The 10 best aquarium refractometer for saltwater for 2022
Finding the best aquarium refractometer for saltwater suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.
Best aquarium refractometer for saltwater
1. AquaticHI Aquarium Refractometer for Saltwater/Brackish / Marine/Reef Tank Testing, Automatic Temperature Control, Salinity (0-100ppt) and Specific Gravity (1.000-1.070) (Standard Kit)
Feature
DUAL SCALE REFRACTOMETER: Measures in Salinity 0 - 100ppt and Specific Gravity 1.000 - 1.070IDEAL APPLICATIONS: Aquariums, Marine Monitoring, Agricultural, Gardening & Educational Purposes (Biology Projects)
AUTOMATIC TEMPERATURE COMPENSATION (ATC): Automated to provide accurate measurements even with temperature fluctuations
AFFORDABLE high quality while providing PROFESSIONAL testing equipment standards, accurate even at low salt levels
STANDARD PACKAGE INCLUDES: 1 Refractometer, 1 Hard Carrying Case, 1 Calibrating Screw Driver, 1 Pippet, 1 Cleaning Clothe, 1 Instruction Manual
Description
THROW AWAY YOUR INACCURATE HYDROMETER!USE A REFRACTOMETER TO PROVIDE ACCURATE READINGS TO MAINTAIN A HEALTHY AQUARIUM WITH CONSISTENT SALINITY LEVELS
Description
As a serious hobbyist the need for the best way to measure salinity and specific gravity is to use a refractometer to provide accurate measurements. The AquaticHI Aquarium Refractometer is used to PROFESSIONALLY measure the salinity and specific gravity of saltwater. ADJUSTABLE FOCUS to provide the sharpest display. Calibrate using distilled water or a solution with 35ppt. DUAL SCALE and full ATC (auto temperature compensation) to ensure greater CONSISTENCY and ACCURACY in everyday use. Compact and portable for use anywhere.
Measurement Scale:
Salinity: 0 - 100 ppt (parts per thousand) at 1 ppt resolution
Specific Gravity: 1.000 - 1.070 SG at .001 resolution
Standard Package Includes:
1 x Salinity Refractometer
1 x Hard Carrying Case
1 x Calibrating Screw Driver
1 x Pippet
1 x Cleaning Cloth
1 x Instruction Manual
Recommended Aquarium SG Range:
Brackish Water Aquariums: 1.005 to 1.010 SG
Marine Fish Only With Live Rock (FOWLR): 1.020 to 1.025 SG
Marine Reef Aquariums: 1.023 to 1.026 SG
2. Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent
Feature
It is designed for the measurement of seawater (marine aquaria) or very low concentrated salt solutions.Ideal for testing and monitoring aquariums,fish tank, saltwater pool,seawater...
Features automatic temperature compensation (ATC) and Dual Scale: Specific Gravity & Salt Percent.
Easy to Use - Just need 2-3 drops of solution, you can get accurate readings. And no battery needed.
Includes: a firm plastic case, a refractometer ,a cleaning cloth, a screw driver, an operating instructions, 3 suction tube.
Description
This refractometer is a portable, precision optical instrument. It's a convenient tool for the measurement of seawater (marine aquaria) or very low concentrated salt solutions. No battery needed.It features high-quality optics with ultra smooth focusing. Its main body is made of aluminum alloy. The internal optical lens with high refractive index make up the precision optical system.
Dual scale:One is specific gravity, range: 1.000-1.070 g/cm3, resolution: 0.001 g/cm3. Another is salt percent, range: 0-100 ppt ( or say parts per thousand), resolution: 1 ppt.
The usual salinity of selected aqueous solutions
Fresh water--------------<0.5 ppt
Brackish water--------------0.5 to 30 ppt
Saline water--------------30 to 50 ppt
Brine-------------->50 ppt
*Salinity 36 ppt means that there are 36 grams of salt in 1 liter aqueous solution.*
Notice:
1.Accurate measurement based on good calibration, please calibrate the refractometer before your first use. But you don't have to calibrate it frequently, once every a few months is OK.
2.When you put your sample to be tested on the daylight plate, make sure the liquid spreads across the entire surface of the prism without air bubbles or dry spots.
