Just introduced is Geiger CO, a personal carbon monoxide detector designed specifically for pilots.
The detector provides a real time alarm when carbon monoxide levels are dangerously high in the cockpit. The auto calibrating unit includes an aural alarm and a visual LED scale, according to company officials.
When flying, pilots should place it where it is visible while in flight. Because of its small size, it can be hung anywhere, according to inventor James Weibe of Chipper Aerospace, Radiant Technology, and Thin Air Energy.

The product was designed in response to pilot request, said Wiebe.
“Pilots want something that is very small, rechargeable, and quickly capable of identifying carbon monoxide,” he said. “Because it is designed to be attached to a keychain, it is also desirable for anyone who travels (for use in truck cabs or hotel rooms, for example).”
The introductory price is $99 through Dec. 31, 2020, then $149.
Technical details
- Size is 1.2 x 2.0 x 0.3 inches
- Runs for up to 10 hours on a single charge
- Detects carbon monoxide, sounds alarm at approximately 50 ppm
- Shows CO strength at a glance through visual LEDs
- Hangs anywhere using keychain attachment
- Solid aluminum case
Specifications available here.
I recently bought a CO meter, with a digital display for $68 . If it detects a CO level above 40 ppm, the display flashes and a loud alarm is sounded….which it did on one flight where I used the cabin heat for the 1st time in a long time. The CO level was 185 ppm, which surprised me.
I open both wing root vents, pointing one toward my face as I made a quick return to the airport.
In my hangar I removed the cowling and the muff on the right muffler, and found a crack in the weld on the #3 cylinder riser. It was obvious with a large gray/white streak going up the riser pipe.
So, my old muffler will go off to an aircraft welding shop for inspection and repair. If it’s beyond repair, they sell pma parts.