HortiCare pH Check (Nutrient pH test)The HortiCare pH Check is able to measure the nutrient pH accurately. It is portable and simple to maintain with regular calibration. The auto-endpoint feature makes calibration and each measurement consistent and accurate. You don't need to be a specialist to take an accurate reading. The HortiCare pH Check puts the professional touch to your hydroponics hobby, where only commercial growers dominate.Press Button Calibration: Effortless calibration with a single touch of the button.Auto-Endpoint Reading & Calibration: Always give you the right reading, the tester is able to lock to an endpoint reading, thus eliminating guesswork.Hold Function: Able to freeze display for ease of reading.