Yes, I think that's the brand I have, and it worked when it needed to. Woke me up one night, making a big racket in my bedroom.. I had a headache, and opened the windows, then went downstairs to turn off the furnace. Later I learned the flue was almost clogged.
This one plugs in and shows some moving red segments with LEDs, and when the level gets over a certain point, it reports the level.
Apparently at the level I had, other urls say it would take 2 full days or was it 3 to kill me. But if I was too groggy to wake up the next day (not sure if the light and some sleeping woudl have let me wake up or not.) it would have had 3 days to do it's job.
Remove NOPSAM to email me. Please let me know if you have posted also.