Editor's Choice - Our Favorite Sinotech Aquarium Hydrometers

1. Sinotech Hand Held Brix Honey Refractometer Rhb-90atc withCalibration Oil

Sinotech First Impressions

"This tool does that."

When I compared it to what my local pet store was reading my water at it was dead on. I would recommend this product to anyone that has a marine aquarium. Great product I used for beer making and my saltwater aquarium. Plus it is super easy to use and clean. I don't want to deal with temperature correction or. Get precise salinity readings in moments. Does just as good of a job of any meter you would buy at the store!

  • Sinotech Hand Held Brix Honey Refractometer Rhb-90atc withCalibration Oil
  • Test Fruit Brix And Honey Water
  • Heavy-duty and lightweight With its aluminum construction
  • ATC CompensationRange: 10°C~30°C (50°F~86°F)
  • Protable Type
  • 58-90%Brix 38-43 Be° (Baume) 12-27% Water
  • Manufacture: Sinotech
  • Editor's Impressions Of The Sinotech
  • Accuracy [star rating='3.4']
  • Quality [star rating='3.2']
  • Value For Money [star rating='2.5']
  • Affordability [star rating='3.4']

Sinotech Final Thoughts

"NO BUBBLES!"

I bought this and a hydrometer because of the reviews saying its not accurate. I compared the readings using this hygrometer and the calibrated refractometer. Works great,& comes in a storage box. Used distilled water to calibrate, the screw is located under the rubber cap. So worth it considering its great quality and great price. My only criticism would be that it's a little too dark. This requires repeatedly tapping the arm with a pencil.

Overall Score
3.0

[star rating="3"]
(1 Points)

2. Hikari AccuProbe Aquarium Hydrometer, Mini

User Ratings: 55 45

Hikari 96005 First Impressions

"NO BUBBLES!"

However, the numbers are soooo small it is sometimes hard to read. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. It's fast, it's tidy, and it's accurate. I did NOT calibrate, but am getting accurate readings. Definitely a lot cheaper than a refractometer. Ultimately, the measurement was exactly the same as our old tester. Calibrate with distilled water and test every so often.

  • Hikari AccuProbe Aquarium Hydrometer, Mini
  • Ideally suited for use in Nano tanks, smaller setups or sumps of larger systems
  • Accurate to 0.001 specific gravity and salinity (PPT) measurements
  • Durable construction for extended life
  • Designed to give a temperature-corrected reading in warm water aquariums – 68°F to 85°F (20°C to 30°C)
  • Readings can be taken by taking the meter out of the aquarium and placing on a level surface or leveling the unit in the substrate
  • Manufacture: Phillips Feed & Pet Supply Natural Balance
  • Product Dimensions: 5.2 x 1 x 3.5 inches; 0.8 Ounces
  • Editor's Impressions Of The Hikari 96005
  • Accuracy [star rating='3.9']
  • Quality [star rating='3.8']
  • Value For Money [star rating='2.2']
  • Affordability [star rating='4']

Hikari 96005 Final Thoughts

"Just got it."

Next I calibrated the refractor with the calibration solution that I ordered too. Just give me one simple, accurate reading to go by, and I'm happy. Once I figured that out, it works great. So worth it considering its great quality and great price. Ultimately, the measurement was exactly the same as our old tester. Wipe down glass surface to dry it and put it back on the shelf til next time. It's a basic but reliable refractomer I use it for my aquariums.

Overall Score
3.2

[star rating="3.2"]
(2 Points)

3. ZRM&E Seawater Hydrometer for Aquarium Aquaculture Seawater Densimeter Ocean Hydrometer Salinity Met...

User Ratings: 70 30

ZRM&E First Impressions

"Gave me confidence."

YOU WILL NOT get an accurate reading if there are bubbles on the needle. I have purchased before will buy again! I felt it wasn't accurate which was verified by my LFS. Very quick to calibrate and to use. It says in the instructions to use distilled water. I bought this refractometer as a more accurate option for salinity than a hydrometer. Don't spend your money on calibration solution.

