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. Made in New Zealand by Bluelab — decades of precision instrument manufacturing behind every unit.
Key Features
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3-in-1 Simultaneous Measurement — reads pH, EC, and temperature at the same time on a bright backlit display; no mode switching
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Bluetooth + Edenic App — real-time data sharing, remote monitoring, software updates, and measurement history from your phone or browser
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Replaceable Double-Junction pH Probe — resists contamination for longer probe life; replaceable to extend meter lifespan indefinitely
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Titanium EC Electrodes — corrosion-resistant for stable, accurate conductivity readings in nutrient-rich solutions
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IP68 Rated — fully dust and waterproof; built for daily submersion in nutrient solutions and wet growing environments
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0.01 pH Resolution — precise readings to 2 decimal places for confident nutrient management
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Probe Health Indicator — alerts you when the pH probe needs attention; no missed calibrations
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Simple 2-Point pH Calibration — fast and straightforward to keep readings accurate
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Multi-Scale EC Display — reads in EC, mS/cm, CF, PPM 500 (TDS), or PPM 700; compatible with all major growing scales
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Temperature in °C or °F — switch between Celsius and Fahrenheit to suit your region
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Compact Ergonomic Pen Design — slim body fits comfortably in hand for easy use in reservoirs, runoff trays, and water sources
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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
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SKU: PENONE
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pH Range: 0.00–14.00 | Resolution: 0.01 pH
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EC Scales: EC, mS/cm, CF, PPM 500 (TDS), PPM 700
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Temperature: °C or °F
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Calibration: 2-point pH calibration
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Probe: Replaceable double-junction pH probe + titanium EC electrodes
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Connectivity: Bluetooth (Edenic app)
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IP Rating: IP68 (dust & waterproof)
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Display: Backlit LCD, simultaneous pH & EC
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Country of Origin: New Zealand
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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.
