Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow

Bluelab Conductivity Pen promotes healthy growing with precision A compact and robust handheld solution Key features include: Fully waterproof - not just water resistant Selectable measurement units so you can customize with your preferences Automatic temperature compensation for accurate readings everywhere Flat electrode for easier cleaning and maintenance Everyday accuracy of the fundamentals Providing quick and accurate readings at the click of a button.

For conductivity readings, you can choose between EC, CF, PPM 500 (TDS) or PPM 700; for temperature, you can select °C or °F.