Bluelab® Conductivity Pen (EC or ppm)

The Bluelab Conductivity Pen is a robust, floating handheld meter designed for growers who need quick, reliable readings of electrical conductivity (EC), total dissolved solids (PPM), and solution temperature. Factory-calibrated with selectable scales-EC, CF, PPM-500, and PPM-700-this pen provides professional accuracy without lab complexity.

Featuring automatic temperature compensation, a backlit LCD, and waterproof casing, it excels in grow environments. Reads within ±0.1 EC, ±1 CF, ±50 ppm (500 scale), ±70 ppm (700 scale), and ±1°C / ±2 °F. Auto-off and hold functions improve usability, while the AAA battery makes it ready to use right out of the box. Monthly cleaning is recommended to maintain accuracy.