oskrypuch
Pre-Flight
I believe the alarm points are programmable, though.
(Edit). Well, maybe not. I can’t find it in the description now.
The CO Experts unit I mention upthread, it a little more pricey, but I think it is pretty much the perfect unit for a plane. With its five year lifetime, it works out to $40/yr. So, only 0.04 AMU/yr -- cheap!
* Orest