The Best Digital PH Meter for Water (that Gives Accurate Results)

We all know all the benefits that come with drinking water whose PH level is higher than regular water, but how do you ensure your water PH level is at the recommended levels? This can only be done by testing water using a digital PH meter for water.

The 10 Best Digital PH Meter for water

 NameImageSpecificationAvailable at
1Koolamo Digital PH Meter Measure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy : ± 0.01 pH Automatic Temperature Compensation: 0°C - 50°C (32°F - 122°F), Automatic Calibration Button, Power Supply: Batteries: 2X 1.5V LR44 (included)Amazon
2Penta beauty PH MeterMeasure Range: 0.00 - 14.00 pH, Resolution: 0.1 pH, Accuracy : 0.01 pH, Automatic Temperature Compensation: 0°C - 80°C (32°F - 176°F), Automatic Calibration Button, Power Supply: Batteries: 2X 1.5V LR44 (included)Amazon
3Dr.meter Pocket Size pH Meter  Measure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH, Automatic Temperature Compensation, Three Points Automatic Calibration Button, Power Supply: Batteries: 4 LR44 batteries (included)Amazon
4KETOTEK Digital PH MeterMeasure Range: 0.00 - 16.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH, Automatic Temperature Compensation, Automatic Calibration Button, Power Supply: 2*1.5V (LR44 Button cell) (Included)Amazon
5WeekStar Digital Pocket Size PH MeterMeasure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH, Automatic Temperature Compensation-0°C - 80°C (32°F - 176°F), Automatic Calibration Button, Power Supply: Batteries: 2X 1. 5V LR44 (includedAmazon
6Poit Digital PH Meter Tester KitMeasure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: 0.05 pH, Automatic Temperature Compensation, Automatic Calibration Button, Power Supply: 2*1.5V (LR44 Button cell) (Included)Amazon
7Apera Instruments AI209 Value Series PH20 Waterproof pH Tester KitMeasure Range: 0.00 - 14.00 pH, Resolution: - pH, Accuracy: 0.1 pH, Automatic Temperature Compensation: 0°C - 50°C (32°F - 122°F)1-3 Points Automatic Calibration Button, Power Supply: Batteries: AAA (Up to 2000 hours' continuous operation)Amazon
Walmart

8Bluelab PENPH pH Pen Fully Waterproof Pocket Tester  Measure Range: 0.00 - 14.00 pH, Resolution: 0.1 pH, Accuracy: 0.1 pH, Automatic Temperature Compensation, Two Points Automatic Calibration Button, Power Supply: Batteries: AAAAmazon
Amazon

9LIUMY Water Quality Tester 2 in 1 Set, PH & TDS Water TesterMeasure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH, Automatic Temperature Compensation, Automatic Calibration Button, Power Supply: 2*1.5V (LR44 Button cell) (Included)Amazon
10Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 KitMeasure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH, Automatic Temperature Compensation-0°C - 60°C (32°F - 140°F), Automatic Calibration Button, Power Supply: 2*1.5V (LR44 Button cell) (Included)Amazon
Amazon

11VIVOSUN pH and TDS Meter ComboMeasure Range: 0.00 - 14.00 pH, Resolution: 0.01 pH, Accuracy: ± 0.05 pH, Automatic Temperature Compensation: 0 - 60 ℃ / 32 - 140 ℉, Three Points Automatic Calibration Button, Power Supply: 2 x 1.5V LR44 Button Battery (keep using more than 500 hours) Amazon

There are three methods of measuring water PH levels. This includes:

Of the above three methods, the only one that gives you an accurate result that is easy to understand is using a digital meter.

In this article, we are going to discuss the best digital PH meter for water.

What is a Digital PH Meter?

A digital PH meter is a device that measures the acidity or alkalinity of water. It is an electronic device that has a probe and displays the pH level on a digital display.

The pH scale ranges from 0 to 14. A pH level of 7 is considered neutral, while anything below 7 is acidic and anything above 7 is alkaline. The unit of measurement for the pH scale is called a “pH unit.” A lower number indicates greater acidity and a higher number indicates greater alkalinity.

How to use PH meters

  • Remove the protective cap.
  • Put the PH meter electrode in the water.
  • Press the button to be measured.
  • Stir the water gently.
  • The stabilized result will be displayed on the LCD screen in seconds.