  • ZRM&E Seawater Hydrometer for Aquarium Aquaculture Seawater Densimeter Ocean Hydrometer Salinity Meter for Fish Tank Salinity Specific Gravity Test
  • Made of high quality plastic, aquarium transparent, automatic accurate reading brine hydrometer
  • Accurate, durable and easy to read salt and specific gravity of your marine aquarium, small and waterproof. If the specific gravity is between 1.000-1.019, it indicates that the specific gravity is low; if the specific gravity is between 1.020-1.023, it indicates that the specific gravity is normal; if the specific gravity is between 1.024-1.030, it indicates that the specific gravity is high
  • The external range of the scale indicates salinity (PPT), and the internal range of the scale indicates gravity. And clearly mark the safe area. Application range: 0-40 degrees (1.000-1.030). If the salinity PPT is between 32-40, it indicates that the salinity is high; if the salinity PPT is between 27-31, it indicates that the salinity is normal; if the salinity PPT is between 0-26, it indicates that the salinity hydrometer is low
  • Wide range of applications: Suitable for salt water and sea water fish tanks. Perfect for testing salinity and specific gravity of saltwater and seawater tanks, including solubility and specific gravity scales. Suitable for fresh water and sea water
  • Easy to read swing arm pointer and ultra wide stable base can provide accurate test results
  • Manufacture: DGHP
  • Editor's Impressions Of The ZRM&E
  • Accuracy [star rating='2.9']
  • Quality [star rating='3.8']
  • Value For Money [star rating='4']
  • Affordability [star rating='3.2']

ZRM&E Final Thoughts

"Great Product, Thanks!"

YOU WILL NOT get an accurate reading if there are bubbles on the needle. Get precise salinity readings in moments. If you let it sit in the tank overnight, it definitely gives an accurate reading. Compare it with the refractometer and adjust the refractometer so that it matches. Don't care much for having to post a review in order to activate warranty. Even the smallest bubble will throw the measurements way, way off. I would recommend this product to anyone that has a marine aquarium.

Overall Score
3.8

[star rating="3.8"]
(4 Points)

4. LemonBest 0%-10% Automatic Temperature Compensation Salinity Refractometer Salt Water Aquariu...

User Ratings: 75 5

LemonBest First Impressions

"Great tool."

I don't want to deal with temperature correction or. When I compared it to what my local pet store was reading my water at it was dead on. Used distilled water to calibrate, the screw is located under the rubber cap. This one here was much cheaper,& exactly the same as they sold in the store. At first, I was getting bubbles sticking to the rotating arrow. Definitely a lot cheaper than a refractometer. I decided to upgrade and it was easy to calibrate.

  • LemonBest 0%-10% Automatic Temperature Compensation Salinity Refractometer Salt Water Aquarium by Lemonbest
  • Features with automatic temperature compensation (ATC) function
  • Designed for testing the concentration of salt water and brine, ideal for aquariums, marine monitoring and quality control in research and clinical laboratories
  • With just a couple of drops of aquarium water you know exactly what the salinity is
  • Measures on 2 scales, specific Gravity (D 20/20) and parts per thousand (‰), provides a direct reading of the specific gravity and concentration of salt in water
  • Comes with a hard case, dropper, screwdriver and cleaning cloth
  • Manufacture: Lemonbest
  • Product Dimensions: 7.87 x 1.57 x 1.57 inches; 3.88 Ounces
  • Editor's Impressions Of The LemonBest
  • Accuracy [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

LemonBest Final Thoughts

"Easy to use."

Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. It works OK but seems pretty flimsy and it's feel that way. My only criticism would be that it's a little too dark. I don't know if that's a positive or negative but just different. Just rinse with warm water afterwards. I bought this and a hydrometer because of the reviews saying its not accurate. Pretty darn accurate for the price.

