Best Aquarium Hydrometers. Reviews October, 2020

Full Range Hydrometer

Search only MarineLand brand name
Full Range Hydrometer

Current price: 12.44 USD

Saving: $1.21 (9%)


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Height: 8 Inches

Length: 15 Inches

Width: 6 Inches

Weight: 0.12 Pounds

Warranty: As Listed

  • No-wet-hands-design

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High Precision Salinity Meter,Salt Measuring Tester Device Acrylic Portable Special Aquaculture Aquarium High Precision Seawater Salinity Meter

Search only Xinwoer brand name
High Precision Salinity Meter,Salt Measuring Tester Device Acrylic Portable Special Aquaculture Aquarium High Precision Seawater Salinity Meter

Current price: 11.69 USD


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Weight: 0.1984160358 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.

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Fuloon Professional Automatic Temperature Compensation Sea Water - Salinity Refractometer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

Search only Fuloon brand name
Fuloon Professional Automatic Temperature Compensation Sea Water - Salinity Refractometer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

Current price: 19.99 USD


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Height: 8.1 Inches

Length: 3.4 Inches

Width: 2.2 Inches

Weight: 0.6 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)

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Marineland Aquarium CA1501 Hydrometer

Search only MarineLand brand name
Marineland Aquarium CA1501 Hydrometer

Current price: 32.89 USD


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Height: 15.51 Inches

Length: 1.18 Inches

Width: 0.71 Inches

Weight: 0.2 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501

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Taitan Seawater Hydrometer Salinometer Aquarium Seawater Tank Density Meter Experimental Instrument Laboratory Equipment Measuring Tool

Search only Taitan brand name
Taitan Seawater Hydrometer Salinometer Aquarium Seawater Tank Density Meter Experimental Instrument Laboratory Equipment Measuring Tool

Current price: 11.27 USD


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  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.

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JahyShow Professional Automatic Temperature Compensation Sea Water Salinity Refractometer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

Search only JahyShow brand name
JahyShow Professional Automatic Temperature Compensation Sea Water Salinity Refractometer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

Current price: 20.53 USD


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Height: 2 Inches

Length: 7.1 Inches

Width: 3.1 Inches

Weight: 0.56879263596 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.

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Water Quality Tester, Waterproof Electronic Water Quality Testing Meter Salinity PH TDS EC ORP Tester Hydrometer for Aquarium wimming Pool Drinking Water Beverage

Search only Worii brand name
Water Quality Tester, Waterproof Electronic Water Quality Testing Meter Salinity PH TDS EC ORP Tester Hydrometer for Aquarium wimming Pool Drinking Water Beverage

Current price: 69.79 USD


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Weight: 0.3747858454 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.
  • ✔ The waterproof and dustproof grade is IP67, supports short time immersion, convenient for seawater testing and water quality testing.
  • ✔ Suitable for domestic water, food salinity, fish tanks, aquarium, farmland, swimming pool, aquaculture, laboratory, etc.
  • ✔ With a high-accurate detachable probe, the measurement error is small, which can prevent accidental damage of the probe.
  • ✔ Support salinity, PH, TDS, EC, ORP measurement, stable performance, to help you conduct water quality testing.
  • ✔ With a mini display and no backlight, it can display the measurement results intuitively and clearly, convenient to use.

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Portable Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester

Search only YAZHI-MILA brand name
Portable Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester

Current price: 56.08 USD


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Weight: 1.10231131 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.
  • ✔ The waterproof and dustproof grade is IP67, supports short time immersion, convenient for seawater testing and water quality testing.
  • ✔ Suitable for domestic water, food salinity, fish tanks, aquarium, farmland, swimming pool, aquaculture, laboratory, etc.
  • ✔ With a high-accurate detachable probe, the measurement error is small, which can prevent accidental damage of the probe.
  • ✔ Support salinity, PH, TDS, EC, ORP measurement, stable performance, to help you conduct water quality testing.
  • ✔ With a mini display and no backlight, it can display the measurement results intuitively and clearly, convenient to use.
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.

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Digital Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester Precise

Search only brand name
Digital Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester Precise

Current price: 57.15 USD


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Weight: 1.10231131 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.
  • ✔ The waterproof and dustproof grade is IP67, supports short time immersion, convenient for seawater testing and water quality testing.
  • ✔ Suitable for domestic water, food salinity, fish tanks, aquarium, farmland, swimming pool, aquaculture, laboratory, etc.
  • ✔ With a high-accurate detachable probe, the measurement error is small, which can prevent accidental damage of the probe.
  • ✔ Support salinity, PH, TDS, EC, ORP measurement, stable performance, to help you conduct water quality testing.
  • ✔ With a mini display and no backlight, it can display the measurement results intuitively and clearly, convenient to use.
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.
  • The instrument can read accurate data

More Info

Handheld Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester,Accuracy measureing

Search only Shengjf-meter brand name
Handheld Digital Salinity PPM Meter for Salt Water Pool Food Salt Salty Brine Meter Hydrometer Aquarium Tester,Accuracy measureing

Current price: 57.83 USD


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Weight: 1.10231131 Pounds

  • No-wet-hands-design
  • Into the underwater 15 cm(6 inches) depth,to avoid the mistake of inhaling oil film on water surface.
  • The reading and accuracy can reach 0.002 gravitational unit,fish pond and water tank inside and outside can be read.
  • The professional design can make the fish pond temperature in 20-30℃ can get accurate reading.
  • It can automatically detect the specific gravity of water sample.
  • Simple and reliable reading,durable and long service life.
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Salinity meter designed to measure salt solution, the concentration of salty food, seawater and saltwater. Features with two scale line to directly read
  • Product structure: deviation prism + cover + calibration bolt + optical system pipeline +eyepiece (diopter adjustment ring)
  • Great For Lobster Tanks
  • Measures Gravity Of Liquids
  • Model #: CA1501
  • Picture is for reference only, not for sale, please prevail in kind!
  • Calibration is clear and the salinity and temperature can be clearly measured.
  • Placed in any corner of the aquarium, suspended in water, automatic test.
  • Simultaneous measurement of temperature.
  • Used to measure the specific gravity, density of seawater.
  • ✔ The waterproof and dustproof grade is IP67, supports short time immersion, convenient for seawater testing and water quality testing.
  • ✔ Suitable for domestic water, food salinity, fish tanks, aquarium, farmland, swimming pool, aquaculture, laboratory, etc.
  • ✔ With a high-accurate detachable probe, the measurement error is small, which can prevent accidental damage of the probe.
  • ✔ Support salinity, PH, TDS, EC, ORP measurement, stable performance, to help you conduct water quality testing.
  • ✔ With a mini display and no backlight, it can display the measurement results intuitively and clearly, convenient to use.
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.
  • The instrument can read accurate data
  • LED display, automatic temperature compensation and temperature display function, a little correction.
  • Widely used in chemical, pharmaceutical, electronics, food and other industries monitoring.
  • Its full-featured, stable performance, easy operation and so on.
  • The YD pen test salinometer is a precision meter for measuring the salinity of a solution. The salinity and temperature of the solution are also displayed.

More Info

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