Bluelab OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe

Quick and Accurate: OnePen delivers the fastest time to a stable pH and Conductivity (EC/PPM) reading on the market, automatically adjusts the reading based on temperature, and is accurate to ±0.01 Waterproof and Extremely Durable: The OnePen is IP68 rated (dustproof and waterproof to 1 meter), and the replaceable double-junction pH probe with titanium electrodes simplifies upkeep and enhances probe longevity. Plus, it floats! Smart & Connected: Easily manage your test data with Bluetooth sync and our Edenic app to manage, track and share data. Track the history of your grow and combine data in one place with other Bluelab tools such as the Guardian Wifi Monitor. A Joy to Hold: Made from lux, premium materials with an ergonomic and durable design, a high-contrast screen for low-light readability, and a cap that maintains your probe health. The Professional Grower's Choice: Bluelab is the professional’s first choice for testing & monitoring tools. The OnePen is the culmination of 30 years of engineering expertise in hydroponic measurement.