Overall Score
4.5

[star rating="4.5"]
(315 Points)

5. Eyourlife Salinity Refractomer Aquarium Optical Optics Refractometer with Auto Temperature Compensat...

User Ratings: 64 8

Eyourlife First Impressions

"So easy to use."

Great tool if you have a salt-water fish tank or a decorative pond. Ultimately, the measurement was exactly the same as our old tester. I have purchased before will buy again! Great product I used for beer making and my saltwater aquarium. I would suggest purchasing the salt calibration solution. I tried it over and over and no bubbles! Very quick to calibrate and to use.

  • Eyourlife Salinity Refractomer Aquarium Optical Optics Refractometer with Auto Temperature Compensation ATC Digital Dual Scale Salinity Meter Hydrometer Specific Gravity for Saltwater Seawater Marine
  • SALINITY REFRACTOMETER for measuring the salinity of salt water quickly and accurately, ideal for agriculture, industry and research application, such as Mariculture, Fish Culture, Aquarium, Marine Survey, Water Quality Monitoring, Salt Production, Manufacture of Normal Saline, Salinity Measurement in Food Processing etc. It can also be used for medical institutions and university research.
  • DUAL SCALES: The Refractometer is a equipment to measure the liquid concentration(the concentration of salt) by using the light, working basis on that the liquid with different concentrations have different light refractive index. The Measures on 2 scales: Specific Gravity (0.001, Range: 1.000 - 1.070, D 20/20,) and Parts Per Thousand (1‰, Range: 0-100‰).
  • ATC FUNCTION: Automatic Temperature Compensation during 10-30℃, eliminating data errors caused by temperature changes and guaranteeing a consistent accurate result.
  • WITH DURABLE STORAGE CASING: With a sturdy and light weighted case, it is very convenient to storage and carry. The body is made of stainless steel and is very durable, the eyepiece is in high quality for better viewing, adopting optical glass lens rather than plastic lens for accurate measurement.
  • PACKAGING: 1 x Salinity Refractometer, 1 Pipette, 1 x Instruction manual, 1 x Mini screwdriver, with a durable storage case.
  • 1 x Salinity Refractometer
  • 1 x Pipette
  • 1 x Instruction Manual
  • Manufacture: Eyourlife
  • Product Dimensions: 7.91 x 2.99 x 2.2 inches; 5.6 Ounces
  • Editor's Impressions Of The Eyourlife
  • Accuracy [star rating='3.9']
  • Quality [star rating='3.4']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='5']

Eyourlife Final Thoughts

"And accurate."

I've checked about 5 times with the hydrometer and each time has been near perfect. Great tool if you have a salt-water fish tank or a decorative pond. But there are some ways to keep on getting accurate readings. Pretty darn accurate for the price. So worth it considering its great quality and great price. Does just as good of a job of any meter you would buy at the store! It is a little cheaper made but it works great for the cost!

Overall Score
4.4

[star rating="4.4"]
(18 Points)

6. emours Aquarium Gloves Waterproof Elbow Length Long Sleeve Scratch Resistant Work Gloves 27-Inch

User Ratings: 71 6

emours First Impressions

"Great product."

At first, I was getting bubbles sticking to the rotating arrow. I decided to upgrade and it was easy to calibrate. The water was at what I expected it should be. Pretty darn accurate for the price. I don't want to deal with temperature correction or. Wipe down glass surface to dry it and put it back on the shelf til next time. When I'm testing my aquarium water, I want immediate, clear results.

  • emours Aquarium Gloves Waterproof Elbow Length Long Sleeve Scratch Resistant Work Gloves 27-Inch
  • Material: Polyvinyl chloride (PVC) + knit cloth; durable
  • PVC material is chemical and scratch resistant. With velvet inner, can keep your hand warm even in the cold water environment.
  • 27-Inch extra long design. Can keep your hand from getting wet inside the tank .Hand portion size:18x12.5cm/ 7 x 4.9inch ( L x W) ,one size fits most all(medium to large size); with elasticated cuffs, protects hands and arms up to the shoulder;
  • Thicken material,fully lined,waterproof. Keep your hands and arm dry when changing fish tank water, also can prevent allergies, cuts during aqua maintenance;
  • Multifunctional. Can be used in aquarium cleaning, also can be used in aquatic seafood fishing operations.
  • Manufacture: Kensid
  • Editor's Impressions Of The emours
  • Accuracy [star rating='3.7']
  • Quality [star rating='3.5']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='4.3']

emours Final Thoughts

"Great price."

