HM Digital’s PH-80 is an economically priced, water-resistant handheld with a resolution of 0.1 pH and an accuracy of +/-0.02 pH. This easy-to-use tester is fast acting and reliable. It includes digital calibration as well as onscreen diagnostic messaging and temperature in a large LCD display screen. The unit, co-designed in the US and Korea, is backed by a one-year factory warranty. http://www.hmdigital.com, info@hmdigital.com