Quality Horti-Care Digital EC Meter

CF or TDS testers are designed for measuring total dissolved solids in hydroponic systems. Nutrient levels are often expressed in parts per million (ppm), µS or CF, so it is helpful to know that 65ppm is equivalent to one CF unit, (10 CF units are equal to 1,000 µS).

One method of checking the strength of a nutrient solution is to measure how well it conducts electricity. Although absolutely pure water is not a conductor, the flow of electricity increases proportionally as salts are added.

Measuring electrical conductivity (EC) is a direct indication of the nutrient level in a solution. A conductivity tester (CF or µS) determines conductivity by measuring the amount of electricity that passes between two electrodes placed in the solution.

• water resistant
• float on water
• drop shock
• simple to use
• one touch calibration