VIVOSUN Digital pH Meter, 3-in-1 TDS/EC/Temperature Meter, 3-in-1 Soil Moisture/pH/Light Tester Combo for Home, Garden and Hydroponics, Yellow-Blue-Green

Very accurate did the calibrations needed to do no adjustments right on queue thank you very much. Excellent product.

For the $$ this is a great tool to have for the hobbyist or beginner

Everything works except for the three-in-one soil moisture light and pH tester the moisture seems to work and the light meter may work I can't disprove it because it's in lux instead of ppfd but the pH tester does not work it always says 7 to 8 even when I mixed a 4.0 solution

the meters are great . only issues is constant calibration of the ph water meter . which if you want good reading calibration is important but this one seems to need a little extra calibrating . other than that i get good consisent readings from all tbe devices the tds meter and the soil multi meter .

PH meter is horrible won’t calibrate the third 9.18 buffer packet ….. the ppm meter is great so far , it is claimed that the ppm meter is already calibrated upon leaving the factory

What do I like about this kit? NOTHING. To begin with, they aren't waterproof. What kind of idiot designs a product that is to be immersed in liquids, but doesn't make it waterproof? There isn't even a line on the devices to illustrate where the sensitive electronics begin. That information is pointed out on a slip of paper included with the device. It wouldn't cost the company more then 5 cents per unit to use silicone to waterproof them, so it's just a case of cutting corners for maximum profit. But that wouldn't be the end of the world. Sure, it's a dumb decision, but it isn't necessarily a deal breaker. And you could replace these every month for two years before you hit the amount of money that you would spend on a laboratory grade pH tester. So, there is that. The major problem is that it simply isn't accurate. The pH tester seems to calibrate just fine, but every time that I test the same sample, I end up with a different number. It's the same sample, how can the numbers change every time I dip the sensor in the water? And I don't mean, "It was 5.7, and now it's 5.9." I mean, "It was 5.7, and now it's 4.8, no, now it's 6.2, wait it's 5.3" ***sigh*** Then there is the device settings itself. The backlight shuts off after two minutes, but it takes up to 5 minutes to get an "accurate" reading according to the manual. The dark gark grey text on a light grey background isn't super easy to read after the light turns off. Pushing the power button will turn the light back on. Or maybe it will turn the device off. The R-N-G Gods will determine that for you. The device has a 5 minute auto-shutdown that can't be disabled. What kind of idiot designs a device that shuts off at the EXACT MOMENT it is supposed to achieve an "accurate" reading? And, then, when you restart the process you get a different result. This is the only Vivosun product that I own. It will be the only Vivosun product that I EVER own. You get what you pay for. And what Vivosun has taught me with this device, is that Vivosun provides cheap trash to unsuspecting customers. I'll be purchasing a proper waterproof, lab grade pH tester. If I'm gonna get high quality hydro grows, it only makes sense to invest in decent equipment.

Works well

I have owned this Ph and TDS kit for about three weeks now, and so far it seems to be holding calibration well. I compared this PH meter to my friend's high-end PH meter and was pleased to see they only differed in readings by a very small amount. I do recommend storing the PH probe in H2O Sync pH/ORP Electrode Storage Solution or another similar product. to maintain the accuracy and longevity of the probe. And would also recommend periodically calibrating the probe using BOJACK 15 Pack of pH Meter Buffer Solution Powder for Precise and Easy PH Calibration. All of which can be purchased on Amazon for a small price. If you are checking the PH and TDS levels of water for watering plants, then this is an inexpensive and pretty accurate way of doing so without breaking the bank.

Perfect

Not good it never worked....

Sent the item back because the soil tester and ph wasn't working and the water PH tester had dried buffer powder suggesting it was a returned item before sending it to me. Waste of time I can't get back so I sent them back to seller.

Nice combo, the PH meter was broken but was refunded and I got a replacement.

Super cool comme instrument