PH Meter & TDS Meter, 5 in 1 Salinity PH Temp EC and TDS Tester, 0.01 High Accuracy Digital Display, LCD Backlit, ATC, IP67, for Swimming Pool, Drinking Water, Hydroponics and Aquarium

Directions say calibrated out of box not true!! There are instructions how to calibrate and when calibrating it goes below the ph readings so u can't get the 4.01 or 6.8 jumped right past them so u can't even calibrate the unit!! Do not buy it is a waste of money!!!!

Not reliable, hard to calibrate, LED screen is of poor quality and fads out

The written manual is completely different than the video. To make it worse, theres only 1 packet for each pH, so if you make a mistake, that's it. I'd look for a different one honestly

This ended up not being very useful for me. Even after the calibration, I wasn’t able to get accurate pH readings. I wanted this for use with my pool and to understand how much of different chemicals I needed to add. I wasn’t able to get the precision needed to understand what to add chemically with this pH tool so I reverted back to bottle test.

For $17 this 5-in-1 water tester is an ok deal. It can test PH, Salinity, TDS and EC. It also measure temperature in C or F. There are 3 calibration power packets. The unit display is bright with green backlight. It comes with batteries and a plastic carrying case.

is advertized as Ip67 waterproof ... it is NOT waterproof. first time i used it, it filled up with water and did not work.