3.Clean the instrument with a soft cloth after each use, keep the refractometer dry and clean, which will keep the instrument accurate and durable. Do not put the entire instrument into water to wash, this may lead the
refractometer to be foggy or rusty inside.
Warranty:Full 12 Month Replacement Warranty & Any Questions Will be Answered within 24 Hours.
3. Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 Ppt with Automatic Temperature Compensation
Feature
Measure salt water or salinity of water, ideal for aquariums and marine monitoring.Measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand.
Features automatic temperature compensation.
Comes with hard case, dropper, screwdriver, user manual and cleaning cloth.
The main part is made of chromium, it's very durable.
Description
Refractometer for seawater and marine fishkeeping aquarium 0-100 pptDetails :
This optical refractometer (salinity meter) has scales in the range of 0 - 100 ppt(0 - 10 %). The reading resolution is 1 ppt. It is designed for the measurement of seawater (marine aquaria) or very low concentrated salt solutions.
The second scale is for reading of the salt solution density in range 1.000 to 1.070 g/cm3 (resolution 0.001 g/cm3).
The usual salinity of the selected aqueous solutions
1.Fresh water ---< 0.5 ppt
2.Brackish water---0.5 to 30 ppt
3.Saline water (Seawater)---30 to 50 ppt
4.Brine---> 50 ppt
(Salinity 36 ppt means, that there are 36 grams of salt in 1 liter aqueous solution.)
Measurement:
The liquid measurement is very easy. Place a few drops of the liquid on the optical part of the refractometer, cover the prism (the liquid will spread more easily over the prism), look throught the eyepiece against the light (focus, if necessary)
and you will be able to read the result value on the scale.
General technical parameters
reference temperature 20 Celsius
ATC - automatic temperature compensation (compensation range 0 ~ 30 Celsius)
focus possibility
length ~ 195 mm
quality technical design
Content and equipment
a firm plastic case
a refractometer
a cleaning cloth
3 suction tube
a screw driver
a operating instructions
4. Professional Automatic Temperature Compensation Salinity Refractometer for Aquariums, Marine Monitoring, Saltwater Testing.Dual Sacle: 0-100ppt & 1.000-1.070 Specific Gravity
Feature
Upgraded QualityPartable Hard Storage Box
Dual Salinity Scale
Automatic Temperature Compensation
Full 12 Month Replacement Warranty
Description
Brand new Salinity Refractometer that is used to measure the salinity levels of saltwater aquariums and the worlds oceans. Calibrate with either distilled water or a 35ppt Salinity standard. Wipe off the saltwater after each use. This unit comes with Automatic Temperature Compensation or "ATC". This feature allows you to get a reading outdoors when the temp is between 50'F-86" (10'C-30'C). If you test outside of temp range your readings will become gradually more and more inaccurate. For best results, test indoors. No batteries necessary as you only need strong light - daylight (sunny or cloudy) or a lamp/flashlight.5. Milwaukee MA887 Digital Salinity Refractometer with Automatic Temperature Compensation, Yellow LED, 0 to 50 PSU, +/-2 PSU Accuracy, 1 PSU Resolution
Feature
Laboratory testedYellow led display
Description
Milwaukee MA887 Digital Salinity Refractometer with Automatic Temperature Compensation, Yellow LED, 0 to 50 PSU, +/-2 PSU Accuracy, 1 PSU Resolution has a number of industrial applications. Samples are measured after a simple user calibration with distilled or deionized water. Within seconds, the refractive index and temperature are measured and converted into one of three popular measurement units; Practical Salinity Units (PSU), Salinity in parts per thousand(ppt), or Specific Gravity (S.G. (20/20))6. Vee Gee Scientific STX-3 Handheld Refractometer, with Salinity Scale, 0-100, +/-1.0 Accuracy, 1.0 Resolution
Feature
Handheld portable refractometer for measurement of salt concentration in parts per thousand (PPT) (0 to 100%) and specific gravity (SG) (1.000 to 1.070) of seawater in the 10 to 30 degrees C temperature rangeAutomatic temperature compensation (ATC) for immediate and accurate calibration readings, regardless of ambient temperature
Ambient light illuminates the scale; no additional power source is required
Durable metal and rubber outer shell with a telescope-shaped, streamlined design (40 x 40 x 185mm), a rubber grip to guard against hand heat for accurate measurements, and a non-roll stand to protect against damage
Optical glass prism mounted in all-metal housing for quick temperature equilibrium between sample and prism
Description
The VEE GEE STX-3 is a handheld, portable, water-resistant salinity refractometer that measures salt concentration in parts per thousand (PPT) in the 0 to 100% range and specific gravity (SG) of seawater in the 1.000 to 1.070 range, has automatic temperature compensation (ATC), and a durable metal body with rubber grip. A salinity refractometer measures the concentration of salt, such as sodium chloride, magnesium and calcium sulfates, in liquids and displays the results. Handheld refractometers, also known as sugar meters, concentration meters, or Brix meters, are commonly used in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, and ecological industries, and for water-testing applications.
