Gas Sample Analyser for CHP - fixed or portable?

So 6 months into having our CHPs we have just been told we need to sort out a gas analyser solution for weekly readings.

Bit of a shock as were originally told we would not need one but looks like registration wont be completed until ones is in and running.

Has anyone got any suggestions or recommendations, they are serious money from having a quick look.

Currently we are looking at either 1 fixed analyser unit with pipes on a T to both units, or a portable option. Both would require weekly attention, but apparently we could spend an extra 3k ish on another fixed unit and only have to check them monthly.

The quotes we have all indicate a 4 week lead time plus commissioning and installation whereas the portable unit we can get immediately.

Would there be much of a market providing a gas reading service do you think?

Cheers for the info. Gas Data is one of the options we are looking at. Potentially one of the click systems but piped into 2 units on a T so it could be manually switched over. Are you familiar with the system?

Trying to work out if this would be any good or if its pointless trying to use 1 system for 2 chp's if it does continuous monitoring.

Yeah well that's what ofgem told me recently, however the installers thought it might not be needed due it being chip fueled or something.

They are froeling woodchip burning Chps.