ph20 ph meter/tester for tap water/drinking water testing, agriculture, aquaculture and swimming pool

PH20 Value Pocket pH Tester Kit

±0.1 pH, Auto Calibration (1-3 points with auto buffer recognition), Auto Temp. Compensation (0 to 50˚C), pH

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Simply the most reliable pocket pH meter/tester with the best value for all kinds of routine testing, such as tap water/drinking water testing, agriculture, aquaculture, swimming pool, education, etc.

  • The PH20 Value Pocket pH Meter/Tester has an ultra clear 180˚ viewing angle screen with temperature/pH value dual display and indications of completed auto calibrations and stable readings.
  • The PH20 Value Pocket pH Meter/Tester Kit is a complete pH tester kit with calibration solutions (4.00 and 7.00), AAA batteries, and a lanyard all in a rugged carrying case.
  • The PH20 Value Pocket pH Meter/Tester has 1-3 points auto calibration and 0 to 50˚C auto temperature compensation, ±0.1 accuracy with 0 to 14.0 pH measurement range
  • The PH20 Value Pocket pH Meter/Tester can do self-diagnosis with out-of -range warning and incorrect calibration warning.
  • The PH20 Value Pocket pH Meter/Tester is IP67 Water-proof and dust-proof, can float on water so no need to worry if you drop it in the water by accident.
  • The PH20 Value Pocket pH Meter/Tester has longest 400 hours' continuous operation powered by AAA batteries (with low power warning and auto power off in 8 min if no operation).

Meter’s Technical Specs



0 to 14.0 pH


0.1 pH


±0.1 pH

Calibration Points

Automatic 1 to 3 points

Temperature Compensation

Auto Temperature Compensation

0 to 50 ˚C (32 to 122˚F)



0 to 50˚C (32 to 122˚F)






180˚ Viewing Angle LCD

Stable Reading Indication

Smiley Face icon

Low-Battery Warning

Battery icon flashing, reminder of battery replacement



Heads-Up Function


Auto. Power-Off

Yes, auto power-off in 8 minutes without operation

Waterproof Rating

IP67; Floatable


DC3V, AAA batteries*4

Battery Life

Continuous operation up to 2000 hours

Dimensions& Weight

Tester: (40*31*178) mm/ 107g With case:(190*165*40) mm/ 438g

Electrode’s Technical Specs


Regular water solution testing, such as pools and spas, hydroponics, tap water, drinking water, water treatment, aquaculture, cooling towers, etc.

Shape of glass membrane




Temperature sensor



Single Junction Ceramic

Reference Eelctrode





0 to 14 pH

Temperature Range

0 to 50˚C (32 to 122˚F)

PH20 Manual (PH20_manual-v3.4.pdf, 868 Kb) [Download]

This was my first pH meter and I had a few questions before ordering. Chandler at Apera got back to me moments later with the answers. After a couple of more exchanges I was impressed with the level of Customer Service from Apera, so I decided to give the PH20 a try. Well, upon receiving the meter I was also impressed with the fact that this meter was already calibrated, right out of the box! I still went through the calibration process to "lock" in the "Low\4" and "Medium\7" calibrations- solutions provided. This process was easy (must do calibrations in the right order) and the meter was right on the mark. Over the last couple of weeks I have been testing this meter to see if there was any drift, and I can honestly say that there hasn't been any. I used this meter to close my pool this year and I'm more confident this winter my levels are correct. I feel this meter was the right decision for me- coming from having no meter and considering the numerous junky ones out there with padded favorable reviews, this meter will serve me well with accurate readings for hopefully the next couple of years or so. At that point, I would definitely feel confident in sticking with Apera- they have some really nice pieces in their catalog.
Arrived at 2PM in the afternoon. I calibrated, tested my pool water and my 9.5 Ph drinking water and writing this review at 2:30 pm.
It was precise and easy to use. IT gave me a lot of confidence in the Ph readings I have been trying to validate.
This pH meter is made by Apera Instruments which is known for high end pH meters that are used in research laboratories. This instrument is value priced, but has electronics that are competitive with higher end pH meters. I checked the accuracy of this instrument using a series of standards and found that it is indeed accurate to 0.1 pH unit when measurements are made with 2 pH units of one of the calibration standards. I further verified that temperature compensation is accurate. There are many inexpensive pH meters for sale on Amazon which claim temperature compensation, but actually have none. This meter is nearly perfect for checking the pH of a pool prior to adding chemicals to control the pH. Two-point calibration is adequate for this application, but this meter will do 3-point calibration for those who feel they need it. (One needs a pH=10 standard to do that. Only pH=4 and pH=7 solutions are included in this bundle.) This meter also reports the temperature, which is very nice.

Apera provides a useful video showing the two-point calibration process [...]
This is a good, solid instrument. I took off one star for lacking a backlight which for me is a critical component of any pH meter, and a feature that should have been included for the price. That said, I would recommend that anyone who plans to use a pH meter in a non-hobby application where accuracy is important to step up to the Apera PH60 instrument which is far more accurate (+/- 0.01 pH unit), includes a backlight, and is only about $30 more.
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