Originally Posted by barryfine
Looking forward to seeing your progress! This is on my to-do list as well. Unfortunately, my list is getting really long. ;-)
edit: One thought on your design. Instead of controlling the pump with the bcs, couldn't you just get a pressure activated diaphragm pump and then just use the bcs to control the solenoid valves for the glycol going to each conical? This way the pump will turn on automatically as needed. My apologies if this is your plan and I misunderstand your description.
I suppose I could, but it wouldn't gain me a ton. With the current plan, I can have the pump turned on to circulate the glycol in the reservoir. The BCS has more than enough outputs to control the pump anyways. It's just another relay to add to the controller. The main restriction with the BCS is the number of temp probes.
I looked in to solenoid valves since they're quite a bit cheaper than mechanical ball valves, but they have very small diameter openings, which could be a problem if I get a small chunk of ice in the line.
The downside to the ball valves is they're apparently a major pain to find in the US. Everywhere I looked was out of stock. So, I had to order them from the factory in china.