Product Description
Bluelab OnePen™ – 3-in-1 pH, EC & Temperature Pen with Bluetooth & Edenic App
The all-in-one precision measurement tool for serious growers. The Bluelab OnePen™ simultaneously measures pH, electrical conductivity (EC), and temperature — giving you the complete picture of your nutrient solution in a single dip. Connect via Bluetooth to the Edenic app for real-time data, remote monitoring, and comprehensive grow management from your phone or browser.
With a replaceable double-junction pH probe, titanium EC electrodes, IP68 dust and waterproof rating, and 0.01 pH resolution, the OnePen™ is built for daily use in the most demanding growing environments.
Key Features
3-in-1 Simultaneous Measurement: Reads pH, conductivity (EC), and temperature at the same time on a bright backlit display — no switching between modes.
Bluetooth + Edenic App: Connect wirelessly to the Edenic app for real-time data sharing, remote monitoring, software updates, and measurement history management.
Replaceable Double-Junction pH Probe: Double-junction design resists contamination for longer probe life; replaceable when needed to extend meter lifespan indefinitely.
Titanium Conductivity Electrodes: Corrosion-resistant titanium EC electrodes deliver stable, accurate conductivity readings in nutrient-rich solutions.
IP68 Rated: Fully dust and waterproof — built to withstand daily submersion in nutrient solutions, runoff testing, and wet growing environments.
0.01 pH Resolution: Precise readings to 2 decimal places for confident nutrient management decisions.
Probe Health Indicator: Built-in indicator alerts you when the pH probe needs attention — no guessing, no missed calibrations.
Simple 2-Point pH Calibration: Fast, straightforward calibration keeps your readings accurate with minimal effort.
Multi-Scale EC Display: Reads conductivity in EC, mS/cm, CF, PPM 500 (TDS), or PPM 700 — compatible with all major growing scales.
Temperature in °C or °F: Switch between Celsius and Fahrenheit to suit your preference or region.
Compact Ergonomic Design: Slim, pen-format body fits comfortably in hand for easy use in reservoirs, runoff trays, and water sources.
Made in New Zealand: Bluelab’s decades of precision instrument manufacturing behind every OnePen™.
Edenic App Features
View pH, EC & temperature measurements remotely via app or browser
Real-time data updates over Bluetooth
Record, store, categorise & share measurement history
Receive software updates wirelessly
Ideal For
Hydroponics & indoor growing nutrient management
Aquaponics & aquaculture water quality monitoring
Greenhouse & commercial growing operations
Cannabis cultivation & precision nutrient control
Coco coir, NFT, DWC & recirculating systems
Runoff & water source testing
Laboratory & research applications
Technical Specifications
pH Range: 0.00–14.00 | Resolution: 0.01 pH
EC Scales: EC, mS/cm, CF, PPM 500 (TDS), PPM 700
Temperature: °C or °F
Calibration: 2-point pH calibration
Probe: Replaceable double-junction pH probe + titanium EC electrodes
Connectivity: Bluetooth (Edenic app)
IP Rating: IP68 (dust & waterproof)
Display: Backlit LCD, simultaneous pH & EC
SKU: PENONE
Barcode (UPC): 09421024923174
Country of Origin: New Zealand
Weight: 12 oz
Replacement probe: Bluelab OnePen Replacement Probe available separately.
Pro tip: Pair the Bluelab OnePen™ with Bluelab pH 4.0 and 7.0 calibration solution sachets and KCl storage solution for a complete maintenance kit — maximising probe accuracy and longevity.
Master the art of plant health with precision
Introducing the Bluelab OnePen™, the new all-in-one solution to measure pH, Conductivity (EC), and Temperature, ensuring you give your plants the nutrient balance they need.
While Electrical Conductivity (EC) indicates the total amount of nutrients in your solution, pH (potential Hydrogen) shows how acidic or alkaline your solution is, which determines nutrient absorption. Temperature affects your plants’ growth rate and structure.
By closely monitoring these vital parameters, you can optimise nutrient uptake, reducing waste and maximising plant quality and yield. Whether you’re checking hydroponic nutrient solutions, runoff, or your water source; accurate readings are just a click away.
Advanced connectivity and data management
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Unlock the full potential of data with the Edenic app.
Connect your Bluelab OnePen™ to the Edenic app via Bluetooth for real-time sharing, updates, and comprehensive data management. Record, store, categorise and share your measurements in one easy-to-use app.
Download App
Superior durability and easy maintenance
The double-junction pH probe, titanium electrodes, and IP68 dust and waterproof rating ensure durability, while the replaceable probe and health indicator simplify maintenance for long-lasting performance.
This pen’s ergonomic build and high-contrast backlit display also feature simultaneous pH and Conductivity (EC) readings for a seamless user experience. Get fast, precise readings down to 2 decimals with the Bluelab OnePen™. This reliable information empowers growers to make confident decisions, saving you time and ensuring optimal plant growth.
