I'm wondering how feasible it would be to make a system with 3 pumps, and holders for ion-selective probes (pH, ORP etc). In an automated process, flood with sa

I'm wondering how feasible it would be to make a system with 3 pumps, and holders for ion-selective probes (pH, ORP etc). In an automated process, flood with sample; measure; evacutate; flood with water to clean; evacuate; flood with KCL to store. Probably too expensive to be practical. For temp compensation: I'm not sure the best approach. Temp dependence is loose, so you can get away with a reasonable temperature error for most applications. I went with on-circuit air temp sensor, with the ability in the drivers to feed in an offboard value. This is a reasonable approximation in many cases, but as you point out, for heated tanks, large ones, in-ground ones, or open bodies of water etc, you need to measure water temp directly.