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Top 10 Best pH Meters For Hydroponic Of 2021

The Best pH Meters Review In 2021 : Our Top 10 Picks

Each model has its own sets of advantages and disadvantages. Some of them come in a combo, such as the Bluelab METCOM. Buying this model means you can receive more than a meter.

Bluelab and Apera contribute the most models in the list. These brands are also famous for their high-quality products. Choosing their meters is a safe option.

If price is your top concern, the VIVOSUN might be ideal for you. Despite the reasonable cost, it still performs well.

1. Apera Instruments SX620 - Best For Convenience

Feature Highlights

  • Smallest pH meter with reliable performance
  • Thin replaceable probe
  • Switching from ˚F to ˚C
  • Three types of calibration solutions included 

The Aprea Instruments SX620 is a tiny pen-style PH meter with a button press for activation. You can take this pocket-sized tester with you everywhere you go. A measurement range of 0 to 15.0 PH offers consistent and precise measurement at 0.1 pH. 

Additionally, the auto temperature adaptation ensures consistent temperatures ranging from 0 to 60˚C. The changeable 8mm pH sensor is ideal for the test-tube scale. It may recover a low battery indication from an alert and prompt you to change it using probe invalidation. It comes with everything you need, like a battery and a case.

The Aprea Instruments SX620 meter is also waterproof and dustproof. It also floats on the liquid. You can utilize the meter for various applications, including hydroponics, water treatment, aquaculture, pools, spas, and so on. 

The tool earns certification from RoHS and CE. It also features a straightforward single-point assessment that takes less than one minute to perform on time and under budget.


  • Compact and changeable probe
  • Storage case and solution available
  • Waterproof and dustproof
  • Float in water


  • Small display
  • More time on measuring pH levels

2. Bluelab PENPH pH Pen - Best For Gardening

Feature Highlights

  • Two-point calibration
  • Automatic temperature compensation (ATC)
  • Double junction probe
  • Battery indicators

The Bluelab PENPH meter provides an exact measurement of alkaline and acid solutions, allowing you to take preventive action.

This pH meter features a two-point calibration and adjusts the water temperature mechanically. Its illuminated LCD and calibration alerts make it perfect for use in the garden. 

A double connection probe is available in this handy tool to improve the precision of the measurement. A sponge is available in the Bluelab PENPH kit to keep the probe always moist.

It is the most desired product among gardeners due to its low power indication, auto-off feature, and temperature measurements.

However, the fragile sensor lights may be inconvenient, especially when your garden is in its sensitive stage.

Besides, the lack of a calibration kit creates some difficulties in measuring.


  • Temperature and pH result in one reading
  • Entirely waterproof
  • Sponge available for maintaining the probe’s moisture 
  • One-year warranty


  • No calibration kit supplied
  • Weak sensor lights

3. Bluelab METCOM Combo - Best All-In-One Package

Feature Highlights

  • Calibration reminders
  • LCD screen
  • Ability to serve different purposes
  • Two-point calibration

Bluelab METCOM Combo meter appears to be the ultimate kit since it includes pH, CF, EC, and temperature in one box. The ATC system and a two-point calibration are available in this digital tool.

Providing you with accurate evaluation helps in keeping track of your garden’s nutritional supplies. The illuminated LCD panel and eye-catching calibration alerts are too outstanding to skip.

This proper meter even has an auto-off mode, temperature measurements, and a low battery warning. Moreover, this option is budget-friendly that everyone can afford.

The probe is also a common reason for purchasing the product. METCOM features the double-junction probe.

However, the probe of Bluelab METCOM is also the one that may annoy users. Some people find it fragile. But don’t worry! Since this part is changeable, you can replace it with a new one at any time.


  • All-in-one kit
  • Auto-off feature
  • Changeable double-junction probe
  • Automatic measurement


  • Sensitive probe
  • Not entirely waterproof

4. Apera Instruments AI311 - Best For Overall

Feature Highlights

  • Sensitive maintenance
  • Replaceable glass probe
  • Solutions and storage available
  • Smiley icon for the stable measurements

Apera Instruments AI311 offers a variety of variants, but this line is their top model. It includes a complete package with calibration methods, a high-quality glass probe, battery and storage choices.

For hydroponic farming, the AI311 test kit is ideal. It has an ATC motor and a simple 1 to 3-point automated calibration to ensure accuracy.

After eight minutes of inactivity, the meter turns off automatically. This feature aids in saving the tool’s energy. 

The tool offers 3-color indicators for each operation mode. This feature enhances its simplicity and convenience.

Compared to other tools, the AI311 may be more pricey. The most expensive part of the kit is the probe.

Also, some gardeners fail at maintaining the kit. If you decide to buy one, make sure you can provide a freezing condition to store it.


