PurGro GroBot pH Probe, Industrial Replacement spl_hgc The S-line is a revolutionary

The S-line is a revolutionary series of fans that combine energy efficiency

Unlike other brands

Their EC motors are highly efficient

making the new RAZR family ideally suited for full-cycle cultivation of leafy greens

Choose from either Conductivity

PurGro GroBot pH Probe, Industrial Replacement spl_hgc The S-line is a revolutionaryThese don't look like the ones from the hydro store because they are double junction, flat surface pH probes typically used in chemical plants for process control. They last longer, stay cleaner and are built to mount in line inside your GroBot Evolution. Cost a few bucks more, but these are the good ones. Proudly made in the USA.