Top Picks

  1. Koolamo Digital PH Meter 
  2. Penta beauty PH Meter
  3. Dr.meter Pocket Size pH Meter  
  4. KETOTEK Digital PH Meter
  5. WeekStar Digital Pocket Size PH Meter
  6. Poit Digital PH Meter Tester Kit
  7. Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit
  8. Bluelab PENPH pH Pen Fully Waterproof Pocket Tester  
  9. LIUMY Water Quality Tester 2 in 1 Set, PH & TDS Water Tester
  10. Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Kit
  11. VIVOSUN pH and TDS Meter Combo

11 Best PH meters reviews

  1. Koolamo Digital PH Meter 
Koolamo Digital PH Meter 

Available at:

PH meter Summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy: ± 0.01 pH
  • Automatic Temperature Compensation: 0°C–50°C (32°F–122°F)
  • Automatic Calibration Button 
  • Power Supply: Batteries: 2 x 1.5V LR44 (included)

The PH meter has a built-in auto temperature compensation feature that adjusts to water temperatures and water quality to give Ph readings almost instantly.

You can easily calibrate the device with the One-Touch Button using buffer powder. 

It is ideal for household or laboratory use. It is suitable for testing the Ph balance of drinking water, pool, aquarium, Ro system, spa, or hydroponics. It is also appropriate for a wide range of applications.

The package includes a 1-PH meter, a user manual, a carrying case, a 2x 1.5V LR44 battery, and 3x PH Buffer Powders.

Koolamo Digital PH Meter

Available at:

The Koolamo digital PH meter comes factory calibrated, but you are required to calibrate it after frequent use or a long period of inactivity.

For calibration, you are required to push the auto-calibration button. It comes with a 3-pack of calibration liquids.

It has built-in automatic temperature compensation (ATC) so that it can accurately determine the pH value of the sample at any temperature in a range of 0°C–80°C (32°F–176°F).

The device is pocket-size, therefore, allowing you to carry it around easily in your pocket and do your measuring anywhere.

It is ideal for testing water, pools, aquariums, spas, hydroponics, food, wine, and beer making.

The tester features an automatic shut-off after five minutes of inactivity.

The package includes a 1-PH meter, a user manual, a carrying case, a 2x 1.5V LR44 battery, and 3x PH Buffer Powders.

  1. Penta beauty PH Meter
 Penta beauty PH Meter

Available at:

summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.1 pH, Accuracy: 0.01 pH
  • Automatic Temperature Compensation: 0°C–80°C (32°F–176°F)
  • Automatic Calibration Button 
  • Power Supply: Batteries: 2 x 1.5V LR44 (included)

The Penta Beauty has an auto temperature compensation feature that adjusts to water temperatures and water quality to give pH readings almost instantly.

You can calibrate the meter with a one-touch button using calibration buffer powder.

It is ideal for use at home and in laboratories for testing the pH balance of drinking water, pools, aquariums, RO systems, spas, or hydroponics. 

The package includes a 1-PH meter, a user manual, a carrying case, a 2x 1.5V LR44 battery, and 3x PH Buffer Powders.

  1. Dr.meter Pocket Size pH Meter  
 Dr.meter Pocket Size pH Meter  

Available at:

Summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy : 0.01 pH
  • Automatic Temperature Compensation
  • Three Points Automatic Calibration Button 
  • Power Supply: Batteries: 4 LR44 batteries (included).

Dr.meter features a three-point automatic calibration method with just the touch of one button.

It also features an automatic temperature compensation function (ATC) that helps eliminate possible inaccuracies caused by the change in liquid temperature, making the pH more accurate.

The device is suitable for testing the pH of drinking water, swimming pools, aquariums, spas, hydroponics, food, wine, beer making, and more.

It uses four LR44 batteries, which are included.

More Dr.meter

Dr.meter Upgraded PH838 0.01

The difference between the above features is the automatic temperature compensation function (ATC) at a range of 0–70 degrees.

It has a large backlit display and alerts in a different color when the PH value is lower than 3.5 or higher than 12.5. The white digital display will change to red and flash to alert you.

This model uses 2 AAA batteries

  1. KETOTEK Digital PH Meter
KETOTEK Digital PH Meter

Available at:

summary

  • Measure Range: 0.00-16.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH
  • Automatic Temperature Compensation
  • Automatic Calibration Button
  • Power Supply: 2*1.5V (LR44 Button cell) (Included)

The KETOTEK Digital PH Meter can test the PH value of any 0–16PH liquid, such as drinking water, swimming pools, aquariums, hydroponics, wine, and beer.

