Best AQUARIUM HYDROMETERS
At Aquarium Accessories Reviews, we take pride in our rigorous review process. Each product is handpicked based on market research, personally tested by our experienced team for functionality and durability, and evaluated for value for money. Alongside our hands-on experience, we also consider real user feedback. This meticulous approach ensures we provide honest, transparent, and comprehensive reviews to guide your aquarium accessory purchases.
1
Exo Terra Terrarium Hydrometer
Brand: Exo Terra
4.2 ✓
2
Coralife Aquarium Fish Tank or Terrarium Digital Thermometer
Coralife Store
4 ✓
3
Chef Craft Basic Nylon Tube Baster, 11.5 Inches in Length, White/Blue
Brand: Chef Craft
4.4 ✓
4
Sera CO2-Tabs Plus 20 Tabl., 3.2 oz. Aquarium Test Kits
Brand: Sera
4.2 ✓
5
Coralife Aquarium Fish Tank Water Test Hydrometer 11 INCH
Coralife Store
4.2 ✓
6
American Marine PINPOINT Salinity Monitor + Calibration Fluid
Brand: Pinpoint
4.4 ✓
7
SP Bel-Art, H-B DURAC Salt Brine Hydrometer; 0/100 Percent by Saturation (B61809-0000)
SP Bel-Art Store
4.2 ✓
8
Sera Marin Hydrometer
Brand: Sera
3.9 ✓
9
Fluval Sea Hydrometer for Aquarium, Medium
Brand: Fluval
3.7 ✓
10
Thomas Specific Gravity Hydrometer, 0.8 - 0.9 Gravity Range, 150mm Length
Brand: Thomas
5 ✓
We will continue to update this buyer's guide once a month or two.
The best AQUARIUM HYDROMETERS in 2024 - Detailed Product Descriptions
1. Exo Terra Terrarium Hydrometer
More PhotoWipe clean
Analog hygrometer
Adhere the hygrometer in the terrarium
Clear analog dial display
Easy to read and install
Great for monitoring the humidity levels
2. Coralife Aquarium Fish Tank or Terrarium Digital Thermometer
Attaches to aquarium via small suction cup
3 foot long temperature probe for large size aquariums
Battery included
Ideal for aquariums and terrariums
Readings to 0.1-degrees Fahrenheit or Celsius
3. Chef Craft Basic Nylon Tube Baster, 11.5 Inches in Length, White/Blue
11 1/2 inch length allows you to keep your hand away from tube
Nylon is heat resistant to 450'F
Easily drizzle sauces over your meats to keep them moist while you cook
Great for turkey, pork chops, chicken, and more!
Handwashing is recommended
4. Sera CO2-Tabs Plus 20 Tabl., 3.2 oz. Aquarium Test Kits
By Brand: Sera
Country Of Origin : Germany
The Package Height Of The Product Is 4.92 Inches
The Package Length Of The Product Is 0.87 Inches
The Package Width Of The Product Is 0.87 Inches
5. Coralife Aquarium Fish Tank Water Test Hydrometer 11 INCH
Coralife is one of the market’s leading manufacturers of premium aquarium products.
Coralife's Hydrometer takes a true water sample at six inch depth.
Easy to read and accurate this specific gravity meter is designed to give temperature-corrected readings in warm water aquariums.
