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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17 Items

  1. HI98319 Marine Salinity Tester - Hanna Instruments
    Hanna Instruments
    HI98319 Marine Salinity Tester - Hanna Instruments
    $69.00

    Earn 69 Reward Points

    $69.00
  2. Salinity/Temperature Digital Pocket Tester - IceCap
    IceCap
    Salinity/Temperature Digital Pocket Tester - IceCap
    $64.99

    Earn 64 Reward Points

    $64.99
  3. 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
  4. 25-Pack HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    Hanna Instruments
    25-Pack HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    $26.00

    Earn 26 Reward Points

    $26.00
    Add to Cart
  5. 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
  6. Neptune PM2 Module
    Neptune Systems
    PM2 Salinity Module - Neptune Systems
    $84.95

    Earn 84 Reward Points

    $84.95
  7. Lab Grade Conductivity/Salinity Probe - Neptune Systems
    Neptune Systems
    Lab Grade Conductivity/Salinity Probe - Neptune Systems
    $124.95

    Earn 124 Reward Points

    $124.95
  8. Hanna Instruments HI70024P 35 ppt Salinity Calibration Solution Sachets
    Hanna Instruments
    Single HI70024P 35ppt Salinity Calibration Sachet - Hanna Instruments
    $1.05

    Earn 1 Reward Points

    $1.05
  9. Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    Neptune Systems
    Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens
    $2.95

    Earn 2 Reward Points

    $2.95
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