Digital Pool Water PH Tester – Multifunctional 4 in 1 PH Meter for Water/TDS/EC/Thermometer, TDS EC Meter Digital Water Tester with LCD Display for Drinking Water Swimming Pools Aquariums Hydroponics
Original price was: $19.19.$15.99Current price is: $15.99.
Price: $19.19 - $15.99
(as of Nov 09, 2025 04:03:02 UTC – Details)
Product description
1 Product Dispaly
2 Product Parameter
3 Reference Value for Plant
4 Used Situation
5 Product Parameter
Product Dimensions : 0.78 x 1.57 x 7.22 inches; 6 ounces
Item model number : MF-M41
Date First Available : August 2, 2025
Manufacturer : NUAOI
ASIN : B0FGFGJ9HK
Best Sellers Rank: #414,355 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #387 in Swimming Pool Water Test Kits
Customer Reviews: 3.7 3.7 out of 5 stars 13 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
4 in 1 Digital Pool Water Tester – Worried about your pool water? We’ve got you covered. Our water ph tester can measure pH, EC, TDS and temperature; Simply press the (MODE/CAL) button to switch between pH, EC (μS/cm), TDS (ppm) and read the values. Corresponding pH measurement range: 0.00-14.00 pH; Measuring range EC 0-9990µS/cm; TDS range: 0-9990ppm. Press and hold the HOLD/TEMP button to switch between °F and °C, easily monitor your water quality every day, so you always know what’s going on
Wide Application TDS Water Meter – The ph meter for water is your go-to solution for keeping water quality in check across a wide range of settings. Perfect for swimming pools, hot tubs, spas, aquariums, hydroponics, and even drinking water—this all-in-one digital water tester helps you monitor pH, EC, TDS and temperature with ease. Whether you’re a pool owner, aquarium hobbyist, or into hydroponic gardening, this water quality tester makes routine water testing simple, accurate, and reliable
Fast & Accurate Water Pool Tester You Can Trust – Equipped with a high-quality titanium alloy probe, the NUAOI digital ph EC meter delivers fast, reliable results for measuring water purity. Paired with an upgraded pH sensor featuring a precision chip, it ensures stable readings without annoying jumps or fluctuations. So this pH/TDS meter can help you find out quality water value. Whether you’re testing drinking water, a pool, or your hydroponics setup, you’ll get accurate results every time
Unique Design – The PH pool tester features a green backlit LCD screen for easy reading in any lighting condition, plus a one-button hold function to lock in results—even after removing it from the water. Built with automatic temperature compensation (ATC), it delivers precise pH readings across a wide range of temperatures (32°F–140°F), so you never have to worry about fluctuating liquid temps. Durable and reliable, it’s a smart, long-term investment for consistent water quality testing
PH Pool Water Testing Kit is Easy to Calibrate – Our pH meter pool PH test kit is very easy to calibrate during you use, every customer could complete the calibration according to the user manual. We also offered 3 bags of buffer solution powder(1*PH 4.0/1*PH 6.86/1*PH 9.18) in the product package. For any operation issues, restore the factory settings. Additionally, for precise pH measurement, use the included pH calibration powder to recalibrate after restoring the factory settings
How to calibrate the pH Meter/TDS Meter? – Step 1: Add pH4.00/pH6.86/pH9.18 buffer powder into water and stir it; Step 2: Press the ON/OFF button and adjust to pH mode. Put the electrode into pH4.00/pH6.86/pH9.18 standard solution and wait 5~10 seconds; Step 3: Press and hold the MODE/CAL button and release after 6 seconds; wait pH4.00/pH6.86/pH9.18 flash 3 times till readings are no longer flashing, finish the pH calibration
8 reviews for Digital Pool Water PH Tester – Multifunctional 4 in 1 PH Meter for Water/TDS/EC/Thermometer, TDS EC Meter Digital Water Tester with LCD Display for Drinking Water Swimming Pools Aquariums Hydroponics
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Original price was: $19.19.$15.99Current price is: $15.99.
Luis Crespo –
Ph y tds
Funciona bien el tds
pw- –
Good Tool for Pool Maintenance, Some Limitations
I have been using this 4-in-1 digital pool water tester and it has been a big help. It measures pH, EC, TDS, and temperature in one unit, which makes pool maintenance much easier than using separate test kits.The display is clear and easy to read, and operation is straightforward. I appreciate not having to deal with multiple strips or color charts. Calibration took a bit of patience, and I am still checking how accurate it is compared to my traditional chemical test kit. The overall build quality is fine, but it feels a little light for something used around water and outdoor conditions.If you want a quick way to get consistent readings without a lot of hassle, this tester is a good option. Just make sure to calibrate it carefully and confirm results occasionally with another method.