It features AUTOMATIC TEMPERATURE COMPENSATION (ATC) with an operating temperature of 0°F–140°F and you can easily calibrate it by just pressing the button.

The PH meter uses a 2*1.5V (LR44 Button cell), which is included and features an automatic shut-off after 5 minutes of inactivity.

The package contains 1 PH meter, 2 PH buffer powders, and 1 user manual.

  1. WeekStar Digital Pocket Size PH Meter
WeekStar Digital Pocket Size PH Meter

Available at:

summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH
  • Automatic Temperature Compensation: 0°C to 80°C (32°F to 176°F)
  • Automatic Calibration Button
  • Power Supply: Batteries: 2X 1. 5V LR44 (included

It has built-in (ATC) automatic temperature compensation so that it can accurately determine the pH value of the sample at any temperature in a range of 0°C–80°C (32°F–176°F).

This meter comes with a handy storage case, a PH meter, a user manual, 2x 1. 5V LR44 batteries (built-in), and 3 buffer powders.

The best PH meter for testing pH in aquariums, water, pools, spas, hydroponics, food, wine, and beer making.

  1. Poit Digital PH Meter Tester Kit
Poit Digital PH Meter Tester Kit

Available at

summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy: 0.05 pH
  • Automatic Temperature Compensation
  • Automatic Calibration Button
  • Power Supply: 2*1.5V (LR44 Button cell) (Included)

This PH meter is factory calibrated and when you have a problem, you calibrate it to solve the problem.

It has an ATC function, and the package comes with a pH meter, carrying case, user manual, 2x 1.5V LR44 button cells (built-in), and 3x PH Buffer Powders.


Waterproof PH meter

  1. Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit
Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit

Available at

summary

  • Measure Range: 0.00–14.00 pH, Resolution: pH, Accuracy: 0.1 pH
  • Automatic Temperature Compensation: 0°C–50°C (32°F–122°F)
  • 1-3 Points Automatic Calibration Button 
  • Power Supply: Batteries: AAA (Up to 2000 hours of continuous operation)

The Apera PH tester provides reliable and quick PH measurements for water solutions such as hydroponics, horticulture, pools and spas, beverage making, education, aquarium and aquaculture, water treatment, and environmental monitoring.

It features easy automatic calibration with 1, 2, and 3 buffer recognition and automatic temperature recognition.

It has built-in automatic temperature compensation (ATC) so that it can accurately determine the pH value of the sample at any temperature in the range of 32 to 122F.

The tester uses an AAA battery, which lasts up to 2000 hours of operation. When the battery is low, you are notified by an alarm and it also features automatic power off if there is no operation for 8 minutes.

This tester provides PH and temperature measurements in (F or C).

When it comes to results in the display, the tester shows both PH and temperature results simultaneously on a large, clear LCD, along with a stable reading indicator and completed calibration icons. The smiley icon indicates stable readings, so you won’t have to guess when it is the right time to record the measurements.

Looking for a water-resistant PH tester? Look no further. An Apera tester is a good choice, so you don’t have to worry when the device falls into water that it will no longer work.

It has a regular glass probe type, and the product is CE and RoHS.

The package includes a calibration solution, 4 AAA batteries, a user manual, and a carrying case.

More Apera tester

Apera Instruments AI311

Apera Instruments AI311

Available at

The Apera Instruments AI311 measures PH, temperature, and ORP.

It recognizes five types of calibration solutions (1.68, 4.00, 7.00, 10.01, and 12.46).

The kit contains READY-TO-USE calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a rugged portable case.

The product features a high-quality, replaceable glass pH probe.

  • Apera Instruments AI3711 PH60-Z-Bluetooth Smart pH Tester Powered by ZenTest Mobile App with Cloud-Based Datalogger
  • Apera Instruments PC60-Z-Bluetooth Multi-Parameter Smart Tester Powered by ZenTest Mobile App, Measuring pH, conductivity, TDS, salinity, resistivity, and temperature.
  1. Bluelab PENPH pH Pen Fully Waterproof Pocket Tester (glass probe, fully waterproof, two-point calibration and calibration reminders)
Bluelab PENPH pH Pen

Available at:

summary

  • Measure Range: 0.00-14.00 pH, Resolution : 0.1 pH, Accuracy : 0.1 pH
  • Automatic Temperature Compensation
  • Two-Point Automatic Calibration Button 
  • Power Supply: AAA batteries

The Bluelab PENPH pH Pen features two-point calibration and auto temperature compensation.

