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.

Loading...
Set Descending Direction

19 Items

  1. LED Refractometer for Reading Salinity with Calibration Fluid
    Bulk Reef Supply
    LED Refractometer for Reading Salinity with Calibration Fluid
    $39.99

    $39.99
    Add to Cart
  2. Salinity/Temperature Digital Pocket Tester
    IceCap
    Salinity/Temperature Digital Pocket Tester
    $74.99

    $74.99
  3. 25-Pack HI70024P 35ppt Salinity Calibration Sachet
    Hanna Instruments
    25-Pack HI70024P 35ppt Salinity Calibration Sachet
    $27.00

    $27.00
    Add to Cart
  4. PINPOINT Salinity Calibration Fluid
    American Marine Inc.
    PINPOINT Salinity Calibration Fluid
    $10.79

    $10.79
  5. True Seawater Refractometer - D-D The Aquarium Solution
    D-D The Aquarium Solution Ltd
    True Seawater Refractometer - D-D The Aquarium Solution
    $69.99

    $69.99
  6. Marine Monitor (pH/Salinity/Temperature)
    Hanna Instruments
    Marine Monitor (pH/Salinity/Temperature)
    $249.00

    $249.00
  7. PM2 Salinity Module
    Neptune Systems
    PM2 Salinity Module
    $89.95

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

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

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

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

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

    $31.90