HANNA GroLine Waterproof Hydroponic PH Tester HI98118 -New In Box- Hanna Instruments latest pocket meter for measuring the pH of a hydroponic nutrient solution. This modern looking meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. Has a very large and easy to read LCD display that shows both pH and temperature along with calibration, stability and low battery indicators. Features: Built in temperature sensor for Automatic Temperature Compensated measurements. Renewable junction to clear any clogging that causes readings to drift and be erratic . Stability indicator that disappears once a stable reading is obtained . Automatic calibration to one or two points at a push of a button. Uses Hanna's Quick Cal pH/EC standard with a pH value of 6.86. The standard can also be used to calibrate conductivity meters to 5,000 μS/cm . Battery % level remaining displayed at start up. Low battery indicator that is displayed when less than 10% battery life is remaining. MSRP $121