Hanna GroLine HI98318 Waterproof EC/ TDS ppm Pen

The Hanna GroLine HI98318 Waterproof EC/PPM Pen is a portable and easy-to-use meter designed for measuring electrical conductivity (EC) and total dissolved solids (TDS) in various aqueous solutions, including hydroponic nutrient solutions.

Hanna GroLine HI12943 Soil / Substrate pH Electrode for HI9814

The Hanna GroLine HI1294 Soil/Substrate pH Electrode is specifically designed for use with the Hanna HI9814 GroLine pH/EC/TDS/°C Meter with CAL Check. It's intended for accurate pH measurements in soil or substrates.