7. SP Bel-Art, H-B DURAC Salt Brine Hydrometer; 0/100 Percent by Saturation (B61809-0000)
Used for measuring sodium chloride saturation of salt brines in various industries including food, fishing, and transportation
Range: 0 to 100% by saturation; Divisions: 1%; Accuracy: ±1%; Length: 280 mm (11")
Individually serialized; Lead free ballast and glass
Temperature standardization: 60°F (15°C)
Packaged with a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy indicating accuracy traceable to NIST
8. Sera Marin Hydrometer
By Brand: Sera
Country Of Origin : China
The Package Height Of The Product Is 7.48 Inches
The Package Length Of The Product Is 2 Inches
The Package Width Of The Product Is 1.38 Inches
9. Fluval Sea Hydrometer for Aquarium, Medium
Helps measure specific gravity and salt level in marine aquariums
Features large, easy to read markings
Simple design-blends in easily
Item Package Weight: 0.185
10. Thomas Specific Gravity Hydrometer, 0.8 - 0.9 Gravity Range, 150mm Length
0.8 to 0.9 Specific gravity range
For liquids lighter than water
Use for testing small quantities
+/-2 Tolerance
45mm Graduated scale length
11. SP Bel-Art, H-B DURAC 0/12 Degree Baume Hydrometer (B61804-0000)
DURAC Baume plain form hydrometer is for use with liquids heavier than water
Range: 0 to 12; divisions: 0.1; accuracy: 0.1 Baume
300mm (11.8) in length
Individually serialized; features a metal ballast
Tested and calibrated in our exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB
12. Taam ATA02971 Hydrometer/Thermometer for Aquarium
By Brand: TAAM
Taam hydrometer/thermometer
Made by taam
Taam, inc Manufactures aquarium and pond products
13. Ai MCK2000W Marine Cover with Retractable Door White
By Brand: AI
Marine Cover With Retractable Door White
Factory look when complete
The country of origin is United States
Finest material for good fit and durability
Instructions and hardware included
14. Thermco GW2511 Plain Form Salt Brine Hydrometer, Sodium Chloride, 0 to 100% Range, 1° Division
Suitable for Certification
Standard Temperature 60’F/60°F
Salt Brine Hydrometers (Salometers) Measure the Saturation of Salt in an Aqueous Solution
Unit count: 1.0
15. Naruekrit R3-XIKQ-AD0G Proof and Tralle Hydrometer with 12" Glass Test Jar
Accurately measures percentage alcohol in unsweetened distilled beverages
Comes in a nearly unbreakable square accordion case
A quality instrument up to 20 percent more accurate than the Silver tip hydrometer
12 inch
Used for distilled spirits and is NOT for beer and wine
16. SP Bel-Art, H-B DURAC 1.200/1.420 Specific Gravity Shatterproof Plastic Hydrometer (B61800-0300)
Made from optical quality polycarbonate plastic material; durable and shatterproof; ideal in situations where rough handling or contamination could be an issue
Measures specific gravity / relative density (g/cm3) of a variety of liquids; Range: 1.200/1.420
Easy to read black scale on yellow back to help avoid eye fatigue
Individually serialized; lead free ballast
Packaged with a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy indicating accuracy traceable to NIST; Former HB #4905
17. Salifert OXPT Oxygen Test Kit
Corals and marine fish require very high levels of oxygen concentration because of the low solubility of oxygen in salt water so it is very important to regularly test the level of oxygen present
The Salifert Oxygen Profit-Test is extremely fast, measuring oxygen levels in just a few minutes and is scaled from 2 - 14 mg/L
Sufficient for up 40 tests
Can be used for marine, fresh and garden pond water
Made in Holland
18. Aquarium Life Support Systems Reefractometer
By Brand: Aquarium Life Support Systems
Salinity range 1 to 100Ppt
Specific gravity: 0.001
Accuracy 0.1 percent
Anti-slip rugged body
19. Two Little Fishies AccuraSea Seawater Reference and Calibration Solution
Great for Refractometer Calibration
Works with hydrometers also
Calibrate your Refractometer Accurately
20. HYDROMETER - ALCOHOL, 0 - 200 PROOF and Tralle
Proof and Tralle Hydrometer
Proof range 0 to 200%
Not accurate for lower alcohol products like beer or wine
21. Kimble 52140-0100 Salt and Brine Hydrometer, Graduated from 0-100% Saturated Sodium Chloride
Scale range 0-100% saturated sodium chloride
Graduated in intervals of 1% of saturation
Stem OD 7 mm; Body OD 16 mm; Length 300 mm
Sample volume 300 mL
Recommended for use with Kimble cylinder 20058-38375
22. ThermoPro TP157 Hygrometer Indoor Thermometer for Home, Room Thermometer Humidity Meter with Accurate Temperature Humidity Sensor for Greenhouse Baby Room Office-1 Pack
High Accuracy & Fast Refresh Rate: Temperature humidity gauge is equipped with a high-performance humidity temperature sensor with an accuracy of up to ±1℉/±2%-3%RH, and a refresh rate up to 10s, allowing you to adjust humidistat in time
Easy-to-Read LCD: Room thermometer indoor mini hygrometer features a clear display with compact digits which allows you to view readings from various angles even at a long distance
Face Icon Comfort Indicator: Room temperature monitor dispalys three face icons which represent DRY/COMFORT/WET to visually inform you of the current air conditions, quickly adjust your humidifier to better protect your health
Convenient Placement: Wall thermometer indoor is designed with tabletop stand, magnetic back and hanging hole, easily place the hydrometer digital anywhere specially small spaces such as humidor, incubator and refrigerator, etc.
