A great quality digital TDS meter to test for dissolved solids including salts and nutrients. It is ideal for enuring the water you’re using for cultivating carnivorous plants is safe long-termThis TDS meter will display the TDS in parts per million (ppm). For example, a TDS reading of 1 ppm would indicate there is 1 milligram of dissolved solids in each kilogram of water.
Carnivorous plants should not be watered with water which exceeds 50ppm.
This unit comes with batteries.