It also features full waterproofing, an auto-off function (automatically turns off after 4 minutes), a low battery indicator, units for temperature backlit LCD, and calibration reminders. This meter is set up to tell you when it’s time to recalibrate.

The package includes an AAA battery, a lanyard, and calibration solutions (1 x 20ml sachet of pH7 solution, 1 x 20ml sachet of pH4 solution, and 1 x 20ml sachet of KCl storage solution).

This product measures PH at a range of 0–14 and temperature and gives temperature results in C & F.

The Bluelab PENPH pH Pen has a quality glass probe that is used to test water for the pool, drinking water, hydroponics, and brewing.

The glass probe tip must be kept moist.

How to store the Bluelab PENPH pH pen

Add 3-5 drops of KCl storage solution into the wetting seal inside the storage cap once a week. Never use RO, distilled, or de-ionized water. Place the seal and cap over the probe tip.

Long-term storage

 For long-term storage, remove the cap and place the pen upright in a plastic container. Cover the probe tip with a KCl storage solution to ensure constant hydration. Check the container regularly and top up the KCl storage solution as needed.

If the probe has been accidentally allowed to dry out,

The probe must be “hydrated” for 24 hours in a KCl storage solution (never use RO, distilled, or deionized water). Following this, carry out calibration to check if the probe has already suffered permanent damage.


PH and TDS Meter Combo

  1. LIUMY Water Quality Tester 2 in 1 Set, PH & TDS Water Tester

Available at:

summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy : 0.01 pH
  • Automatic Temperature Compensation
  • Automatic Calibration Button
  • Power Supply: 2*1.5V (LR44 Button cell) (Included)

TDS meter summary

  • The PH resolution is 0.01pH.
  • Accuracy ±0.01pH
  • TDS: 09990 ppm
  • Conductivity: 0~9990 us/cm
  • Accuracy: ±2%

The LIUMY tester is a 2-in-1 set. The meter and TDS meter can measure TDS, PH, electrical conductivity (EC), and liquid temperature in Fahrenheit or degrees Celsius. 

The TDS meter has automatic temperature compensation and a backlight function, while the PH meter has automatic temperature compensation but no backlight function.

This tester has an auto power-off to save battery life.

It can be used in a wide range of applications or be used to test wine, water, juice, aquariums, swimming pools, and spas.

The meter can measure PH at a range of 0.00 to 14.00 and displays the result on a large display screen.

In the pack are a PH meter, a TDS meter, 3-calibrated powders (6.68, 4.01, and 9.18), a built-in battery, and a TDS package.

  1. Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Kit
Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Kit

Available at:

summary

  • Measure Range: 0.00-14.00 pH, Resolution: 0.01 pH, Accuracy: 0.01 pH
  • Automatic Temperature Compensation: 0°C–60°C (32°F–140°F)
  • Automatic Calibration Button
  • Power Supply: 2*1.5V (LR44 Button cell) (Included)

TDS meter summary

  • PH resolution is 0.01pH.
  • Accuracy ±0.01pH
  • TDS:0~9990ppm
  • Conductivity: 0~9990us/cm
  • Accuracy: ±2%

The Pancellent test meter is a combo of a PH tester and a TDS/EC tester.

The PH pen has an AUTO CALIBRATION function, a lock, and an auto shut-off function.

It is ideal for home and laboratory for PH testing, including drinking water, electroplating liquid, boiler water, water in fish tanks, water in swimming pools, photograph flushing fluid, well water, deep phreatic water, aquaculture, food processing, and more.

The package includes a PH meter, a TDS meter, a user manual, and 6 calibrations.

