[APD] CO2 probe

[Kevin_Buckley at uk.neceur.com]

I've read a number of references recently about probes that can measure 
CO2 concentration directly.

I think they're pH probes immersed in a standard buffer solution with some 
kind of membrane to let the CO2 in but keep aquarium water out.

However, I can't find any suppliers or details anywhere.

Anybody used this kind of kit?

Does it work reliably?

Regards, Kevin
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