MULTIFUNCTIONAL UPGRDE Professional TDS Test, EC Test, Temperature Test and pH Test 4 in 1 water quality test kit. Upgrade with big backlit LCD for easier detector for Drinking Water, Hydroponics Aquariums, Fishpond, Swimming Pools. ACCURATE AND RELIABLE The numbers of the pH meter range from 0.00-14.00 (PH), while the numbers of the digital EC and TDS meters range from 0 to 19990 ppm. PH Resolution is 0.01pH, Accuracy 0.05pH.TDS: 0 ~ 9990ppm, Conductivity: 0 ~ 9990us / cm, Accuracy: 2% OUTDOOR CAMPING WATER QUALITY TEST TDS Meter Digital Water Tester is small in size, easy to use and carry, especially when camping, there are not only can detect drinking water, but also can be used for scientific research EASY TO USE Just turn on the PH water tester and TDS Meter Digital and gently stir the water to test the purity and PH value of the drinking water, And monitor whether the reverse osmosis system achieves the best performance. PH tester digital with LCD display, the product also adds a backlight function, you can see the test data more directly WIDE APPLICATION Ideal for Home and Laboratory PH Testing, Including Drinking Water, Electroplating Liquid, Boiler Water, Water in Fish Tank, Water of Swimming Pools, Photograph Flushing Fluid, Well Water, Deep Phreatic Water, Aquaculture, Food Processing and More.