Bluelab EC Pen

A compact, fully waterproof EC pen for quick conductivity checks in any growing environment. Knowing the EC of your nutrient solution before and during feeding is the most direct way to confirm that plants are receiving the right nutrient concentration at each stage of growth. Too low and the plant is underfed; too high and osmotic stress sets in. The Bluelab EC Pen gives you that number quickly and reliably, anywhere in the grow space.

The flat electrode design makes cleaning and maintenance more straightforward than recessed probe alternatives, reducing the buildup that causes drift over time. Automatic temperature compensation ensures accurate readings regardless of solution temperature, and the hold-reading function captures the measurement on screen for easy recording. Selectable measurement units allow the display to be set to EC, CF, or ppm to match whichever unit your feeding program uses. Fully waterproof, not just splash resistant. Auto-off extends battery life. 1x AAA battery included.