My only criticism would be that it's a little too dark. This one here was much cheaper,& exactly the same as they sold in the store. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. Calibrate with distilled water and test every so often. At first, I was getting bubbles sticking to the rotating arrow. Now that it's calibrated I love it! Compare it with the refractometer and adjust the refractometer so that it matches.

Overall Score
4.4

[star rating="4.4"]
(40 Points)

7. Aquarium Salinity Refractometer for Brackish/Marine/Reef Tank Testing,Hobein Dual Scale Automatic Te...

User Ratings: 68 6

Hobein First Impressions

"Calibrate it, use it."

And always make sure there is no bubbles on the measuring unit. When I compared it to what my local pet store was reading my water at it was dead on. Be sure to adjust the focus by turning the eye focal when you first receive. Plus it is super easy to use and clean. Be sure to adjust the focus by turning the eye focal when you first receive. Was calibrated and worked perfect right out of the box. It is easy to read and perform the procedure in seconds.

  • Aquarium Salinity Refractometer for Brackish/Marine/Reef Tank Testing,Hobein Dual Scale Automatic Temperature Compensation 0-100ppt & 1.000-1.070 Specific Gravity with ATC
  • ❤DUAL SCALE: Measuring Ranges: 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%
  • ❤APPLICATIONS: Aquariums, Marine Monitoring, Agricultural, Gardening & Educational Purposes (Biology Projects)
  • ❤EASY TO USE:Automatic Temperature Compensation (ATC),Just need 2-3 drops of solution,you will be able to read accurately the result
  • ❤PORTABLE AND DURABLE: Made with non-staining, non-corrosive and non-reactive aluminum material, light-weighted and portable, safe and durable
  • ❤PACKAGE INCLUDES: 1 Refractometer, 1 Carrying Case, 1 Calibrating Screw Driver, 2 Pippets, 1 Cleaning Clothe, 1 Instruction Manual
  • Manufacture: Hobein
  • Editor's Impressions Of The Hobein
  • Accuracy [star rating='5']
  • Quality [star rating='4.9']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='4.7']

Hobein Final Thoughts

"This tool does that."

Even the smallest bubble will throw the measurements way, way off. It came with all that was listed in the in production description. All very easy and I feel as though I am getting an accurate salinity reading. So once your instant ocean shows a measurement. But there are some ways to keep on getting accurate readings. Too that makes it appear too cheap. Excellent piece of equipment for the price.

Overall Score
4.4

[star rating="4.4"]
(290 Points)

8. Hikari AccuProbe Aquarium Hydrometer, Full

User Ratings: 68 10

Hikari 96010 First Impressions

"Couldn't be happier."

This device is a godsend and so much easier and cleaner to use. Bought this as a back up refractometer. I bought this salinity meter for my aquarium. My corals will be much happier now. I can check the water in 5 seconds without squinting. A hydrometer for making sure you have the right saltwater mix. Pretty darn accurate for the price.

  • Hikari AccuProbe Aquarium Hydrometer, Full
  • "Dry Hands" design avoids contamination of aquarium or water sample
  • Accurate to 0.001 specific gravity and salinity (PPT) measurements
  • Auto-temperature correcting design
  • Designed to give a temperature-corrected reading in warm water aquariums – 68°F to 85°F (20°C to 30°C)
  • Self-leveling, hanging device included
  • Manufacture: Phillips Feed & Pet Supply Natural Balance
  • Product Dimensions: 11 x 1 x 4 inches; 3.2 Ounces
  • Editor's Impressions Of The Hikari 96010
  • Accuracy [star rating='4.8']
  • Quality [star rating='3.8']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='4.9']

Hikari 96010 Final Thoughts

"Easy to use."