This refractometer is housed in a durable metal body. The VEE GEE STX-3 features ATC for immediate, accurate readings, with an ambient temperature of 10 to 30 degrees C. The unit is factory-calibrated and can be calibrated with distilled water. Calibration can be controlled and adjusted with a tool-free calibration ring and a set screw. The outer shell is rubber coated with dimpled grip for easy gripping and the rubber coating guards against hand heat for accurate measurements. A non-roll stand prevents the unit from rolling when placed on a flat surface such as a table or bench top. The optical glass prism is mounted in an all-metal housing composed of copper alloy with a nickel-chrome coating for quick temperature equilibrium between the sample and the prism. The analog Brix scale features a bright, high-contrast display for clear visibility of the boundary and memory lines intersection. Instantaneous sample readings illuminated by ambient light are viewed through a monocular, focusable, cushioned eyepiece. The unit comes with a zippered vinyl carrying case, a plastic transfer pipet and an instruction manual.
Specifications
| Measurement scale range | Salinity (PPT) 0 to 100%, Seawater (SG) 1.000 to 1.070 |
| Specimen measurement temperature range | 10 to 30 degrees C |
| Accuracy | Salinity + or 1.0%, Seawater (SG) + or 0.001, Temperature + or - 1 degrees C |
| Resolution | Salinity 1.0%, Seawater (SG) 0.001, Temperature 1 degrees C |
| Ambient temperature for unit operation | 10 to 30 degrees C |
| Sample volume | > 0.1ml |
| Measurement time | Instantaneous |
| Body type | Copper alloy with a nickel-chrome coating |
| Illumination | Ambient light; unit requires no additional power source |
| Dimensions | 40 x 40 x 185mm (H x W x D) |
| Weight | 285g |
| Warranty | One year |
H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.
Refractometers are used to determine substance content in a sample, to provide unit readings of substances including Brix, salinity, and alcohol; to detect chemical impurities, or to measure components of samples such as industrial fluid. Refractometers measure the refractive index of a substance, which is its optical characteristic, and the number of dissolved particles in it. The refractive index is the ratio of the speed of light in empty space to the speed of light in a substance; when light passes from one medium to another. Generally, a low concentration sample has a larger angle of refraction than a high concentration sample. For example, a straw placed in a high-concentration substance appears more bent than when placed in a low-concentration substance. Refractometers can work with natural light, or with an external power source such as batteries or electricity. They typically have either a digital or analog reading display, though some units utilize both types. Some analog-display refractometers can be used for both solids and liquids. Digital-display refractometers are used exclusively for liquids. Types of refractometers include handheld, benchtop, and in-process. Handheld refractometers are elongated and telescope-shaped, or shorter and rectangular. Analog handheld refractometer readings are obtained by looking through the monocular eyepiece and viewing where the boundary line intersects with the memory line. Digital handheld models provide a digital readout. Benchtop refractometers typically measure with a higher degree of accuracy than handheld units. In-process refractometers are used for continuous process monitoring and data readouts, and are generally fitted into a piping system for ongoing analysis. Refractometers are used in a wide variety of applications in the culinary, food and beverage, pharmaceutical, educational, geological, chemical, ecological, and automotive industries, and for water-testing applications.
VEE GEE Scientific manufactures laboratory equipment and supplies, and makes the VanGuard brand of products. The company, founded in 1981 and headquartered in Kirkland, WA, offers scientific equipment for educational, research, clinical, and industrial applications.
Whats in the Box?
