Best Digital Refractometer For Salinity

SMARTSMITH Car Antifreeze Refractometer °F Dispay 4 in 1 Ethylene Glycol, Propylene Glycol in Antifreeze Liquids Freezing Point Temperature and Freezing Point Concentration, Automotive Battery Liquid

°F UINT,US BASED DESIGN:You may already got frustrated with those °C display or not American unit.Unlike most other companies,as a US designed brand,our refractometer designed showing °F,only one unit system.With the indication you may easily know the freezing point of either ethylene glycol or propylene glycol based cooling systems,check the window washer Fluid..
4 IN 1 DISPLAY&EASY TO USE:Ethylene Glycol: -60°F-32°F,Propylene Glycol: -60°F-32°F,Battery SG: 1.100-1.400sg,Urea:30%-35%,Windshield Washer Fluid: Ethanol + water :32°F to -40°F, propylene glycol + water (SRF1): 32°F to -40°F。With the 4 in 1 display,you can master full condition of your car,track.A must have item for your cars.Only takes about 2 drops of solutions to get your readings easily.Designed for simple use,No look up table,only 2 steps ,2 drops and even 1 glances to know your reading..
ATC(AUTOMATIC TEMPERATURE COMPENSATION):Handheld antifreeze refractometerr with Automatic Temperature Compensation(ATC),no more worry about the temperature change will influence the reading accuracy.the refractometer will account for changes in ambient temperature and automatically compensate accordingly to provides accurate and repeatable measurements..

Refractive Index is one of the most important optical parameters used to identify and authenticate polished precious and semi-precious gemstones..
Gemological (Gemstone) Refractometer is your primary and most powerful tool in gemstone identification. As with a typical critical angle refractometer, it will measure the Refractive Index of faceted stones..
This Gemological refractometer is a low cost, lightweight measuring instrument used by jewellers and traders of gemstones to measure polished stones over a refractive index range of 1.30 to 1.81 RI..
The instrument can also be used to identify whether a particular stone is Isotropic or Anistropic (uniaxial or biaxial)..
In fact, you can also use this tool to measure R.I. for many minerals in crystal form as long as the crystals have a flat and polished face..

❤DUAL SCALE:Rapidly and precisely display the Brix (0-32%) and Specific Gravity (1.000-1.130) at the same time, no need to switch unit for readings each time!.
❤ACCURATE READINGS WITH ATC: Hand Held Brewing Refractometerr with Automatic Temperature Compensation(ATC), the brix refractometer will account for changes in ambient temperature and automatically compensate accordingly to Provides accurate and repeatable measurements on easy to read scale..
❤EASY TO USE: Just take a drop or 2 of your brew on the prism and hold the refractometer to the light, then look through the eyepiece to get the reading. No lookup table needed and no waste! More accurate to measure sugars in verities of melon, fruits or juice..
❤WIDE USE: Ideal for Home Brew, Wine making, Agricultural, Gardening & Educational Purposes.Best choice for homebrew, wine making, and other purposes..
❤PORTABLE DURABLE & WARRENTY : Made with non-staining, non-corrosive and non-reactive aluminum material, light-weighted and portable, safe and durable. If you have any issue with your brix refractometer,please do not hesitate to contact us - your satisfaction is paramount!.

Ade Advanced Optics dual range refractometer measures the brix and specific gravity of your wort or wine.
Measures brix: 0-32 percent and specific gravity: 1.000-1.120.
Features atc (automatic temperature compensation) for accurate readings.
Aircraft aluminum body, premium optical lens, rubber eye guard.
A refractometer is easier and more accurate than a hydrometer for measuring sugars.

Measures dissolved oxygen concentration/saturation, pH, mV, conductivity, TDS, salinity, resistivity and temperature.
Automatic salinity compensation and manual barometric pressure compensation for DO measurements.
One button pH calibration (4, 7, and 10pH).
Choice of 3 point pH calibration for better accuracy.

Robinair's Coolant and Battery Refractometer is designed for use in measuring the freeze point of propylene or ethylene glycol based cooling systems and for checking the strength of electrolyte solution batteries.
Precision instrument features high-quality optics with ultra smooth focusing to ensure reliable, accurate test results.
When a liquid (such as coolant or charging liquid) is placed on the tools prism, the light passing through it is bent - the more concentrated the liquid, the more the light will bend.
Scale range: -60 degrees Fahrenheit to +32 Fahrenheit.
Complete kit includes refractometer with rugged aluminum housing, eyedropper, screwdriver, vial of distilled water, cleaning cloth, foam lined rigid plastic case, and more.

Antifreeze Refractometer for car. Designed for measuring coolant and antifreeze based on ethylene glycol or propylene glycol.
Requires only a few drops of sample Measurement in 2 seconds.
Power off: Meter will power off within one minute if no any operation.
With temperature display, freely switch operating. Automatic Temperature Compensation is an absolute necessity for refractometer.
Portable and Exquisite, Low power consumption, Anti-loss design.

●Provide precise salinity reading. ●Easy in operation and salinity reading. ●Smooth water flow design prevents the attachment of fine bubbles to increase measurement accuracy..