There are conversion charts and tables online. If you let it sit in the tank overnight, it definitely gives an accurate reading. Very easy, turn screw very slowly to calibrate. The water was at what I expected it should be. Does just as good of a job of any meter you would buy at the store! If you read the directions in the box for the refractometer it's for freshwater. Used distilled water to calibrate, the screw is located under the rubber cap.

Overall Score
4.3

[star rating="4.3"]
(9 Points)

9. Ade Advanced Optics aaosal-B Automatic Temperature Compensation Sea Water Salinity Refractometer for...

User Ratings: 26 41

Ade Advanced Optics aaosal-B First Impressions

"Be well my friend."

Comes with a nice carrying case for easy and secure transportation. I have gone two years in this hobby with a hydrometer. It says in the instructions to use distilled water. Good quality and simple to use refractometer. The refractor was off out off the box. It is heavy and easy to read in any light. I use this for my 10g brackish and it works ok.

  • Ade Advanced Optics aaosal-B Automatic Temperature Compensation Sea Water Salinity Refractometer for Aquarium, 0% - 10% and 1.0 to 1.070 S.G. Dual Scale Hydrometer, Black
  • Manufacture: Ade Advanced Optics
  • Editor's Impressions Of The Ade Advanced Optics aaosal-B
  • Accuracy [star rating='2.2']
  • Quality [star rating='3.2']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='3.1']

Ade Advanced Optics aaosal-B Final Thoughts

"Couldn't be happier."

Would be nice if stem were slightly larger for easier read. Looks to provide very accurate readings. Works well on my Saltwater Aquarium. I've tried several different refractometers now and they are mostly the same. 027, I'm so glad I bought this one and it came spot on. I use this to check the specific gravity of my marine aquarium. I felt it wasn't accurate which was verified by my LFS.

Overall Score
3.0

[star rating="3"]
(4 Points)

10. Kocome Marine Hydrometer Reef Fish Tank Aquarium Water Salinity Specific Gravity Tester

User Ratings: 71

Kocome First Impressions

"Great kit."

I use this for my 10g brackish and it works ok. Plus it is super easy to use and clean. I did NOT calibrate, but am getting accurate readings. I needed this product and it is a lot less expensive than the local aquarium store. It's fast, it's tidy, and it's accurate. But with alittle persistance I am able to read it. Don't care much for having to post a review in order to activate warranty.

  • Kocome Marine Hydrometer Reef Fish Tank Aquarium Water Salinity Specific Gravity Tester
  • Accurate and easy to read.
  • Size: 3.54×4.72×0.59in (Approx.).
  • Readings are temperature-corrected & accurate to +/- 0. 002 specific gravity units which range from 1. 000 - 1. 030 specific gravity.
  • It is optimum to be put into below 6" deep water, so it can avoid the error from the oil slick.
  • Perfect for testing both salinity and specific gravity of your brackish and marine tank.
  • Manufacture: KOCOME
  • Editor's Impressions Of The Kocome
  • Accuracy [star rating='3.6']
  • Quality [star rating='4.2']
  • Value For Money [star rating='4']
  • Affordability [star rating='3.9']

Kocome Final Thoughts

"026 as expected."

I would recommend you to purchase this and skip the other ones. I have tried others before but this has given me accurate and stable results. On the shaft of the refractometer, there's a little, rubber-covered nub. I couldn't decide between this and one of the float arm meters or both. Very easy, turn screw very slowly to calibrate. Looks to provide very accurate readings. The instant ocean hydrometer will always be right.

Overall Score
4.6

[star rating="4.6"]
(9 Points)

Copyright © 2022 Rob Aquatics — Primer Child WordPress theme by GoDaddy