Hydrometers & Refractometers

Hydrometers and refractometers are instruments used to measure the specific gravity of your saltwater or the ratio of the density of the liquid to the density of the water. Bulk Reef Supply carries the Red Sea Hydrometer with Integrated Thermometer and the Milwaukee Digital Seawater Refractometer.

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19 Items

  1. True Seawater Refractometer - D-D The Aquarium Solution
    D-D The Aquarium Solution Ltd
    True Seawater Refractometer - D-D The Aquarium Solution
    $69.99

    Earn 345 Reward Points Earn 690 Reward Points

    $69.99
  2. LED Refractometer for Reading Salinity with Calibration Fluid - Bulk Reef Supply
    Bulk Reef Supply
    LED Refractometer for Reading Salinity with Calibration Fluid - Bulk Reef Supply
    $39.99

    Earn 195 Reward Points Earn 390 Reward Points

    $39.99
    Add to Cart
  3. Refractometer Calibration Solution - Bulk Reef Supply
    Bulk Reef Supply
    Refractometer Calibration Solution - Bulk Reef Supply
    $6.99

    Earn 30 Reward Points Earn 60 Reward Points

    $6.99
  4. MA887 Digital Seawater Refractometer - Milwaukee
    Milwaukee Instruments
    MA887 Digital Seawater Refractometer - Milwaukee
    $128.70

    Earn 640 Reward Points Earn 1,280 Reward Points

    $128.70
  5. Salinity/Temperature Digital Pocket Tester - IceCap
    IceCap
    Salinity/Temperature Digital Pocket Tester - IceCap
    $74.99

    Earn 74 Reward Points

    $74.99
  6. SAL-1700 Salinity & Temperature Testing Pen - HM Digital
    HM Digital
    SAL-1700 Salinity & Temperature Testing Pen - HM Digital
    $69.99

    Earn 69 Reward Points

    $69.99
  7. 25-Pack HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    Hanna Instruments
    25-Pack HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    $27.00

    Earn 27 Reward Points

    $27.00
    Add to Cart
  8. PINPOINT Salinity Calibration Fluid - American Marine Inc.
    American Marine Inc.
    PINPOINT Salinity Calibration Fluid - American Marine Inc.
    $8.99

    Earn 8 Reward Points

    $8.99
  9. PM2 Salinity Module - Neptune Systems
    Neptune Systems
    PM2 Salinity Module - Neptune Systems
    $89.95

    Earn 89 Reward Points

    $89.95
  10. Lab Grade Conductivity/Salinity Probe - Neptune Systems
    Neptune Systems
    Lab Grade Conductivity/Salinity Probe - Neptune Systems
    $197.95

    Earn 197 Reward Points

    $197.95
  11. Replacement LED Cover for Refractometers - Bulk Reef Supply
    Bulk Reef Supply
    Replacement LED Cover for Refractometers - Bulk Reef Supply
    $4.99

    Earn 20 Reward Points Earn 40 Reward Points

    $4.99
  12. Single HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    Hanna Instruments
    Single HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    $1.16

    Earn 1 Reward Points

    $1.16
  13. Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    Neptune Systems
    Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    $2.95

    Earn 2 Reward Points

    $2.95
  14. Milwaukee Protective Hardshell Case for Refractometer
    Milwaukee Instruments
    Milwaukee Protective Hardshell Case for Refractometer
    $31.90

    Earn 155 Reward Points Earn 310 Reward Points

    $31.90
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