Water Quality Testing Pen

Equipped with an LCD digital display, it can clearly show the TDS value (usually in ppm) in water directly. Compared to traditional chemical reagent testing methods, this instant reading avoids waiting time and color comparison errors, giving users a sense of "scientific, accurate, and trustworthy" feel. It features a streamlined pen-like design, compact in size and lightweight.

What's in the box
1 X Water quality testing pen