Propane powered Recirculating mash.

I was brewing an oatmeal stout this last weekend, and was trying to do a 2 step mash, a protein rest at 122 degrees F, and then a saccarification rest at 156 degrees F.

I am using a 10 gallon bayou classic SS kettle w/ false bottom as my mash tun, and was pumping the mash out the bottom and into the top of the mash to recirculate and to stabilize the temperature.

I am using an Arduino with DBS sensor to monitor my temps. When I hit the 122 F temperature, I shut the flame off, but the temp kept rising to about 146.

I realize this has likely been covered before, but I tried a bunch of different search items and couldn't find anything pertinent.

Do I just need to heat to a lower temp and then let it rise over a fewminutes?

I'm assuming your temp sensor is in the side of the tank in the grain itself. For control with recirculation you should really have the sensor on the outlet to get a faster response

Shockerengr said:

I'm assuming your temp sensor is in the side of the tank in the grain itself. For control with recirculation you should really have the sensor on the outlet to get a faster response

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That's what I did after 5 batches on my new setup and it helped a ton. I didn't get a great crush on my grain resulting in terrible efficiency. Good was that controling my recirculating mash was MUCH easier and I feel more accurate coming out of the ball valve over the grain bed. The thermometers were off by a few degrees IIRC.