- STX-3 refractometer
- Vinyl carrying case
- Plastic transfer pipet
- Instructions
7. Ade Advanced Optics Dual Scale 1.0 to 1.070 S.G. Salinity Refractometer for Aquarium & Seawater
Feature
Ade Advanced Optics-Dual range refractometer. Ranges: 0-100 ppt of Salinity and 1.000 to 1.070 Specific GravitySturdy design, compact in size and light in weight, convenient to keep up and carry around.
Features ATC (Automatic Temperature Compensation) for accurate readings.
Easy to calibrate and has adjustable manual focusing.
The refractometer is made from aircraft aluminum and offers you the ability to easily take your readings.
Description
Ade Advanced Optics SSA0010 dual scale salinity refractometer is used to measure, monitor and control the concentration of salt water and brine, especially useful for aquarium and marine applications. This high quality refractometer measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult to read hydrometer. With just a couple of drops of aquarium water you know exactly what your salinity is.8. Aquarium Salinity Refractometer with ATC Uglyfish Seawater Refractometer,Dual Scale 0-100 PPT of Salinity and 1.000 to 1.070 Specific Gravity (0-10%) for Pool, Tank, Marine Monitoring Industry
Feature
Measuring Ranges: The salinity refractometer is 0-100 ppt of Salinity and 1.000 to 1.070 Specific Gravity (0-10%)the reading resolution is 0.1 %. Salinity Accuracy: +/-0.1%ADVANCED AUTOMATIC TEMPERATURE COMPENSATIONATCTECHNOLOGY (10~10) Adjust Automatically to Compensate for Temperature, Which makes it even easier to get fast results
SIMPLY USE: Using the dropper to take a sample of wort and put it on the prism. Then hold the refractometer up to the light and look scale through the eyepiece, more accurate to measure salinity in food
WIDE USE: The Salinity Refractometer is ideal for aquariums, marine monitoring, Agricultural, Gardening & Educational Purposes
PORTABLE AND DURABLE: Easy to use,sturdy design, compact in size and light in weight, convenient to keep up and carry aroundand carry around
Description
This dual scaleUglyfishsalinity refractometer is used to measure, monitor and control the concentration of salt water and brine, especially useful for aquarium and marine applications. This high quality refractometer measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult to read hydrometer. With just a couple of drops of aquarium water you know exactly what your salinity is.
The usual salinity of the selected aqueous solutions
1.Fresh water ---< 0.5 ppt
2.Brackish water---0.5 to 30 ppt
3.Saline water (Seawater)---30 to 50 ppt
4.Brine---> 50 ppt
Specifications
Measuring Range: 0-10% Salinity
Division: 0.2% Salinity
Accuracy: 0.2%
ATC: 0-10C
Reference Temperature: 20C
Item Length: 17.2 inch
Item Weight: 3.5ounces
Shipping weight: 9ounces
Shipping size: 6.77 x 3.54 x2.36 (inch)
Package included:
1 x Uglyfish SalinityRefractometer
1 x Plastic Pipette
1 x Mini Screw Driver
1 x User Manual
1 x Cleaning Cloth
1 x Plastic Box
Matters Needing Attention:
- Don't submerge the unit in water.
- Don't use solvent to clean plastic lens.
9. Hamh Optics&Tools Professional Automatic Temperature Compensation Salinity Refractometer for Aquariums, Marine Monitoring, Saltwater TestingDual Sacle 0-100ppt & 1.000-1.070 Specific Gravity.
Feature
It is more accurate than a hydrometer and easy to measure. Designed for the testing the concentration of salt water and brine, perfect for use with aquarium Marine monitoring and quality control in scientific research and clinical laboratoriesMeasurement range: Salinity 0 - 100 ppt, (0 - 10% salt content), SG 1.000 to 1.070 SG, Resolution: Salinity +/-1 ppt; +/-0.001 SG
Easy to use. Place 2 drops sample on the main Prism and close the panel and hold the refractometer up to the light and look through the eyepiece.
The refractometer's body and the retaining ring are made of brass and chrome plated. The internal optical lens with high refractive index make up the precision optical system.