  1. VIVOSUN pH and TDS Meter Combo
VIVOSUN pH and TDS Meter Combo

Available at

PH meter Summary

  • Measure Range: 0.00–14.00 pH, Resolution: 0.01 pH, Accuracy: ± 0.05 pH
  • Automatic Temperature Compensation: 0-60 °C / 32-140 °F
  • Three Points Automatic Calibration Button 
  • Power Supply: 2 x 1.5V LR44 Button Batteries (keep using more than 500 hours)

TDS meter summary

  • Conductivity: 0-9990 µs/cm
  • TDS: 0-9990 ppm (parts per million)
  • Degrees Celsius: 1.0–80.0°C Fahrenheit: 32.0–176.0°F
  • Accuracy: 2%
  • Net weight: 51g
  • Size: 154 x 30 x 14 mm

The VIVOSUN pH and TDS Meter Combo is great for home and laboratory testing applications, including swimming pools and aquariums.

The PH meter could measure PH and temperature values, while the TDS meter is a 3-in-1 that includes EC, TDS, and temperature functions.

It comes with a protective case that is lightweight and handheld, making it easy for portability and convenience.

It can be used in all water testing situations, such as water purification applications, aquaculture, hydroponics, pool & spa, colloidal silver, water treatment, and more.

This TDS meter has been calibrated by the manufacturer in advance using a 1413 solution that you can use for one year without a second calibration, so calibration liquid is not included.

The VIVOSUN pH and TDS meter displays results in four modes: TDS-ppm & °C, EC – µs/cm & °C, TDS-ppm & °F, EC – µs/cm & °F.

It uses a 2 x 1.5V LR44 Button Battery that lasts 500 hours and features a 9-minute auto shut-off so the battery won’t run down.

This meter measures 154 x 30 x 14 mm and weighs 15 g, which is pocket-size, making it easily portable.


More

Digital PH Meter, WECHIC

How should it be stored when not in use? Dry or in a solution?

  • Rinse the PH meter after every use with distilled water.
  • Dry it off using filter paper, a paper towel, or a clean, soft cloth.
  • Replace the protective cap to keep the electrode from drying out.
  • Store in case it comes with it.
  • You do not need to store it in a solution.

How do you know it’s time to replace the battery?

The PH meter requires the battery to operate. When the meter cannot be turned on or the LCD/screen fades, it is time to replace the battery.

How to calibrate the digital PH meter

  • Prepare 3 containers to add buffer solutions (pH 4.00 solution, pH 6.86 solution, and pH 9.18 solution).
  • Dissolve each calibration buffer solution in 250 ml of distilled water.
  • Turn on the pH meter.
  • Immerse the electrode in the pH 6.86 solution (at a temperature of 25 °C)
  • Press the “CAL” (calibration) button for 5 seconds and release.
  • The display screen will start flashing “6.86”
  • Wait for it until the display screen stops flashing.
  • Rinse the electrode with distilled water and make it dry with filter paper.
  • Repeat the above steps with 4.01 pH buffer powder and 9.18 pH buffer powder.
  • The digital device is ready for use.

Bonus video DIGITAL PH METER CALIBRATION

How to measure the PH value using a PH meter

  • Remove the protective cap from the pH meter.
  • Put the electrode into distilled water.
  • Slowly stir it for 5-10 seconds, then take out the pH meter and dry it.
  • Press the ON/OFF button to turn on the unit. 
  • Dip the electrode in the water you want to test, making sure the whole electrode is submerged.
  • Stir gently and wait for the value to stabilize. 
  • The LCD screen will display both the temperature and the PH.

How often should you calibrate the PH meter?

For the first user, if your meter has been calibrated by the manufacturer in advance, you do not need to calibrate it, but if not, you need to calibrate it before use. Use the steps above.

Calibrate once per week if you often test solutions of PH 10, or once per half month for neutral solutions.

Note

  • Rinse the electrode with pure water before the next test. 
  • Rinse and rest for 3-5 min before conversing from strong acid to strong alkaline and vice versa.
  • Don’t exceed the immersion line when testing.
  • Please Ensure There Is No Water In The PH & TDS Meters After Use, Otherwise They Will Rust. Use filter paper or a clean soft cloth to gently wipe it before capping.

How to Choose a Digital PH Meter

Before buying a PH meter, you should consider the following factors:

  • Accuracy – Accurate measurements are important for this
  • Easy to use
  • Battery life
  • Added features: Some come with an alarm system that alerts you when the water is at a certain level of acidity or alkalinity.

Accessories needed

Are digital PH meters accurate?

There are various methods to test water PH, and the most accurate and easiest method is to use a digital PH meter.

Can a soil pH meter be used for water?

No!

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