🔬 Highly Accurate & Fast Combination pH Electrode with Long BNC Connector Cable & Calibration Powder, Wide 0~14 pH Measurement Range for Sea Water and Acid Rain Review

Includes everything you need including calibration solutions (4.1, 6.8, 9.3) and screwdriver. There is a suction cup holder but it's useless so buy your own.

Great meter, PH takes time to settle. When calibrating, be sure to leave it in water for at least half an hour. I compared with a Cole Partner flow meter and ended up with a deviation of about 0.15 PH at 7.

Used product does not work Box sealed with tape Batteries are empty The device cannot be switched on with the supplied power supply unit. The photos speak for themselves. There is also an RMA form in the box.

This is a continuation after 8 months. These still work fine. I have another double counter that has already failed. The salinity went first. I recommend them and understand that PH changes throughout the day so don't overreact to any particular level.

I tried to calibrate this thing but it was always off. I followed the instructions and it was just everywhere. Luckily I bought a Hanna Ph tester. I tested Hanner Checker 3xs and the readings were the same. At the same time, he never stopped at a number, not even for a split second. It jumps and wobbles far from the correct display. How much time and money I have in my reef tank, I wouldn't trust this thing AT ALL!

What a disappointment! I just wanted to control the pH. Received product with pH sensor floating in the box, no cap or cap on the sensor. . . THAT DOES NOT WORK ! . . . I can measure the same water 5 times and get 5 different readings + or - 3. Not 3 points but a full 3 ph deviation. SAVE YOUR MONEY! ! ! Why is there so much JUNK on Revain? LoL, the temperature sensor works great, but that makes it expensive.