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Thread: Refractometer or conductivity probe?

  1. #11
    Join Date
    14.11.2017
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    8

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    Quote Originally Posted by alekslyse View Post
    What is the ms recorded (not kg/l)? What is your tank temperature at the same time as your report your ms?
    My refractometer won't give an ms reading only ppt or sg. The tank is currently at 26c and 51.9ms according to P4. Refractometer gives 1.026 (34ppt) @ ~20c

  2. #12
    Join Date
    07.04.2017
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    157

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    Quote Originally Posted by CraigH View Post
    My refractometer won't give an ms reading only ppt or sg. The tank is currently at 26c and 51.9ms according to P4. Refractometer gives 1.026 (34ppt) @ ~20c
    Check your temperature probe. @ 26 degrees 51.9 = 1.0251 @ 25 degrees = 1.0257 - use a glass of rodi icecubes and water to find absolutely zero on your probe in case its off

  3. #13
    Join Date
    27.01.2017
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    42

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    I would buy salinity calibration fluid at 35ppt and calibrate your refractometer with that, IMO RO water or sterilised water or any such liquid doesn’t give accurate calibration as it’s set point (ie 0) is too far away from what your asking it to measure.

  4. #14
    Join Date
    06.09.2014
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    12

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    I’ve found that when my refractometer and conductivity probe don’t match, it’s because of micro bubbles on the probe. I have my probe in front of a powerhead in my sump and that keeps it reading perfect.

  5. #15
    Join Date
    21.06.2011
    Location
    South Florida
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    827

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    Quote Originally Posted by tbreza View Post
    I’ve found that when my refractometer and conductivity probe don’t match, it’s because of micro bubbles on the probe. I have my probe in front of a powerhead in my sump and that keeps it reading perfect.


    Same here.
    A powerhead in front of probes works perfect.


    Sent from my iPhone using Tapatalk

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