A good article on CO sensors is http://www.avweb.com/news/aeromed/186016-1.html?redirected=1. It reviewed a lot of them and strongly recommended one although they do change all the time. I am also thinking it is better to go electronic but read the article and you will see they are not all equal. The salesmen will say they are all the best.
I contacted Aeromedix who sell the CO Experts Model 2002, the strongly recommended unit. They confirm they will ship direct to Aus. But they have new unit that are presumably better: http://www.aeromedix.com/CO_Experts_Low_Level_Detector_Model_2015.html (or 2014) So I have ordered one to test but not got it yet. In fact having a bit of trouble resolving shipping but they are responsive so expect to get it. Cheers, Rob On Friday, 27 June 2014, Ian Mc Phee <[email protected]> wrote: > Years ago with new engine install in falke I was required use a multi gas > tester in the cockpit (got from Gold Coast council sewerage dept) and it > showed up think 140 parts per million (ppm) CO and as far as I remember the > max in aviation is 25ppm. We had one of those 3 colour CO tester in > cockpit and it really showed nothing thus I have little faith in them. > > We extended the exhaust and totally sealed up fire wall and it was then > down to either 11ppm or 13ppm. > > Now I notice this Saturday Aldi have an electronic CO sensor and warning > (much like smoke alarm) for $19.99. I am going to get one and at least see > where they trigger. > > While I think of it most 4 stroke engines I have had something to deal > with I have the engine pipes coated with ceramic coating. Think each pipe > in Limbach was $45 ea. so not much to pay to reduce heat floating around > the place. > > And the 3rd thing if you need engine pipes rebuilt (aviation welder can > only repair so maybe the only part he uses again is a flange!!). I made a > plaster mold of each pipe in a shoe box with flange facing down. Welder > was able to totally rebuild and they were a perfect fit in mold and then > perfect in aircraft. Bert Flood imports has a full donut SS as used to > rebuild rotax 912 pipes and these are perfect for most engines. > > Finally I always feed a jet of air onto the slick magneto or any > electronics for that matter. They all hate heat. Years ago my magneto > LAME had to scrap a Slick out of a Dimona. He also hates the 5K ohm (or is > it 10K) NGK resistive caps and showed me why on magneto spin up testing. > Gather they are a European requirement for to stop engine nose. I like a > BIG spark like the good old days. > > Hope this is helpful > > Ian McPhee >
