High Precision Using titanium alloy probes and the latest sensors, you can get almost precise measurements every time. Additionally, measuring equipment can be easily recalibrated if improved accuracy is required. Easy to Use Simply dip in the measuring device, stir and get results in seconds. No calibration or setup required, you can use it right away. Save money: No need for expensive lab tests or professional equipment, you can get reliable results at home . Simple and InstantProfessional pH meter, TDS meter, EC meter and temperature measuring device 4 in 1. You can learn about water quality in just a few seconds. Equipped with a calibration function to ensure measurement accuracy. Scope of application Check the TDS or EC of your aquarium, swimming pool or water source. You can determine the efficiency of your reverse osmosis, deionization or distillation system, check the nutrient content of your hydroponic setup, and much more. Product size: 154*30* 14mm Note: The data are all manually measured, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to actual item received.