Thanks for all of the float box advice!
Last year I had two different thermometers to help me with taking the temperature of the sap. I would use the SapTapApp to help me determine the boiling point of water and then would add 7° to that, to get me in the ball park where I would pull it off to finish the syrup later. I had a basic probe thermometer and a digital one. I mostly relied on the digital one.
This year with the new pan, I will be getting a true maple thermometer. The one where it shows 0-50 with 7 being syrup. My question is do you have to calibrate it each and every day in boiling water, prior to starting the boil? As I ask the question, I wonder how would you do that, with sap in the pan.
My guess is the 7° above boiling, in the perfect world, would give you 66 Brix sap and that you might have to get closer to 8° above to get 66.8-67 Brix syrup.
I had a fair amount of faith in my refractometer last year and I will be testing the sugar content with it and will dial it in (pun intended) with the temperature on the thermometer to know what temperature is close to the syrup Brix I want, before drawing it off.
2022 - 5 pan block arch - 109 taps, 73 on 3/16 lines, 36 on drops into 5 gallon pails.
930 gallons boiled, 109 L (28.8 gals) of delicious syrup made.
DYI Vacuum Filter
2023 - 170 taps, mostly on lines, 1153 gallons boiled, 130 L (34.34 gals) of delicious syrup made, on a 2x4 divided pan and base stack, 8” pipe, on a block arch that boiled at a rate of 13 gallons per hour.
2024 - made 48 L, December to March, primarily over two fire bowls.