The Stratomaster kit will do what you want at a fraction of the cost of the certified kit. You could even replace all your engine instruments, RPM, Fuel level, fuel flow, CHT, EHT, volts, OAT etc etc into one instrument for a few hundred £ and save weight at the same time. At the other end of the spectrum you can fit a single 2.5” instrument which will monitor a full set of CHT’s. If you contact Paul at Parts for aircraft on 028 7776 5796 he will advise. I have been using Stratomaster engine monitoring for the last 3 years and it is very good stuff. I am currently upgrading my E2 engine monitor to a full Enigma/Infinity system which I have connected up on my work bench at the moment.
Rod1