This TDS meter is a small hand-held device used to indicate the Total Dissolved Solids (TDS) in a solution, usually water. Total dissolved solids (TDS) are the amount of organic and inorganic materials, such as metals, minerals, salts, and ions, dissolved in a particular volume of water; TDS are essentially a measure of anything dissolved in water that is not an H2O molecule.

Feature: 100% Brand New and high-quality Hold function: Saves measurements for convenient reading and recording Auto-function: Turns off meter after 10 minutes of non-use to conserve batteries Dual Range: Measures from 0-999 ppm, with a resolution of 1 ppm. From 1,000 to 9,900 ppm, the resolution is 10 ppm Range: 0-9990 ppm Accuracy: +/- 2% Battery: 2 x 1.5V Button Cell Battery (AG13) – Included Auto-function:Turns off meter after 10 minutes ype:Water Tester Purity Sub-Type:Water Tester Use: Testing water quality Packing Size:16*3.5*2.5cm(L*W*H)

How to Use: Pull out the cap Click the button on/off,and insert the plub into the liquid. When the reading is steady,click the button "Hold",then,get the result After use,clear the plub. Note: This item can be used in water purifiers and filters, food (vegetable, fruits) & drink quality monitoring, pools, spas, aquariums and hydroponics. Do not drop the entire TDS meter in water or dip beyond the maximum immersion level (approximately 2″ – refer to manual for further information). This unit is not water- tight and will be damaged if water enters the unit.