This pH meter is the perfect device for testing the acidity or alkalinity of liquids. It comes with a small screwdriver for calibration. It is easy to use - simply remove the protective cap and immerse the electrode in the solution to be measured. Included with the meter are 6.86 and 4.01 pH buffers for an calibration. Instructions for calibration are also included with the pH meter.
One year warranty
I have been using my pH meter for two years now and use it more often to test pH than I use the drop test for pH. I can't discern between the colors on the pH comparator block, so the meter gives me a quick, accurate reading without any fuss. It does need to be calibrated (about every 5 months), but it comes with buffer solutions OR you can use the pH standard to calibrate it. It is easy to calibrate it. I highly recommend using it in conjunction with phenol red pH test.
Comes with 3 x AG 13 button cell batteries OR 4 LR44 batteries