Introducing the water quality tester, a versatile 4-in-1 water quality test pen designed to meet your testing needs. Easily detect the pH of water with a range of 0.01-14.00pH, ensuring accurate readings for various applications. The conductivity detection feature covers a range of 0-10000uS/cm, providing insights into the total dissolved solids in water. This innovative device is equipped with high-precision electrodes featuring titanium alloy probes, guaranteeing precise measurements every time. The national-standard pH range of 6.5~9.5 ensures optimal water quality, with 7.0~8.5 being ideal for human consumption. The LCD display offers clear and easy-to-read values, making it suitable for use in diverse settings such as drinking water testing, aquaculture, swimming pools, and scientific research units. With a temperature range of 0.1-60.0 Celsius Degree and a TDS range of 0-1000ppm, this water quality test pen is a reliable tool for a wide range of testing scenarios. The large-capacity button battery ensures durability and convenience, powered by 3 1.5V button batteries that are easy to replace. Item Name: Tester Pen Material: Plastic PH Range: 0.01-14.00pH EC Range: 0-10000uS/cm TDS Range: 0-1000ppm TEMP Range:0.1 Celsius Degree-60.0 Celsius Degree Measurement Accuracy: 0.01 Power Supply Voltage: 3 x 1.5V Resolution: 0.01 Battery: 3 x 1.5V Button Batteries(Battery Not Included) Features: Portable, Easy to Use, Reliable Size Details: 18.3cm x 3.7cm/7.2" x 1.46" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Tester Pen 3 x Calibration Powder