Long Battery Life and Widely Usages: Home temperature humidity monitor comes with low power consumption display to extend the life of battery up to 18-24 months, which can be used in your house, baby room, closet, greenhouse, warehouse and etc.
23. BioRing Alcohol Hydrometer Kit 0-100% 3 Set Thermalmeter Accurate Meter for Whiskey Moonshine Distill with Test Jar (Plastic Box+Glass jar)
This professional hydrometer kit offers accurate measurement with 3 meters ranging from 0-40%, 40-70%, 70-100% coupled with a thermal meter for accurate reading at various temperatures.
It comes with a test jar and a wooden/plastic box for easy setup, storage, and carry-on. Suitable for testing distilling spirit moonshine, Whiskey Brandy or commercial liquor test. etc.
It works for Hobbists, personnel in chemical factories and, laboratories. Our service team 7/24 stand by, if you have any issue please let us know. we would like to address your issue ASAP.
24. Salinity Refractometer,Refractometer Salinometer,Aquarium Optics Refractometer Temperature ATC Digital 0-10%, for Saltwater Aquarium Marine Fishkeeping, Salinity Refractometer,Refractometer Sal
0 to 10% salinity, 0.01% scale. Hair Dryer Holder Pet Hair Dryer Holder
Adjust the focus by ing the handle.
Durable aluminum body, durable and can use for a long time.
Compact design with rubber handle.
Soft and flexible eyepiece for added comfort.
25. Pilipane Digital Salinity Tester for Salt Water, Waterproof IP67 Aquarium Salinity Meter with ATC, 0-200 PPT Multi-Parameter Tester for Seawater, Aquariums, Marine Monitoring
?¡¾Salinity Range¡¿0~9999ppm/10~200ppt or 0.0-25%, salinity tester has an automatic temperature compensation function(32¡ãF~140¡ãF), which can decrease the error caused by the change of liquid temperature.
?¡¾Easy Reading with LCD Backlight¡¿There is no need to worry about seeing the displayed value if the light is insufficient. Salinity meter features a green backlit LCD to help you see the measurement results clearly in any situation.
?¡¾Automatic Temperature Compensation¡¿Notice: We recommend waiting for a while to observe the measurement results for more accurate reading. Salinity tester is equipped with ATC part inside, during normal temperature, once calibrated, the temperature change would never affect the accurate of your measuring result.
?¡¾Multifunctional Salinity Tester¡¿The multi-parameter Tester can test Salinity, TDS, EC and Temperature in an accurate, quick and reliable manner for most regular water solutions' testing. Support One-tap switch from salinity to TDS/EC.
?¡¾Wide Applications¡¿There are various purposes for the salinity tester. This instrument can not only detect the salt content of edible salt, salt water pool and koi fish pond, but also the salinity of seawater, marine, salt water fish tank salt level testing.
26. Aquarium Salinity Tester, Firm Clear Reading Lightweight Hydrometer Salinity Meter for Salinity for Specific Gravity
By Gaeirt Store
[Plastic Material] Salt water salinity meter for fish tank is made of plastic material, which is strong and durable.
[Auto Detection] Aquarium glass saltwater hydrometer is lightweight and easy to use and automatically detects specific gravity of water samples.
[Accurate Reading] Aquarium hydrometer auto recognizes the level to get accurate reading both in the pond, in and out of the tank.