Craig J –
Display is hard to read in sunlight
It works; however, in sun light, you canât read the display. It loses calibration after a couple of weeks.
Chris & Cassidy –
Works as described
This is just what I needed to check the ph of my fish tank.
Shane H. –
Works well. You will have to buy tds calibration fluid. It only comes with ph.
This multifunctional meter works well and is accurate. It seems well made and should last for some time.Once calibrated itâs easy to use.Calibration requires several steps. The included ph calibration packets require you to use distilled water.The reason I wanted this was to test my aquariums Total dissolved solids and I was surprised that it didnât include any calibration packets for that. I had to spend about 12 dollars getting some from amazon. It worked well and now itâs calibrated.Once calibrated it stays accurate for weeks and youâll rarely have to recalibrate unless you notice things donât seem right.Itâs a good quality meter that I use daily with my three aquariums and I use it to text my water filter to make sure it doesnât need changed.I was frustrated by the fact it didnât include everything for calibration and it should be advertised that you will need to purchase the ec/tds calibration liquid separately.I do love how easy it was to switch between Ph, tds, and that it displays the temperature.The instructions are included but it does tell you when you calibrate the EC to go to that setting but it is not an option on the meter, the meter shows, ph, ppm and ys/cm. When calibration occurs you use the ys/cm mode because there is no ec mode.Itâs kinda confusing because the instructions donât mention ppm so I donât really know what that is, maybe thatâs the ec, maybe itâs the tds. Either way I use the ys/cm as the tds. I would love some clarification.Besides that I still like this one and I have used it every day since I got it.
D. –
Impressively accurate pH meter post-calibration. TDS meter also decent.
Decent little pH meter once you calibrate it. By default, my pH 7.0 solution was reading a pH of 6.8. After calibrating with the included pH 6.86 buffer solution, my 7.0 solution was giving me a pH of 7.01 @ 24.9C which is spot on. The TDS meter was also only off by 3% from my 1413 calibration solution, pre-calibration. Needless to say, for the price of the device, I’m shocked by the accuracy.Functionality wise, it’s very easy to use. You can switch between measuring pH, PPM, or EC just by pressing the Mode button on the device. Love the backlit display, which makes it easy to work with in low-light environments.The device runs on 4 LR44 batteries. For the size of the device, AAAs would have been the better choice, but LR44s are also fairly cheap and common.Given the probe is meant to be stored in a electrode storage solution, the storage cap is a little awkward given it’s round tip. Luckily, I do happen to have a solution storage organizer that’s meant to hold a pH meter of this shape and size. At least the tip of the device does have a gasket, so when the cap is on you don’t have to worry about the probe storage solution leaking from the cap.
JAD Adventures –
Super accurate
I’m impressed with this little device. It’s awesome that it comes with the calibration packets you need to make sure your pH readings are spot on. That’s a huge plus. The fact that it also has a TDS meter and I could confirm its accuracy against my own Zero Pitcher TDS meter is really reassuring.This thing is incredibly accurate and a fantastic value, especially at the current sale price. I’ve seen these meters go for a lot more, so getting a good, accurate one for under twenty bucks is a steal. It’s so easy to use and seems durable enough to last for years. Highly recommend for those who need to test their water for drinking, pools, aquariums, etc.
Gal in Cal –
Good so far, but calibration process could be clearer
I tried out this multifunctional 4-in-1 digital pH meter right out of the box to test both my pool and hot tub water. Even without calibration, the readings lined up well with my test strips and where I expected the pH to be. Itâs really nice to get an exact number rather than trying to match colors on a strip.The display can be a little hard to read in bright daylight, and I wasnât sure at first whether I should hold it still or move it around in the water. I found that gently agitating the water for a minute or two helped the reading stabilize and gave repeatable results.I havenât gone through the calibration process yet, but the instructions are a little unclear about whether calibration is required before the first use or only after some time. If it does need to be done right away, it would be better if the manufacturer included more than one set of calibration packets.Overall, the meter seems accurate and convenient to use. A clearer calibration guide and a few extra buffer packets would make it even better.