Salinity Refractometer, Aquarium & Seawater – Dual Scale is used to measure, monitor and control the concentration of salt water and brine, and finds it very useful for aquarium and marine applications. This is a high quality refractometer that measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand and is perfect as a replacement to your poorly featured and complicated to read hydrometer. With just a couple of drops of aquarium water you can now know exactly what your salinity of your aquarium water is.
Natural seawater has a specific gravity of about 1.025 however different oceans have slightly different specific gravities mostly because of rainfall. The tropical Indo-Pacific has an average specific gravity of 1.022 – 1.025. The Caribbean has an average specific gravity of 1.023 – 1.026. The Red Sea has an average specific gravity of 1.028 – 1.035. The purpose of this refractometer is to allow you to monitor your aquariums sea water and keep it as close to natural seawater as possible. Your corals need to feel at home to thrive properly and for that it is very important to keep the salinity of the water close to the natural environment from where it has been picked up.
This refractometer also features ATC which allows an automatic temperature compensation of your readings. Temperature is the single most important factor influencing refractometer readings and is one of the largest sources of measurement error. With built in ATC this device automatically corrects and compensates for this error when ambient temperature varies from the standard temperature of 68°F (20°C) anywhere between 50°F to 86°F (10°C to 30°C).
Features:
• Dual scale to measure Specific Gravity (D 20/20) and parts per thousand (‰)
• Allows you to monitor and correct the salt levels in your aquarium to emulate natural seawater.
• Has Automatic Temperature Compensation (ATC) for temperature variance between
• 50°F to 86°F (10°C to 30°C).
• Measures Specific Gravity from 1.0 to 1.070
• Measures salinity between 0-100‰
• Easy calibration with distilled water
• Adjustable Eyepiece
• Hard plastic carrying case
• Pipette, soft cloth and calibration screwdriver included.
• 1 year warranty.
Instructions for use
• To find out the salinity of water, simply place a few drops of a sample liquid on the measurement prism.
• Make sure that enough solution is added to the prism so as to cover the entire prism.
• Next close the prism so that the liquid gets to spreads across the whole surface of the prism without letting in any air bubbles or dry spots.
• Now hold the instrument under a light source and look through the eyepiece.
• The salinity concentration is found out by the intersection of the boundary of the light and dark fields named as the shadowline on the printed scale.
• The left side of the scale indicates the specific gravity and the right side parts per thousand.
• If the scale appears out of focus, the eyepiece can be adjusted by rotating the knurled portion.
• Under normal conditions, optimal contrast is achieved by holding the instrument beneath and perpendicular to a light source.
• After the reading has been taken, wipe dry with a clean cloth and place the instrument in the supplied plastic case. Store the instrument in a safe, dry environment. Do not rinse.