A highly accurate pocket pH meter, offering 1 to 3 points calibration functionality with auto-buffer recognition for USA and NIST standards. Automatic temperature compensation provides accurate readings across the entire measurement range. The round glass bulb electrode is perfectly suited for measuring the pH of liquids. Equipped with a high-clarity LCD display, the HL101 is designed for maximum ease of use, with auto-hold functionality to freeze a stable reading for ease of recording. A visible battery indicator and auto-off functions effectively conserve and communicate battery life to the user. A fully replaceable electrode module reduces maintenance costs.