  • Simple calibration
  • 3-color light for each mode of function
  • Entirely waterproof
  • Automatic function


  • Freezing maintenance
  • Pricey probe

5. Dr.meter Digital pH Tester - Best For Temperature Compensation

Feature Highlights

  • Automatic calibration
  • Automatic compensation for the temperature
  • Clear display with alerts
  • Simple functionality
  • Broad temperature range

Dr. Meter’s meter is incredibly accurate and includes automated calibration for simplicity in use. Dr. meter’s pH tester has several items that help a precise reading process. 

With the automatic calibration, Dr. Meter digital pH meter also provides mobile temperature adjustment, which removes any inaccuracies and results in spot-on results.

Because the Dr.meter pH tester is small, you can simply carry it along with you. You can also use the tool to check the pH of drinkable water, swimming pools, and a variety of other drinks.

Temperature can change reading numbers, but this PH meter’s automatic temperature correction can help you obtain the most accurate reading available.

This device has a wider temperature range than a regular pH meter, ranging from 0 to 70 degrees. The wider range allows you to test in any situation with assurance.

Before bringing the tool anywhere, make sure you have charged the battery fully. If there is any problem, you will struggle with the battery installation. 

Moreover, be careful with the probe. Once this part breaks, you cannot replace it with another one. 


  • Automatic measurement
  • Compact and lightweight
  • Diverse application


  • Difficult battery installation
  • Irreplaceable probe 

6. PmoYoKo Digital pH Meter - Best For Locking Function

Feature Highlights

  • Three-point calibration
  • Lock function, making it simple to record the result
  • Backlit screen
  • Sensitive buttons

The PmoYoKo digital pH meter features a three-in-one program that allows it to measure pH, temperature, and TDS all at once accurately. 

The digital pH tester’s high-accuracy algorithm processor and the electrode can guarantee fast and accurate results. The backlit LCD design ensures that the measurement results appear to be clear in any light. 

The lock function is an interesting feature of the PmoYoKo digital pH meter  meter. Even though the meter falls out of the samples, the one-button lock monitoring feature aids lock reading!

PmoYoKo products can work well with different samples. Moreover, the compact size assists you in using it anywhere.

You don’t have to worry about the temperature while testing the liquid. In its temperature range, the meter can correctly measure the pH value. The meter can also overcome the inaccuracy problem created by altering the temperature with the availability of ATC.

On the other hand, a few users complained about the bouncing result. To fix this problem, you need to have the meter tested weekly.


  • Three-in-one operation
  • Lock reading
  • ATC included


  • Bouncing results sometimes  

7. Bluelab MONGUA Guardian Monitor - Best For User Support

Feature Highlights

  • Mountable tool
  • Optimal monitoring
  • LCD display with calibration reminders
  • Two-point calibration

The Bluelab MONGUA is a wall-mountable meter that can perform more tasks than simply testing pH. You can employ the tester to measure temperature, EC, CF, and TDS. Hydroponics, brewing, drinking water, and pools are just a few of the various uses for the tool.

For reliability and convenience, the digital meter has two-point calibration equipped with automatic temperature adjustment. It can also monitor pH levels and nutrients all the time to assist plants in growing.

The Bluelab MONGU meter has a wide LCD screen that is simple to read. The display features are lighted to make things easy to read under any light.

Each pack contains a calibration solution. To protect your data, the manufacturer additionally offers a two-year limited guarantee.

With all the outstanding benefits, this option is ideal for every gardener. The only concern is the price. Compared to other pH meters, Bluelab MONGUA may be more costly.


  • Multi-task
  • LCD display
  • 24/7 monitoring
  • Calibration solution included
  • Two-year warranty


  • May be pricey

8. VIVOSUN 4-in-1 Digital pH Meter - Best For Budget

Feature Highlights

  • High accuracy with a sensitive probe
  • Best for hydroponics
  • Diverse application
  • Automatic temperature compensation 

VIVOSUN price is one of the most reasonable options for a pH meter. The tester is lightweight and compact, making it easy to carry everywhere. Despite the size and price, this tool also gives accurate results.

You can use this meter to measure pH, temperature, EC, and TDS. It’s a hydroponics meter that you may appreciate. With the flexibility to measure temperature and pH at once, you can be sure about the accuracy.

VIVOSUN products provide a large screen. It has four display options for the ultimate readings. The “Shift” button can help you switch from one mode to another.

One interesting thing about the VIVOSUN meter is that it can soften hard water. The water needs to pass the filtration process provided by the tool.

However, the threat appears to be a minus for the tool. This component is only available on the inlet side of the device.


  • Easy to use
  • Durability in terms of material and design
  • Ability to soften hard water
  • Water filtration is available


  • Threats only included in the inlet

9. Apera AI209-T Value pH Test Kit - Best For Long-Lasting Battery

Feature Highlights

  • Availability in combo for a complete calibration
  • Low impedance and excellent response speed
  • Set of solutions
  • Clear LCD screen

The Apera AI209 is another fantastic pH meter from Apera technologies. It’s compact, durable, and works well. There’s no denying that the brand is forward-thinking, offering high-quality hydroponic testers you can trust.

