HANNA GROLINE WATERPROOF EC/TDS TESTER

Description

HANNA GROLINE WATERPROOF EC/TDS TESTER is the professional-grade electrical conductivity and total dissolved solids meter from Hanna Instruments — the analytical measurement brand trusted by laboratories, commercial growers, and serious home cultivators worldwide. We have been recommending Hanna meters to UK growers since 2017 because EC measurement accuracy is as critical as pH accuracy in nutrient management, and Hanna’s build quality and calibration stability are demonstrably superior to budget meter alternatives.

Why EC Measurement Quality Affects Grow Outcomes

Your EC meter is the primary tool for ensuring nutrient solution strength is correctly calibrated for your plants’ stage of development. An EC meter that reads 0.3 ms/cm high will consistently push you toward under-concentrated nutrient solution; one reading 0.3 low leads to over-strength feeding that causes tip burn, calcium and magnesium lockout, and root zone salt build-up. Experienced growers know that unexplained deficiencies, slow growth, and persistent tip burn are often traced to a faulty EC meter rather than to the nutrient programme itself. The Hanna Groline Waterproof EC Tester uses a platinum-grade cell and automatic temperature compensation (ATC) that corrects readings for solution temperature — critical because EC readings vary by approximately 2% per degree Celsius.

Calibration and Maintenance

Calibrate the Hanna Groline EC Tester against the supplied or separately purchased Hanna EC calibration solution (typically 1.413 ms/cm at 25°C) before first use and weekly during active grows. Rinse the cell with clean water after each measurement and store the cap clean and dry. Clean the electrode cell every four to six weeks with a soft brush and dilute citric acid solution to remove mineral deposits that affect conductivity readings. Replace the electrode when calibration becomes unstable or when clean readings consistently differ from a known calibration standard despite fresh calibration solution.

Pair the Hanna Groline Waterproof EC Tester with the Hanna Groline Waterproof pH Tester and a set of EC calibration solution sachets for a complete, professional-grade nutrient measurement kit that takes the guesswork out of every mixing session.