--- product_id: 710376454 title: "OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe" brand: "bluelab" price: "€ 481.15" currency: EUR in_stock: true category: "Bluelab" url: https://www.desertcart.hr/products/710376454-onepen-a-3-in-1-temperature-ec-ppm-and-ph store_origin: HR region: Croatia --- # Fastest stable pH & EC reading IP68 waterproof & floating design Bluetooth data sync & app tracking OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe **Brand:** bluelab **Price:** € 481.15 **Availability:** ✅ In Stock ## Summary > 🌱 Grow smarter, not harder — precision meets innovation with Bluelab OnePen! ## Quick Answers - **What is this?** OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe by bluelab - **How much does it cost?** € 481.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/710376454-onepen-a-3-in-1-temperature-ec-ppm-and-ph) ## Best For - bluelab enthusiasts ## Why This Product - Trusted bluelab brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Smart Sync:** Bluetooth connectivity pairs effortlessly with the Edenic app for real-time data logging and trend tracking. - • **Ergonomic & Professional:** Luxurious, durable design with a high-contrast screen and handy cap that doubles as a suspension system for hands-free testing. - • **Lightning-Fast Precision:** Get stable pH and EC readings in seconds with ±0.01 accuracy—no more waiting, no more guesswork. - • **Built to Brave the Elements:** IP68-rated waterproof and dustproof design that floats—perfect for any grow environment, indoors or out. - • **Effortless Probe Maintenance:** Replaceable double-junction pH probe with titanium electrodes and built-in health sensor ensures longevity and reliability. ## Overview The Bluelab OnePen is a professional-grade 3-in-1 meter delivering ultra-fast, highly accurate pH, EC/PPM, and temperature readings. Featuring IP68 waterproofing, Bluetooth connectivity for seamless data management via the Edenic app, and a replaceable probe with health monitoring, it’s engineered for serious growers who demand precision and convenience. Ready to use out of the box with included calibration solutions and batteries, it’s the ultimate tool to optimize your growing environment with confidence. ## Description The Bluelab OnePen simplifies plant care by providing reliable measurements of pH, Conductivity (EC/PPM), and Temperature. Bluetooth connectivity allows for simple data management with our Edenic app, making it easier to monitor and optimize your growing environment. Our app’s comprehensive data management features allow you to log and analyze your readings effectively.​​ The OnePen is fast, very fast, and will allow you to speed up your testing tasks, giving you more time to focus on the rest of your operation. Our advanced sensor technology ensures accurate readings, whether you’re growing in hydroponics, traditional soil, or other horticultural setups. With precision down to two decimals for pH and EC, you can confidently manage your nutrient solutions.​​ We’ve also incorporated a probe health sensor to reduce harming plants with inaccurate readings. Probes naturally go bad, and our built-in health indicator will tell you when to change your probe. Swapping out replacement probes is simple and economical.​ Everything you need is included. The OnePen box comes with calibration solutions, a sensor cleaning brush, and batteries - it's ready for use right out of the box.​​ Bluelab has been the professional grower’s choice for 30 years. We’re based in New Zealand, where we manufacture all our devices. ## Features - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DF71QDNJ | | Best Sellers Rank | 27,150 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 51 in Lab pH Meters | | Brand | Bluelab | | Country Of Origin | New Zealand | | Customer Reviews | 3.8 3.8 out of 5 stars (73) | | Included Components | Bluelab OnePen, 18ml Solution Sachets, Sensor Cleaning Brush, 2x AAA Batteries | | Item Dimensions | 8 x 7 x 20 centimetres | | Item Weight | 0.32 Kilograms | | Manufacturer | bluelab | | Manufacturer Part Number | PENONE | | Model Number | ONEPEN | | Smart Home Compatibility | Not Smart Home Compatible | | Unit Count | 1.0 count | ## Product Details - **Brand:** Bluelab - **Item dimensions L x W x H:** 8 x 7 x 20 centimetres - **Item weight:** 0.32 Kilograms - **Number of items:** 1 - **Unit count:** 1.0 count ## Images ![OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe - Image 1](https://m.media-amazon.com/images/I/71mS3qNvmoL.jpg) ## Questions & Answers **Q: Why should I choose the Bluelab OnePen over other combination pH and conductivity pens?** A: Simply put, the Bluelab OnePen is the most advanced all-in-one pH & conductivity pen on the market. Getting to a stable reading is lightning fast, and it connects to the Bluelab Edenic app for historic tracking of your pH & conductivity readings. **Q: What is the Edenic app? Why should I care?** A: Edenic is our mobile app that seamlessly captures your critical hydroponic data directly from your Bluelab device. Individual growers can now ditch the pen & paper when tracking a grow. Larger commercial operations can manage all grow data centrally. **Q: I run a large commercial growing operation. What else should I know about Edenic?** A: For you, Edenic is a game changer. It provides a complete solution for managing your growing environment from on-site or afar. Consolidate data from multiple meters, set alarms for high & low readings, and record all historical data in one place. **Q: Can I see pH and conductivity readings simultaneously?** A: Yes! The backlit screen shows pH & conductivity at the same time, unlike other pens that make you rotate different screens to see readings. The OnePen is packed with thoughtful touches like this, drawn from our own 30+ years of growing experience. **Q: I sometimes see a white crust built up on the end of the pen. What is this?** A: This is very common in pH meters & is nothing to worry about. The storage solution used to hydrate your pen (and extend its longevity) is potassium salt, which sometimes dries as a white crust on your probe. Simply rinse this away under water. ## Frequently Bought Together - Bluelab OnePen - a 3-in-1 Temperature, EC/PPM and pH Meter, Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe - Bluelab STSOL120 KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White - Bluelab pH 4.0 & 7.0 Calibration Solution Kit - pH Meter & pH Pen Calibration for Balanced Nutrient Solution NIST Traceable | Hydroponics, Gardening & Growing Tents (500 ml/ 16.9 Fl Oz Each) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/710376454-onepen-a-3-in-1-temperature-ec-ppm-and-ph](https://www.desertcart.hr/products/710376454-onepen-a-3-in-1-temperature-ec-ppm-and-ph) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-15*