Hanna Instruments HI98118U GroLine Waterproof Hydroponic pH Tester

Built in temperature sensor for Automatic Temperature Compensated measurements. Cloth junction providing a larger surface area than a standard ceramic junction. Stability indicator that disappears once a stable reading is obtained. Automatic calibration to one or two points at a push of a button.You may also like Hanna Instruments High Range Nitrate Checker HI782.