OCEAN STAR Digital Portable Pen Type pH Meter Tester with LCD Display Digital pH Meter

Easy use: press the switch - dig it into test water - press hold button after the numerically stable - take out to read. Nothing could be easier. "hold" automatic locking, "shift" automatic conversion, 5 minutes automatic turn-off. What is tds: total dissolved solids are the total amount of mobile charged ions, including minerals, salts or metals dissolved in a given capacity of water, it is directly related to the purity of water and the of water purification systems and affects everything that consumes, lives in, or uses water, whether organic or inorganic, whether for better or for worse. Easy use: press the switch - dig it into test water - press hold button after the numerically stable - take out to read. Nothing could be easier. "hold" automatic locking, "shift" automatic conversion, 5 minutes automatic turn-off. Compact size and widely use: widely use indoor and outdoor, such as domestic water testing, camping or any outdoor exercise, fish farming, planting. Compact size that enable you to take anywhere. A Essential Tool For Every Household - Instantly check on the overall quality of the water you and your family drink. Know if your tap water purification system, such as reverse osmosis (RO) works properly or needs replacement, protecting your and your family's health! Know when is the time to change filters, maintenance the aquarium, add nutrients or remove contaminants from your water!.