Digital pH Meter.  Auto calibration button.  ATC.  0.00-14.00 pH Measurement Range.  + Includes pH buffer powder.

You can use a pH meter to check the pH of your water, mash, [test Star San effectiveness] and finished beer.

Digital pH Meter – Pocket SIZE – pH Pen Tests Household Drinking Water, Aquarium, Swimming Pools, Hydroponics, Water Quality, with ATC, 0-14 pH Measuring Range with 6x pH Buffer Powders. Purple