Bluelab OnePen — 3-in-1 pH, EC & Temperature Meter (Bluetooth + IP68) Take the guesswork out of feeding with the Bluelab OnePen, a compact 3-in-1 meter that measures pH, conductivity (EC), and temperature in nutrient solutions. Accurate measurements help you dial in feeding, support optimal nutrient uptake, and keep your reservoir running consistently—whether you grow in hydroponics, coco, or other nutrient-based systems. What sets the OnePen apart is its replaceable, high-quality probe system and smart connectivity. The pen features a double-junction pH probe and titanium EC electrodes for reliable performance in tough grow environments. With Bluetooth connectivity, you can link it to the Edenic app for real-time updates and easier data management across your grow. Key Features 3-in-1 readings: pH, conductivity (EC), and temperature Replaceable probe system: double-junction pH probe + titanium EC electrodes High precision: 0.01 pH resolution Backlit display with simultaneous pH + EC readings for quick checks Probe health indicator to help maintain accuracy Simple 2-point pH calibration Temperature display in °C or °F Multiple conductivity units: EC, mS/cm, CF, ppm 500 (TDS), ppm 700 IP68 rated: dustproof and waterproof for grow-room durability Replacement probe available separately (Bluelab OnePen Replacement Probe) Edenic App (Bluetooth) Benefits When connected to the Edenic app, you can: View measurements remotely via the app or a browser Access real-time data and receive software updates Ideal For Growers who want a reliable, portable meter to quickly verify nutrient solution strength and pH—plus the convenience of Bluetooth tracking and a replaceable probe for long-term value.
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