I've got a "black dot" that is supposed to be good for 18 months. It turned
black on a long flight the other day, so I bought a Night Hawk (Kidde)
battery operated alarm so I could trouble shoot the problem. It cost only
about $40. It will detect 11-999 ppm. The display reads continuously from
30 to 999, but by using the peak hold feature, you can get readings down to
11 ppm.

Being able to read actual values as I made changes to ventilation settings,
sealing with tape, etc. has been very useful.

tom


"Morgans" wrote in message
...
Another informal survey.

How many of you have, and use a battery powered Carbon Monoxide Detector
when you fly?

Why, or why not?
--
Jim in NC