Bluelab pH and Conductivity Pen Set, Starter Pack

Everything you need to measure pH, conductivity and temperature Handheld design is compact and convenient The backlit display is bright and easy to read Designed for nutrient reservoirs, the Bluelab pens are waterproof and float in any solution Bluelab pH Pen Measure pH and temperature Double-junction probe and simple, 2-point pH calibration with 30-day reminder Bluelab Conductivity Pen Measure conductivity in EC, ppm 500 (TDS) and ppm 700 scales Read temperature in C or °F Factory calibrated and ready to use out of the box