The Bluelab OnePen is a 3-in-1 pH, conductivity (EC/PPM) and temperature meter that optimizes nutrient absorption. It can be connected to the Edenic app via Bluetooth for real-time sharing, updates and comprehensive data management. The probe is replaceable and the probe status is displayed. The device has an ergonomic design and a high-contrast backlit display. Readings are accurate with a resolution of 0.01 pH. pH and conductivity (EC) can be displayed simultaneously. Conductivity can be measured in EC, CF, PPM 500 (TDS) or PPM 700, while temperature is measured in ˚C or ˚F. The device is dust and waterproof to IP68. When connected to Edenic, measurements can be viewed remotely via the app or browser, as well as data sharing and software updates in real time. Delivery includes 1x Bluelab OnePen with replaceable pH, conductivity (EC) and temperature probe, 3x 18ml / 0.6 fl.oz Bluelab Solution Sachets (pH 7.0, pH 4.0, KCl Storage Solution) and 1x Bluelab sensor cleaning brush. 2x AAA batteries are required.