Portable: The water quality tester is small and compact, which can be used as a multi-functional tester for TDS, CE, Salt, SG, TEMP 5 in 1: The accurate water quality tester and Reliable is mainly used to test TDS (PPM /), CE (US / CM, MS / CM), Salt (%), SG (Sea severity) and Temp (C / F) Widely used: water quality can protect children, the elderly and pregnant women from unhealthy water. And it is also used in hydroponics, swimming pools and spas, aquariums, hydroponics, etc. High precision: The salinkoctor is simple and portable. Put the meter into the solution, it can react quickly and stably to the reading and has a calibration function to ensure high accuracy. Easy to use: just turn the TDS meter on and stir water gently, then stabilized readings will be automatically locked on LCD in seconds and the TDS PPM meter will automatically turn off if without operation over 2 minutes. Specifications-Size: 15.9x3.4x1.6cm / 6.26x1.34x0.63 inch.-Size: 2.8x1.7cm / 1.10x0.67 inch.Weight: