Tds Meter Product Feature: High Accuracy Titanium Alloy. Automatic Temperature Compensation: 0 ~60.Working temperature: 0 ~50. Meter Can Hold function. For convenient reading and recording, the meter saves measurements. Turn off Auto-function: Turns off meter non-use to conserve batteries. Measurement ranges from 0-9990 ppm. This water Tds meter can be used for testing water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools, spas, aquariums, and hydroponics. A Must-Have Tool for room, Aquarium, aquiculture How Pure is Your Water? With the push of 1 button, the digital TDS water tester can browse the overall water purity level, which can be displayed on the screen in ppm (parts per million). Dumsamker TDS water testing meter is right for all water purification applications, therefore to ascertain whether or not your filter is doing its job right and once to alter the filter. With TDS water take a look at the meter, All you wish to try to do is to place it within the water and take a look at it. EASY TO USE AND HANDY Just stick this Digital TDS Water meter tester into the water of 1 inch deep, then stabilized readings will be auto-locked on the LCD screen in a second, the meter has an auto power-off facility. Meter automatically stops after 5 minutes to save the battery if it not in use. Digital Tds Meter for Water Testing has a great function i.e hold function which saves measurements for convenient reading and recording. This Digital TDS Meter TEST OUR WATER PURITY How pure is your water? This Handy Digital Water TDS meter pen is lightweight. It Can test the water purity, Just stick it in about 1 inch deep of water, then this Digital TDS water tester Pen Type can tell us our water purity level, which will be displayed on the screen in Parts per million (ppm).