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PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium

4.0 4.0 out of 5 stars 9,971 ratings

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pH Meter Yellow

Purchase options and add-ons

  • 【How to use calibration】Press CAL for 5 seconds to enter the calibration mode, press in turn to select the powders corresponding to 6.86, 4, and 9.18 to complete the calibration.
  • 【Mini Size】The mini size ph meter we designed allows you to easily put it in your pocket, so you can take measurements anytime, anywhere. It can help you test it whether you take it to the pool, on a trip, to the beach or camping.
  • 【Family Essentials】As a tool to improve the quality of life. Can be used to test drinking water, swimming pools, PH balance in aquarium, RO system, spa or hydroponics. Basically all the environments that need to test PH value can use this tester to get accurate data.
  • 【Easy to use】turn on the switch,put the probe into the water and stir (make the small glass ball fully contact the liquid) and the value can be read when the value is stable.
  • 【Automatic temperature compensation】There is no need to care about the temperature of the liquid being measured. The PH meter has an automatic temperature compensation function, which can be adjusted according to the water temperature and water quality.

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Product details

  • Package Dimensions ‏ : ‎ 6.87 x 2.13 x 1.26 inches; 3.53 ounces
  • Batteries ‏ : ‎ 1 CR2 batteries required.
  • Date First Available ‏ : ‎ September 7, 2020
  • Manufacturer ‏ : ‎ Ruolan
  • ASIN ‏ : ‎ B08HLXBBK4
  • Customer Reviews:
    4.0 4.0 out of 5 stars 9,971 ratings

Important information

Legal Disclaimer

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Product Description

PH tester usage related issues:

  • When the PH meter is turned on in the air, the value jumps irregularly, which is a normal phenomenon. The value in the air cannot be used as a reference.

  • When measuring the water with the PH meter, it needs to be stirred gently (to remove the bubbles attached to the probe), and it takes a period of stabilization. It is normal for the value to jump up or down during the test. Please do not just insert it and read it immediately.

  • White crystalline salt appears around the electrode of the PH meter, which is a normal phenomenon of the PH electrode, and the electrode can be removed by immersing it in water and cleaning.

  • The PH meter electrode is made of glass, which is fragile. Please do not drop it or touch it with your hands. Do not test the water above 50℃. Do not test the strong acid and alkali, which will cause the electrode glass to burst.

ph meter

Product name: 0.01ph automatic calibration ph pen

Test item: water ph value

Working environment: 0-80℃, RH<95%

Measuring range: 0.00-14.00ph

Automatic temperature compensation: 0-80℃

Calibration function: two-point automatic calibration

Application scope: water hydroponics, laboratory, pool,industrial water treatment, water purifier

ph meter for water
How to use:

  1. Take off the pen cover and clean the electrode with pure water
  2. Put the pen probe into the solution, taking care not to exceed the water level
  3. Turn on the switch, stir gently, and wait for the reading to stabilize
  4. After the reading is stable, read the displayed value
  5. After the test, clean the electrode with pure water, dry the water on the pen tip in time, and cover the pen cover back

Standard configuration:

  • 1XPH meter
  • 3X calibration powder
  • 1X gift box
  • 1X instruction manual
ph meter

Pay attention to the calibration sequence (6.86-4-9.18)

ph meter
Precautions:

Please note that the PH pen probe is a glass product and is a fragile product. Please do not collide with things. Once the damage is not replaceable, you must protect the probe. After use, use absorbent paper to gently absorb the water on the probe.

Instructions for use of PH calibration powder:

Calibration powder:pH standard solid substance. It can be used after adding water. Suitable for calibrating any type of ph meter. Each package needs to prepare 250ML of purified water.

(Note that the configured water must be purified water or distilled water. Tap water and mineral water cannot be used to configure the calibration solution.

The water must be added in the required proportion, otherwise it will affect the accuracy of the calibration and increase the error)

  • The configured calibrators shall be sealed with clean bottles and stored in a cool place away from light.
  • The shelf life of the calibration powder is 2 years, and the shelf life of the calibration solution after configuration is 6 months

Matters needing attention:

PH meter has been calibrated before delivery, the buyer does not need to re-calibrate after receiving the goods!

In the following cases, the PH meter must be re-calibrated:

  1. Has been used for a long time after calibration;
  2. Special electrode use Frequently;
  3. The measurement accuracy requirements are relatively high.

ph water

About the battery

If the backlight brightness drops significantly or the display value is blurred, the battery should be replaced.

When replacing the battery, just pull out the battery compartment and replace it. NoteThe polarity of the battery.

Looking for specific info?

Customer reviews

4 out of 5 stars
4 out of 5
9,971 global ratings

Customers say

Customers like the instructions on the lab supply. However, some customers have reported issues with the battery life and construction of the product. They mention that the batteries were dead on arrival and the construction easily breaks. Opinions are mixed on readability, quality, value, accuracy, and performance.

AI-generated from the text of customer reviews

268 customers mention225 positive43 negative

Customers find the instructions for the lab supply very easy to use, operate, and calibrate. They also say it's convenient and easy to read.

