The Bluelab OnePen is an advanced 3-in-1 tool designed to measure pH, conductivity (EC/PPM), and temperature, helping growers optimize nutrient uptake for healthier plants. With a high-contrast backlit display and ergonomic design, it provides precise readings with a 0.01 pH resolution and simultaneous pH and conductivity measurements. The OnePen also offers flexible measurement options, allowing you to track conductivity in EC, CF, PPM 500 (TDS), or PPM 700, as well as temperature in both ˚C and ˚F.

What sets the Bluelab OnePen apart is its Bluetooth connectivity to the Edenic app, enabling real-time data sharing and remote monitoring. This feature allows growers to view measurements on the app or browser, receive software updates, and monitor probe health. With a replaceable probe and IP68 dust- and waterproof rating, the OnePen is durable and built for long-term use in any growing environment.