Milwaukee Instruments AG900 provides instant readings of the three most important factors in efficient plant production: pH, EC, or TDS. The AG900 kit comes with an SM802 hand held microprocessor, calibration solution, measuring cup for soil testing, a comprehensive 21-page Operational and Testing manual, 9v battery as well as a protective carrying case.
Frequently Asked Questions
Q: Why are PPM, TDS, pH and EC important?
A: PPM and TDS are abbreviations that represent the concentration of elements in a solution or atmosphere. PPM is short for parts per million and TDS for total dissolved solids. EC (electro conductivity) is another form of measurement for TDS. PH is a measure of acidity or alkalinity which dictates plant uptake of particular elements