"The instructions are simple and setup was easy." Read more

"...Very easy to calibrate and to use. Easy to clean. I had purchased a three in one moisture/PH/light meter....bad move...." Read more

"Like it's handy case, easy to use, tape or film over bottons will for sure not last..." Read more

"...It’s super simple to use too." Read more

482 customers mention159 positive323 negative

Customers are mixed about the accuracy of the lab supply. Some mention it's perfectly accurate after calibrating, while others say that it'll only measure to. It's a reliable tester that can be calibrated and is easy to use. However, some customers say that the numbers on the packet are not accurate at all after calibration, are far from precise, and that it wouldn't calibrate correctly.

"tested compared to chemical tester, not accurate nor consistent" Read more

"great meter ," Read more

"...This time it wouldn't calibrate correctly. The 4 was 6.86, 7 was 9.18 and the 9 was either erroring out or showing high 11/12 readings...." Read more

"...to use (once calibrated, and calibration isn't hard), but the accuracy can be way off...." Read more

459 customers mention202 positive257 negative

Customers are mixed about the performance of the lab supply. Some mention that it works awesome, easy to use, and has different calibration packets. However, others say that it quit working after a few uses, giving different numbers and messing with the function.

"...I bought the first one and it worked the first few times then quit working. I returned it and got a replacement sent...." Read more

"This Ph tester does all it claim to do and does it well. And it is well worth the price.But......" Read more

"...I found on this is if you get any liquid above the probe it messes with the function, saying the PH of your sample is significantly more base than..." Read more

"Worked great" Read more

321 customers mention123 positive198 negative

Customers have mixed opinions about the quality of the pH meter. Some mention that it's worth having a reliable tester that can be calibrated, while others say that it is not lab quality and there's a 50 percent chance that you'll get a malfunctioning meter, making it useless for a couple days.

"...This time around I noticed a white chemical residue on it. Sure enough I was sent a used product that wouldNot even turn on...." Read more

"...But it will take care of you. It's a very good meter & I will buy it again. I use it everyday. And for accuracy...." Read more

"...I followed the instructions but the meter is still all over the place...." Read more

"...The 4 was 6.86, 7 was 9.18 and the 9 was either erroring out or showing high 11/12 readings...." Read more

204 customers mention134 positive70 negative

Customers are mixed about the value of the lab supply. Some mention it's easy to read, easy to use, and a good investment. Others say it'll just ain't worth it, is of cheap quality, and does not effectively tell you your ph.

"...And it is well worth the price.But......" Read more

"This is a very very very cheaply made meter that's VERY susceptible to damage. It's not water proof or even water resistant...." Read more

"Instant results I believe the technology. Incredible price point 💯....." Read more

"...This unit was a few bucks more and is very much worth it." Read more

69 customers mention22 positive47 negative

Customers are mixed about the readability of the lab supply. Some mention that it's easy to read, provides a quick read, and is extremely accurate. However, others say that the reading is erratic at best, fluctuating wildly, and impossible to tell if it''s reading correctly.

"...Even after calibrating it, the reading was fluctuating wildly in the calibration solution...." Read more

"...immediately the equipment after opening the package and the reading was way off but works perfectly after calibration, the process is just tedious..." Read more

"...So something is wrong.so... the readings are easy to see.... The device is easy to use (once calibrated, and calibration isn't hard),..." Read more

"...solution was correct, but after that solution it started reading incorrectly...." Read more

111 customers mention13 positive98 negative

Customers are dissatisfied with the construction of the pH meter. They mention that the filament broke easily, the end was broke on one of them, and the glass diode broke. The meter constantly breaks or just stops working, and it's very susceptible to damage. Customers also say that the meter feels flimsy and could be crushed in their hand.

"...It feels flimsy, almost like I could crush it in my hand. I also don't believe it would survive many falls...." Read more

"...These meters are very delicate, so be careful not to drop it or bang it. It will last a long time, as long as it’s taken care of properly." Read more

"This is a very very very cheaply made meter that's VERY susceptible to damage. It's not water proof or even water resistant...." Read more

"...because while cleaning it water can easily leak in and fry the unprotected electronics...." Read more

48 customers mention0 positive48 negative

Customers are dissatisfied with the battery life of the lab supply. They mention that the batteries are dead, the product has no working batteries, and the battery drains even when powered off.

"...that you must recalibrate under the following conditions: lengthy periods of inactivity (not defined), very frequent use (again not defined), the..." Read more

"Did not turn on when it arrived. I suspect the batteries are dead, but I’m not going to buy replacements since they’re more expensive than this..." Read more

"New batteries didn't help. Bummer. It worked well enough for the brief period that it was working." Read more

"Unit was shipped and batteries were already dead (zero voltage when I measured them). Had to replace with 2 new LR44 batteries...." Read more

Overall the tool is worth the bucks
4 Stars
Overall the tool is worth the bucks
I tried immediately the equipment after opening the package and the reading was way off but works perfectly after calibration, the process is just tedious with all the mixing and cleaning each pH level test. Once its ready and with the actual test result now I can do better action with our water supply. Just remember your chemistry lessons while preparing the device and I am wondering where can I get these sample sachets if next time if the tool needs recalibration, I don't want to keep these water mixtures around the house. Overall the tool is worth the buck.
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