Thermocouple above dispersion screen?

[Ozark_61]

I'm getting tired of holding a tc under the gh when doing the cooling flush, so I'm looking for another way of getting a reading of the water. I'm not sure if cannonfodder tried this before the screw probe or not - but would it work to snake a TC between the screen and the GH, with having the lead go above the gasket and out the side of the GH? If so, would a thin lead hold up to the friction in that area?

Thanks,
Geoff

[HB]

I'm getting tired of holding a tc under the gh when doing the cooling flush, so I'm looking for another way of getting a reading of the water.

Why do you need to measure the cooling flush? To answer your question, yes, you can snake a 30 or 36 gauge wire underneath the gasket. Watch that the dispersion screen edge doesn't clip the wire, especially the lighter 36 gauge. Obviously you have to lock-in more carefully too.

BTW, if you really want secure readings, consider Greg's solution from E61 brew temperature (Cannonfodder Device):


External front view


Probe exit above dispersion screen

[Ozark_61]

Why do you need to measure the cooling flush? To answer your question, yes, you can snake a 30 or 36 gauge wire underneath the gasket. Watch that the dispersion screen edge doesn't clip the wire, especially the lighter 36 gauge. Obviously you have to lock-in more carefully too.

I may need to go back and revisit this issue, but I found originally that there was some variability of time vs. temp on the cooling flush. Generally, I flush down to 201' (or 198' etc) and then, as you suggested, pause a moment before pulling the shot. Possibly depending on the autofill state of the boiler there is some slight temperature shift making a ± 1-2 second variability. Maybe this isn't necessary, but when malachi posts about the optimum temperature of a shot down to the tenth! of a degree, then I'm trying to be as precise as possible (I'd still like to figure out how to hook that relay into the pump switch to stop the flush at a desired temp...

Geoff