[pHaestus]

Incoherent you are 100% right about needing pressure drop vs. flow rate data. My digital pressure gauge was acting strangely when I was testing that MCWChill; I can see if maybe it was the low temperatures that were messing it up and if so generate. Otherwise I bid on ebay periodically but haven't yet gotten lucky.

I took the day off today and just went downstairs to look at the test system. The pump is running but the PC isn't on. There is a deltaT of 0.06C across the Maze4 wb at 1.5GPM; raising the flow rate to ~3gpm raises the delta T to 0.07C. Guess I'll swap the inlet and outlet and see if that offset persists (in the opposite direction); if so I'll just go back and adjust the outlet temps by the appropriate amounts. Winder where that came from; I specifically remember putting both these probes into water and they read exactly the same as water temp changed...