[Salinity Tester] Aquarium salinity tester tests salinity and specific gravity of fish tank, specific gravity range 1.000 to1.030, salinity range 0 to 40.
[Note] Crystallization of salt on the pointer will cause inaccurate readings If salt crystallizes in the hydrometer, soak the hydrometer in warm water or vinegar for 30 minutes, then rinse with water and dry.
27. Digital Refractometer Veterinary Dog and Cat Urine Dr503 Serum Protein Tester
Automatic Temperature Compensation
One key correction,and one second measuring
waterproof (IP65),Water cleaning
E.L.I light proof to make sure the accuracy when outside meauring.
Use pure water to come back to Zero,very easy
28. Salinity Meter, IP67 Waterproof Salt Tester, High Accuracy Salt Concentration Measuring for Hydroponics Aquarium Fish Pond Aquaculture, Salinity Meter, IP67 Waterproof Salt Tester, High salinity
Powered by 3pcs 1.5V LR44 160mAh battery(not included), easy battery replacement, simple operation, easy to use.
The salinity value can be accurately displayed. The salinity meter is small in size, light in weight, convenient to carry. S-200 IP67 Waterproof Salinity Meter Salinity Tester Food Sa
Made of high-quality plastic materials, corrosion-resistant, wear-resistant, and long service life. alinity Meter Food High Precision Salt Concentration Meter
With LED display, the measurement results can be clearly and visually displayed, you can read easily.
Suitable for the detection of salt content in freshwater aquaculture, freshwater aquarium, marine aquaculture, seawater aquarium, seawater, brine, soup, and liquid food.
29. ALREMO HUANGXING - Salinity Tester, Simple Portable Salinity Meter, Folding for Drinking Water Swimming Pool Food Processing Aquarium
Made of high quality ABS material, the salinity meter is not easy to be damaged and durable for long time use.
It can be folded when not in use and more convenient to carry after folding.
High accuracy, fast measurement response, stable performance and high reliability.
Folding salinity meter for water is convenient for multi angle measurement.
Suitable for aquaculture, drinking water, swimming pool, aquarium, food processing, laboratories, paper industry, etc.
30. Hallocool Salinity Refractometer for Aquarium Marine Seawater Refractometer and Digital Fish Tank Thermometer
EASURES ON 2 SCALES - Salinity Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100‰ (0~100PPT), allow you to get the result in two different units by one test
WIDELY USE - Salinity Refractometer designed for measuring salinity of water, salt water, ideal for Aquariums, Marine Monitoring, agriculture, fish-keeping, saltwater pools
EASY TO USE - Put 2-3 drops of sample solution after calibration on prism, towards light, then you get the accurate readings through the optics eyepiece, ideal for replacement difficult to read hydrometers or expensive digital salinity tester
Cordless & Touch Design - The stick-on fish tank thermometer measures water temperature by built-in high sensor probe, no wireless probe, provides a clean and safe environment for fish. Touch the screen icon to display the water temperature
Accurate Reading Display - Tank thermometer measures range is 32℉ ~ 140℉, every 5s refresh the detected water temperature of tank. Thick glass tank water temperature detected deviation ±1℉, resolution is ±0.1℉
31. Handheld Refractometer Pet Cat Dog Urine Specific Gravity Refractometer Pet Tool
SUITABLE FOR: This refractometer has triple-scale design which to measure the Specific Gravity of Cat’s and Dog’s Urine, and the concentration of Serum Protein or Plasma Protein.
CONVENIENCE TO USE: Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry around. We provide Manual in English, Russian. Use ambient light only which means battery or power source is not required
ACCURATE MEASUREMENT: Adjustable manual focusing, Accurate testing results guaranteed. Equipped with scale measurement which provides direct reading. With Built-in ATC (Automatic Temperature Compensation) from 10~30 degree Celsius.
HIGH QUALITY MATERIAL: This refractometer is made of premium material, durable in use, Soft Rubber eyepiece for comfortable viewing
PACKAGE INCLUDING: The package list has 1pcs refractometer, 1pcs plastic pipette, 1pcs mini screwdriver, 1pcs clean cloth, and instructions.
