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Thread: Trust the thermometer or hydrometer?

  1. #21
    Join Date
    May 2009
    UVM Proctor Maple Research Center, Underhill Ctr, VT


    Filter aid doesn't affect hydrometer readings unless there is a huge excess of it -- same as niter doesn't effect hydrometer readings. The hydrometer measures dissolved solids, not suspended solids. If you toss a lot of sugar into a tank, you'll change the hydrometer reading. Toss a lot of dirt in and you won't. Same thing....the dirt doesn't dissolve, so the hydrometer reading isn't affected.

    I agree about the Murphy Cup being a useful tool. Bit of a learning curve (you've got to realize it is a thermometer, not a hydrometer), but once you get your head around it getting the density of syrup right is very easy.

    Perhaps there are some helpful suggestions here https://www.youtube.com/playlist?lis...faQQkRi-tC0ut9 Check the videos on density and on filtering
    Last edited by DrTimPerkins; 01-13-2020 at 11:11 AM.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr

  2. #22
    Join Date
    Jan 2014
    Pomfret in North East CT


    A little gold mine of youtube vids in that link ...thanks Dr. Tim!
    2020 ~New Smokey Lake Dauntless w/flat pan
    Home made coil pre heater
    35 taps on drop lines
    6 on hanging buckets

  3. #23
    Join Date
    Sep 2015
    Rumney NH


    it might be you need more covers or be faster. so you bring your syrup to density. but all the time filtering, canning, moving, bottling, the hot syrup is still evaporating. i had the same problem years ago. not all my bottled syrup was heavy mostly the last couple of gallons. just my two cents
    2017 140 taps 30x8 12x16 shack 28.5 gal
    2018 158 taps 30x8 12x16 shack with 8x8 kitchen 44 gal
    2019 223 taps 30x8 12x16 shack with 8x8 kitchen 36 gal
    2020 226 taps 30x8 12x16 shack with 8x8 kitchen 250 waterloo ro 63 gal

  4. #24
    Join Date
    May 2002
    Lebanon, IN


    There is a correction chart in the Maple Syrup Producers Manual. We use it quite often when our syrup is not at exact temperature. We have had three separate batches from our 2019 syrup tested independently, one was 66.8, one was 68.0 and one was 66.2 so we apparently goofed on that one.
    Maple Creations
    Coatesville, IN
    300 taps on 5/16 tubing & 3 Lunchbox pumps
    RO Bucket R20
    Wood-fired 30"x8' D&G Model 500 raised-flue w/Steam hood & blower
    Sunrise Metals finisher, D&G canner & Wes Fab 7" pressure filter

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