with every interaction is as important to me as product quality. Im a huge fan!

I bought my unit back early when it was offered only directly from the manufacturer. This detector is nothing short of fabulous. I fly in a rented Piper PA28-161 ( Warrior II) and the classic black bot panel mounted adhesive detector probably for all I know has not been changed since the plane was built in the early Reagan Administration. No one seems to know the installation date of the black dot detector, and the print has faded so badly that if any sort of date was ever marked, its been sun bleached to oblivion. Again, it is a rental at a flight school. I would recommend this unit particularly for renters. People who own their own plane perhaps can install more sophisticated panel mounted detectors. For scrub hobo renters like me, this unit is perfect. I have it on a lanyard along with my laminated checklists. The unit is also handy when at home or in hotels. Its extreme portability means it can be used in many places. The manufacturer of this device also has a lot of expertise in manufacturing light weight avionics for experimental aircraft. This unit is very rugged and well built. Two other posts have reported supposed premature alarms. Perhaps the units are indeed just doing their job and immediately signaling a 50ppm CO level, transient though it may be. Ive had my unit for about a year and it has gone off twice under circumstances that seemed reasonable. Again... highly recommended. especially for renters.

Okay, I hate giving less than stellar ratings but monitor falls a bit short.. Not by letting the gas get to you, but by freaking out when any CO even thinks about coming around or any volital organic compound. Its just too sensitive. I have worked inthe chemical industry for the past 30 years. If you have an alarm set point set too sensitive, it alarms too frequently and becomes a nuisance alarm. If you let it chrip on you learn to block it out theyou start to tune out other alarms. This sets up a bad normalized deviation where you start blocking out warning signs. Please figure out how to make it not so twitchy and it will be a great unit. Gonna head Back to my yellow 2year unit.

Case comes apart in your pocket. Nothing holds it together except the snug fit between the case and the cover. 6 months old and no external signs of abuse. The circuit board just falls right out. Not a good sign for an aviation safety device. Also did not come with a charging cord. Bought at the initial price of $99.99. Aviation is expensive...but come on boys, I expect better than that.

I had same result as another reviewer. Calibrated it in clean air, flew the airplane and then on landing got an aural alert. Re-calibrated in clean air once again, went on another flight with two other CO detectors onboard. Same result, on landing got an aural alarm and LED indicating above 50ppm. Both other detectors meanwhile showed clean air in the cockpit. I cant rely on it and even the documentation it comes with implies that its more of a toy than anything else.

Purchased the monitor at the same time as I replaced the muffler on my 185. It sounded the alarm on my first flight and after a several hours checking the muffler, I checked the monitor and found that it was defective. Ive seen a few similar stories for this monitor so Im going back to the cards.

Gregory E Verified Purchase

Radiant Geiger Co Personal Carbon Monoxide Monitor