That doesn't look like it's designed to sample hot flue gases. It's an ambient CO detector which would be worthwhile if you were heating an indoor space with a RMH and you wanted to assure yourself that it wasn't leaking or backdrafting.
Peter van den Berg would be the definitive authority on what sort of analyser is worth getting.
Location: Wellington, New Zealand
posted 8 months ago
Yes, it doesn't have a probe as such. But I was wondering if I could hold it above the flue for a short period. At present my flue is about 30 deg C at the top.
We should throw him a surprise party. It will cheer him up. We can use this tiny ad: