pH Meters

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...