One of the distinguishing features of the Apera AI209 meter is its long-lasting batteries. With a battery lifespan of 2000 hours, you’ll be able to use the tester for weeks before having to recharge it.

This pH sensor’s accuracy is another characteristic you’ll appreciate. The gadget is entirely automatic. It can determine when the best moment is to check and measure.

The Apera AI209 comes with a set of solutions. You can try the set over many times to maximize the probe’s life.

The meter can also notify you if the internal calibration stops working, do the necessary testing, and fix the errors using its ATC function.

Testing with the AI209 requires you to dislodge it sometimes. There are some situations where the bubbles approach the probe. Dislodging the tool can help you solve the problem.


  • Automatic operation
  • Long-lasting battery
  • Portable
  • Self-diagnosis feature


  • Bubble invasion 

10. Oakton EcoTestr Pocket pH Meter - Best For Simplicity

Via: Amazon.com

Feature Highlights

  • Ultimate display with various viewing angle
  • Indicators for battery and calibration
  • Sample cup equipped
  • One-touch calibration

Oakton EcoTestr pH meter is compact enough to carry in your pocket. Its simplicity in use is also a big plus.

The meter has a large electronic screen that makes readings straightforward. The viewing angle has increased to read the meter from various angles without having to adjust or move.

There are also indicators for battery level and calibration. These figures help the users to keep track with the status of their tools as well as their crop. 

The cap in an Oakton EcoTestr pH meter has a fill mark to guide users in adding the proper quantity of solution for making a pH reading. Thanks to recent product advancements, the leakproof feature helps the mark remain tied to the meter while not in use. 

The cap’s bottom is wide and flat, which is suitable for the sample cup. The meter can stay upright, so you don’t need to hold it with your hand.


  • Large display with multiple reading angles
  • Instructions available for the solutions
  • Simplicity in use


  • Lower accuracy compared to other options

Buying Guide For The Best pH Meter

Let’s have a look at the features you should consider before deciding which sort of pH meter is right for you.

1. Accuracy

The purpose of possessing a pH meter is to learn how to adjust your soil and water so that your plants may flourish. As a result, accuracy should be your priority.

You should invest a little extra for a lab-quality pH tester if you want the best accuracy. The sensitive sensors on these devices can identify minute effects on soil pH.

pH testing using a dye or a strip is also quite reliable. Some people, however, have trouble distinguishing between the colors on a color range to estimate the pH level.

You must follow the procedure exactly as written in the manual. Pay attention to the dye-to-soil ratio that might affect the outcome.

2. Screen readability

Any meter’s screen and scale digits must be large enough to read clearly. An upward-facing screen is beneficial since you don’t need to bend to observe the meter.

The scale should include different color zones for pH, moisture, and light for multi-purpose measuring meters.

3. Probe length

Always examine the pH at the root, which might range from two to twelve inches.

A meter with a lengthy probe can evaluate a broader range of plants and is appropriate for outdoor and indoor plants. Short probes can test the pH of the soil with shallow-rooted crops or for routine soil pH measurement.

4. Durability

Probes are usually the first component of a pH meter to break. Check to see if it has sturdy steel and waterproof probes that won’t crack easily. If such a thing happens, the meter may give a misleading reading.

Consider the meter’s maintenance issues too. A wipe or a specific cleaner should be enough to keep the fragile probe tips spotless on most devices. Sophisticated pH meters may necessitate cleaning agents or even adjustment occasionally.


How accurate are pH meters?

The pH accuracy of the available meters ranges from ±0.1 to ±0.001 pH. A pH tester with a precision of ±0.01 is an excellent option for quality assurance. A pH meter with an accuracy of ±0.10, on the other hand, will be more inexpensive and suitable for lab work.

How to tell if my pH meter is still working?

Testing a pH meter in a standard sample solution is the only reasonable approach to verify whether the tool is correct or not. 

What can you do to make sure the pH meter is reliable?

You can calibrate the meter to detect the number of hydrogen ions in its solution accurately. The handbook that comes with the pH meter describes the procedures for correctly calibrating.

What may go wrong with a pH meter's measurements?

One of the causes why the pH meter gives inaccurate data is due to the poor calibration. When the electrode of the pH meter breaks down, the meter might provide erroneous readings.

Are inexpensive pH meters reliable?

In comparison to pricey pH meters, economic pH meters may be somewhat off-target. On the other hand, some companies keep their prices modest while providing outstanding performance in all areas, especially pH meter correctness.


Above is the list of top pH meters. Each of the models gives you different advantages. It must be your preference and requirement to decide which is the best. 

If the user knows the scope of applications for pH meters, they may be very beneficial. A good pH meter is also helpful in achieving the best results. For your best crop, investing time and effort in looking for a pH meter is worth it.

Hopefully, you will find this article helpful. If you need any further information about the best pH meter, please feel free to ask. 

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