HortiCare pH Tester by Trans Instruments will help you acquire the right PPM level of specific nutrients solutions, and help you meet specific plants nutritional requirements. This unit will help you achieve each plant's preferred nutrient concentration and facilitate the absorption process to the roots. Wrong concentration may result in wilting and suppresses plant growth. HortiCare Nutrient concentration check tester is specially designed with advanced features to ensure fast and accurate concentration test, for the commercial as well as home growers. It has convenient features such as; precise PPM measurement that uses commercially acclaimed 700 measuring factor and Beep Function - the ability to beep to signal the beginning and end of each function. You can also obtain accuracy through one-touch calibration and the auto-lock function provides intelligent sensing of end reading. Operating Range: 0 to 1,990ppm. | Display Resolution: 10ppm. | Accuracy: ±5% full scale. | Calibration Point: 990ppm (KCl).