Please ignore reviews from Diver. This commentator has a suspicion of being hired. Seller opponents use unfair means to compete
Description
Technical Description:
The product is designed for testing the concentration of salt water and brine. Provides a direct reading of the specific weight and concentration (Part per thousand) of salt in water.
It gives you reliable refractive index and Salinity values of the dissolved solids of watery solutions. It is used for by our quality control in research and clinical laboratories.
It can be used to check stem solutions and thinners and to hold.
In the food industry it is particularly effective on the preparation of frozen vegetables, fruits, sea fruits and ocean by-products.
The Salinity Refractometer is also available in ocean ographie and saltwater studies for determining the soil quality.
The model with ATC (Automatic Temperature Compensation) is ideal for general use in the field.
Specification:
Material:The metal part is made of brass chrome.
Quantity: 1pcs
Color: As shown
Measure Range: 0-100ppt(0-10%); Min:1ppt
Salinity Proportion: 1.000-1.070sg; Min:0.001
Size: 4*20cm / 2.1*0.9*0.9" (D*H)
Package:
1*Salinity Refractometer
1*Cleaning Cloth
1*Pipette
1*Mini screw driver
1*Hard Case
1*User Manual
Guarantee: Offers 1 year warranty
10. SunGrow Measure Salinity of Water with Aquarium Refractometer Remarkable Accuracy - Includes Calibration Tool - Ensures Overall Health of Plant and Marine Life - Easy and Clear Reading
Feature
SPECIFICALLY DESIGNED REFRACTOMETER FOR SALTWATER AQUARIUM--The algorithm is made specifically for testing seawater and saltwater. This is different than a standard refractometer which is not calibrated to check salinity of aquarium water and will give an error in your readings.AUTOMATIC TEMPERATURE CALIBRATION --- The calibration process should be carried out with both the room and the instrument at 68 F. The refractive index of a liquid changes with temperature. Due to the automatic temperature calibration, any changes in ambient temperature from 50 F- 86 F will not affect the accuracy of the reading.
EASY AND CLEAR READING FOR SALTWATER AQUARIUMS AND REEF TANKS--- The refractometer comes with a focus adjustment on the eyepiece, this will give you clarity of the optics and a sharp line for easy reading.
COMES IN A SOLID CASE INCLUDES PIPETTE AND CALIBRATION TOOL --- This 7.6 inches refractometer is not only built extremely well, but it comes with a durable hard case for safe and easy storage of the refractometer when not in use. It also includes a calibration tool and a pipette.
KEEP YOUR FISH AND PLANT LIFE IN OPTIMAL HEALTH--- Clean, pure saltwater is crucial for the vitality of your marine or reef aquarium. Use this refractometer to measure the salinity of the water, the target level of salinity in a reef tank should be 35 ppt.
Description
This refractometer is the best way to measure salinity and specific gravity of aquarium water. This instrument is very affordable and can be used to monitor the conditions of reef tanks and saltwater aquariums.How to Use:
Using the pipette that comes with this refractometer, place 1 to 2 drops of aquarium water onto the prism glass and close the plate cover. Once the drop of water are on the surface, the refractometer can accurately measure the light that is refracted through the water droplets. It uses a specific algorithm for measuring seawater. Look through the eyepiece and view the scale. The top part of the scale appears blue and the bottom part appears white. Take your reading at the intersection of these two colors. One side of the scale measures salinity and the other side measures specific gravity.
Perfect Salinity Level for Aquarium:
Usually a stable level of 35 ppt is ideal for most reef tanks and marine aquariums.. In different oceans the salinity will vary from from 5 ppt in the Northern Baltic Sea to 40 ppt in the Northern Red Sea. The level that you keep your aquarium at, should be determined by the type of animals that you keep in the tank. If you only have fish in your saltwater aquarium, you will need to maintain lower salinities, at levels of 29 ppt. This will exert less osmotic stress on your fish. Reef systems on the other hand will thrive with stable levels of 35-36 ppt.
Maintaining your Refractometer:
Ensure that the prism of your refractometer is clean by using a soft damp cloth. Wipe over the prism plate and cover after each use. Failure to clean the refractometer after each use will lead to inaccurate results and will damage the prism coating.
This is an optical instrument that requires careful handling and correct storage. Do not immerse the instrument into any water, and do not expose to any corrosive and abrasive chemicals.
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