32. Handheld Pet Cat Dog Urine Specific Gravity Refractometer Pet Medical Tool with 10 to 30℃ Automatic Temperature Compensation
By Garosa Store
The measuring range of specific gravity of dog is 1.000~1.060SG (resolution: 0.001SG),specific gravity of cat is 1.000~1.060SG(resolution: 0.001SG),concentration of serum or plasma protein is 2~14g/dl (resolution: 0.2g/dl) and the ATC (automatic temperature compensation) range: -10~30C (50~86F).
Handheld pet cat dog urine specific gravity refractometer is used to measure the specific gravity of large animal's urine, especially the specific gravity of dog and cat's urine and the concentration of serum protein or plasma protein.
Triple-scale design to measure the Specific Gravity of Cat’s and Dog’s Urine, and the concentration of Serum Protein or Plasma Protein.Equipped with scale measurement which provides direct reading.
Refractometer equipped with Automatic Temperature Compensation (ATC), so that the refractometer is automatically adjusted to correct temperature discrepancies of environment temperature and the automatic temperature compensation is from 10~30 degree Celsius.
Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry around.
33. RZ126 Handheld Pet Cat Dog Urine Specific Gravity Refractometer, Pet Medical Tool Measuring Animal's Health Index of Urine Specific Gravity and Serum Protein
With Built-in ATC (Automatic Temperature Compensation) from 10~30 degree Celsius.
We provide Manual in English, Russian.
Equipped with scale measurement which provides direct reading
Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry around.
Triple-scale design to measure the Specific Gravity of Cat’s and Dog’s Urine, and the concentration of Serum Protein or Plasma Protein.
34. ALREMO HUANGXING - Lab Refractometers,0 10% Aquarium Refractometer with Storage Box,Double Scale Automatic Temperature Hydrometer for Aquarium&Seawater
Package included: a refractometer,a screw driver,a suction tube,a firm plastic case.
Automatic Temperature Compensation makes it even easier to get fast results. Help you solve problems more quickly.
Professional Refractometer with ATC, easy operation and save big: just need 2 3 drops of solution, you can get accurate readings.
Measuring range: 0 100% (salt content), 1.000 1.070 (specific gravity), minimum scale, 1%, 0.001.
This refracto meter can be used to measure the salinity levels of saltwater aquariums and the worlds oceans.
35. Hyuduo Handheld Pet Refractometer for Urine Specific Gravity of Cats and Dogs - Accurate Clinical Tool for Pet Medical Care
By Hyuduo Store
Suitable for use with both cats and dogs. Equipped with scale measurement which provides direct reading
We provide Manual in English, Russian. Accurately measure your cat or dog's urine specific gravity with this handheld pet refractometer
Essential clinical tool for pet medical care. Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry around.
Provides accurate and reliable results With Built-in ATC (Automatic Temperature Compensation) from 10~30 degree Celsius.
Triple-scale design to measure the Specific Gravity of Cat¡¯s and Dog¡¯s Urine, and the concentration of Serum Protein or Plasma Protein. Easy to use and portable
36. 0 to 100% Salinity Refractometer 0 to 100 PPT Hydrometer 1.000 to 1.070 Double Scale Portable ATC Salinity Meter for Aquarium
By Garosa Store
DURABLE MATERIALS: The brine refractometer is made of aluminum and ABS rubber, which is rust proof, non staining, wear resistant and durable.
DUAL SCALE: The seawater refractometer has a dual scale specific gravity,the measurement range is 0-100%,grid value is 1% and accuracy is ±1%,allowing you to obtain results in two different units with a single test.
ATC FUNCTION: Brine refractometer with automatic temperature compensation minimizes the effect of temperature on accuracy, allowing you to obtain accurate results.
BROAD USE: The salinity refractometer is designed to measure the salinity of water and brine and is ideal for aquariums, marine monitoring, agriculture, fish farming, and brackish pools.
EASY TO USE: After calibration, place 2-3 drops of sample solution on the prism, facing the light, and then you can get an accurate reading through the optical eyepiece.
