GuDoQi PH Meter, TDS Meter Combo, Pool Water Test Kit, PH Tester Digital, PPM Meter, 0.01 Resolution TDS PH EC Temperature 4 in 1 Set for Drinking Water, Hydroponics, RO System, Aquarium, Swimming
$10.99







Price: $10.99
(as of Nov 04, 2025 13:43:57 UTC – Details)
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WIDE USE:It is commonly used for testing the pH balance, quality and hardness of drinking water, household water, pool water, aquarium, Spa, hydroponics etc(Any issue about this product ,pls contact with us)
THE RANGE OF MEASURE: PH resolution is 0.01pH, accuracy is ±0.01pH, measurment range is 0-14 pH. TDS meter ranges from 0~9990ppm, Conductivity ranges from 0~9990 us/cm, EC ranges from 0~9990 us/cm
ATC FUNCTION: Equipped with auto temprature compensation function, PH tester can adjust according to water temperatures and give pH readings almost instantly. Don’t need to care about the temperature of test liquid
EASY TO USE: For water quality tester, pressing ”HOLD” button for maintaining reading, pressing ”SHIFT” button once for TDS & EC transformations, pressing ”SHIFT” button twice for “° C / ° F” transformations
AUTO CALIBRATION: For pH tester, just place the instrument in the standard buffer and press the CAL button then it will automatically start calibration data. (This ph meter has been calibrated by factory so users can use it directly)
Customers say
Customers find the water testing kit easy to use and appreciate its quality and convenience, with one mentioning it’s handy for on-the-go situations. The functionality and accuracy receive mixed reviews – while some say it works well and is quite accurate, others report the PH pin stops working and find the PH meter inaccurate. The value for money is also mixed, with some finding it okay for the price while others consider it a waste of money. The calibration accuracy receives negative feedback, with one customer noting issues with calibration above 7.44.
13 reviews for GuDoQi PH Meter, TDS Meter Combo, Pool Water Test Kit, PH Tester Digital, PPM Meter, 0.01 Resolution TDS PH EC Temperature 4 in 1 Set for Drinking Water, Hydroponics, RO System, Aquarium, Swimming
Add a review
$10.99
Robert Forte –
Inexpensive
Very inexpensive, but very reliable
SoloP –
Easy calibration
Works great . Just put the 9.14 buffer for calibration . It’s easy. Good price for the two to see how much fertilizer to put into my plants
The Office Guy –
Quite accurate, not sure how long these units will last.
Quite accurate, not sure how long these units will last.
LightForAll –
DOA.
I found a cool video on YouTube that gave great instructions regarding initial calibration, and I had high hopes to use the last of my distilled water to calibrate this Ph tester for gauging the acidity of some new wine fermentations.Alas the tester was DOA. No ability to power up proved by the inability of the spare batteries to make it work as well.
Amazon Customer –
Great product
Works great
Lenease –
Easy to use and accurate
I had been reluctant to get a ph tester for my hydroponic Gardyn because I knew it had to be calibrated. So, I had been using test strips. This device is nicely packaged, has a cute carrying case for the ph and ec meters and comes with extra batteries.It was incredibly easy to calibrate and use. Love it. Cute cases too.
AnnaLee Morrison –
Itâs okay for the price
I like the fact that it comes with the pH buffer solution so I can calibrate myself, not sure if I did something wrong but they stopped working super quick, not sure if it is 100% water resistant. It is early to read and adjust
Timothy Zepharia Rich –
Great product
Works as should and wasn’t expensive
toodaloo –
Good to have around when you to check water quality
Apricot –
Got these to test the Ph and EC levels of the nutrient solution in my hydroponics systems and they are currently doing great. The product is really handy to keep the Ph and EC levels steady in my nutrient solution and the multiple readings can be taken in a row which is really handy. The Ph tester even comes with different packages of Ph buffer solution so that’s really handy as well. My plants in my hydroponics system are doing great right now thanks to this product. Overall really like the product.
Ricardo Rincon –
Excelente producto, cumple perfectamente su función y la relación calidad-precio lo vale. Además llegó antes de tiempo. Estoy muy satisfecho con la compra y lo recomiendo.
Franz-Josef Schwickerath –
Gutes Gerät für kleinen Preis, einfach zu kalibrieren.Habe dieses jetzt für meine Schwester gekauft, besitze selbst eins seit 3 Jahren.
StanisÅaw –
Zakupione mierniki używam w domu do kontroli wody z kranu i tej przefiltrowanej zestawem filtrów odwróconej osmozy. Mierniki nie majÄ znaków firmowych, jednak sÄ bardzo dobrze wykonane a co najważniejsze precyzyjnie i powtarzalnie podajÄ wyniki pomiarów. Teraz wiem, jakÄ wodÄ piÅem do tej pory i jakÄ pijÄ po przefiltrowaniu. Polecam ten zestaw. StanisÅaw.