Bluelab OnePen™ – pH, EC & Temperature Meter

Measure pH, EC & Temperature with One Professional Tool

The Bluelab OnePen™ is an all-in-one digital meter that accurately measures pH, electrical conductivity (EC), and temperature in nutrient solutions. Designed for hydroponic, aquaponic and soil growers, this compact testing pen helps you maintain the perfect growing conditions for healthier plants and higher yields.

With Bluetooth® connectivity, the OnePen™ pairs seamlessly with the Edenic® app, allowing you to view measurements remotely, store data, and receive software updates for an even smarter growing experience.

Accurate Nutrient Monitoring Made Simple

Proper pH and nutrient strength are essential for maximum nutrient uptake. The Bluelab OnePen™ provides fast, reliable readings with a high-precision 0.01 pH resolution, helping you make informed adjustments to your nutrient solution.

Its bright backlit display shows pH and EC readings simultaneously, making testing quick and easy in any growing environment.

Smart Bluetooth Connectivity

Connect your OnePen™ to the Edenic® app to unlock advanced monitoring features.

Benefits include:

• View readings remotely via the Edenic® app or web browser
• Store and manage measurement history
• Access real-time data
• Receive software and firmware updates
• Keep detailed records of your nutrient management

Built for Hydroponic Growers

The Bluelab OnePen™ features a durable, ergonomic design that is comfortable to use and built to withstand demanding grow room conditions.

Its IP68 dustproof and waterproof rating provides reliable performance, while the replaceable double-junction pH probe and titanium EC electrodes deliver long-lasting accuracy and simple maintenance.

A built-in probe health indicator also lets you know when it’s time to service or replace the probe for consistent results.

Easy Calibration & Maintenance

Calibrating the OnePen™ is quick and straightforward with its simple two-point pH calibration process.

The replaceable pH probe helps extend the life of the meter, with genuine Bluelab OnePen™ Replacement Probesavailable separately.

Key Features

• Measures pH, EC and temperature in one device
• Bluetooth® connectivity with Edenic® app
• Simultaneous pH and EC display
• High-accuracy 0.01 pH resolution
• Replaceable double-junction pH probe
• Durable titanium EC electrodes
• Probe health indicator
• Simple two-point pH calibration
• Backlit LCD display
• Compact, lightweight ergonomic design
• IP68 dustproof and waterproof rating
• Temperature readings in °C and °F
• Automatic software updates via Edenic®

Measurement Modes

The Bluelab OnePen™ supports multiple conductivity units, including:

• EC
• mS/cm
• CF
• ppm 500 (TDS)
• ppm 700

Specifications

• Measures: pH, Electrical Conductivity (EC) and Temperature
• pH Resolution: 0.01 pH
• Connectivity: Bluetooth®
• App Compatibility: Edenic®
• Waterproof Rating: IP68
• Temperature Units: °C and °F
• Replaceable Probe: Yes

Why Choose the Bluelab OnePen™?

The Bluelab OnePen™ combines three essential water measurements into one compact, easy-to-use device. With professional-grade accuracy, Bluetooth connectivity, and a rugged waterproof design, it’s the ideal testing pen for hydroponic growers who want reliable results and smarter nutrient management.

Whether you’re maintaining a small home grow or a commercial cultivation system, the OnePen™ makes monitoring your nutrient solution faster, easier and more precise.