PH-009 Digital pH Meter [Mash, Star San Effectiveness & More]
PH-009 Digital pH Meter. Measures pH range 0 to 14. .1 resolution.
Use the pH meter to check the pH of your water, mash, [test Star San effectiveness] and finished beer.
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High Quality Digital Pocket Pen Type Precision PH Meter & Digital Tester Hydro New – PH-009
Also: All Grain Tips & Gear | Star San Tips, Tricks and Guidelines
I bought this a few weeks ago and had to return it because it was wildly inaccurate and wouldn’t stay calibrated. Cheap junk. Just buy the ph strips and save yourself the headache.