Kindle Customer: This works well for my hydroponics and my pool. I didn't calibrate the pH meter at first because it seemed pretty accurate, it read 6.5 in 6.8 solution, close enough for my purpose. I did calibrate it later, and it was simple. I hope it continues to work well. I rinse it in distilled water and dry it after each use. The TDS meter works well too. I just wish the part you stick in the water was longer. Sometimes it's hard to see how far it's in the narrow mouth hydroponic mason jar.
United States on May 17, 2021
Geo thee great: Arrived quickly but I didn’t use it immediately once i did it didn’t work at all...it was a cheap ph meter so I ordered another one...I had to calibrate it but it worked...two days later when I actually needed it it wasn’t workin again...too late to return original so I’m attempting to return this second one and jus ordered another one because I can’t find one locally...hopefully third time is a charm Rt 🤔
United States on Feb 18, 2021
Tory T.Tory T.: Ordered a brand new one of these and it didn’t calibrate correctly so Amazon sent me a replacement. I received it in a box saying it was refurbished and guaranteed tested to work. Upon opening the box, I found this note from the old customer, as well as a calibration package missing. 0/2 on this item so far. Don’t waste your time or money on this product. Order an HM
United States on Jan 14, 2021
Adam Drew Griser: Easy to use. Good price for a set of these meters. Both a PH and TDS meter was included for $17.99. The PH meter though could have included another set of calibration powders if I would need to calibrate it a 2nd time but could prob find a workaround for this by finding a water source with a known ~6.86 ph.
United States on Oct 19, 2020
| PH and TDS Meter Kit by GroTheory - Perfect for Accurate Water Testing | Yimusen Digital pH Meter for Accurate Water Quality Testing | PentaBeauty PH Meter 0.01 PH High Accuracy Water Quality Tester for Accurate Measurement of pH Levels | |
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| B2B Rating |
86
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96
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94
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| Sale off | $8 OFF | ||
| Total Reviews | 178 reviews | 58 reviews | 258 reviews |
| Item model number | PH Meter and TDS Meter Combo | Yi-1 | 000030 |
| ASIN | B086JG935T | B098NBD3VZ | B08FRFZRYS |
| Customer Reviews | 4.1/5 stars of 1,229 ratings | 3.4/5 stars of 26 ratings | 4.0/5 stars of 1,057 ratings |
| Package Dimensions | 8.07 x 4.41 x 0.94 inches | 6.93 x 2.17 x 1.18 inches | 6.89 x 2.17 x 1.14 inches |
| Best Sellers Rank | #158,724 in Industrial & Scientific #268 in Lab pH Meters | #332,307 in Industrial & Scientific #592 in Lab pH Meters | |
| Manufacturer | Grotheory | Digital PH Meter | PentaBeauty |
| Item Weight | 3.52 ounces | 2.89 ounces | 10.8 ounces |
| Batteries | 1 LR44 batteries required. |
United States on Jun 26, 2021