General description Suitable for water sources, aquariums, hydroponics, spas, swimming pools, and other water systems, this 3 in 1 Portable Digital EC PH Temperature Tester is a multifunctional water tester that measures pH, EC, and temperature of all liquids. It features a large LCD screen for easy reading of displayed values and is designed with advanced microprocessor technology for high efficiency and accuracy. Its lightweight and portable design makes it convenient for both indoor and outdoor use.