Digital pH Tester by Sinoware. Large LCD screen. .01 pH resolution. Accuracy .05 pH. Measurement Range 0-14 pH. Features ATC (automatic temperature compensation between 32 and 122 deg F). Replaceable electrode. Includes meter, 4 x 1.5v button cell batteries, adjustment screwdriver, carrying case and manual.
You can use a pH meter to check the pH of your water, mash, [test Star San effectiveness] and finished beer.
10/4/17 1 PM Central: As of this posting a seller has this for just $5.99 with free shipping to US addresses. Note: Check out the Other Sellers on Amazon Page to see if this is still going. Price, shipping and availability can change quickly. Check the product page for up to the minute price and availability.
Recent Amazon Finds [view more]: