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The HANNA pH EC TDS Meter continuously monitors the three most crucial nutrient parameters in hydroponic, greenhouse and horticultural applications. Includes a large, dual level, back-lit LCD to give instantaneous readings, even from a distance.
The HI 991404 ships complete with a non-clog double junction pH electrode and a rugged conductivity/ TDS sensor, 12 volt power transformer and buffer solutions 4 and 7 together with conductivity calibration solution. Warranty: 2-years (six months on electrode).
Instruction Manual (PDF)
To prolong the life of the electrode, we recommend washing it monthly by immersing it in cleaning solution (HI 7061) for half an hour.