--- product_id: 64572303 title: "Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow" brand: "bluelab" price: "€ 243.68" currency: EUR in_stock: true reviews_count: 7 url: https://www.desertcart.hr/products/64572303-bluelab-pencon-conductivity-pen-and-digital-tds-meter-water-tester store_origin: HR region: Croatia --- # Multi-Unit Readings (EC, CF, PPM 500/700) Fully Waterproof & Floats Auto Temperature Compensation (ATC) Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow **Brand:** bluelab **Price:** € 243.68 **Availability:** ✅ In Stock ## Summary > 🌿 Grow Smarter, Not Harder — The Ultimate Nutrient Guardian ## Quick Answers - **What is this?** Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow by bluelab - **How much does it cost?** € 243.68 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/64572303-bluelab-pencon-conductivity-pen-and-digital-tds-meter-water-tester) ## 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 - • **Ready Out-of-the-Box:** Factory calibrated and battery included—start optimizing your grow immediately without hassle. - • **Built to Endure & Float:** Rugged, waterproof design that floats in any solution, ready for repeated use in any environment. - • **Versatile Multi-Unit Display:** Switch effortlessly between EC, CF, PPM 500, and PPM 700 units to suit your specific hydroponic or water testing needs. - • **Precision Nutrient Monitoring:** Ensure your plants get perfectly balanced feed every time with instant TDS and conductivity readings. - • **Temperature-Resilient Accuracy:** ATC technology guarantees consistent results regardless of temperature fluctuations—no guesswork needed. ## Overview The Bluelab PENCON Conductivity Pen is a professional-grade, waterproof TDS and conductivity meter designed for hydroponic growers and indoor plant enthusiasts. Featuring Auto Temperature Compensation, multi-unit measurement options, and a durable floating design, it delivers precise nutrient and water quality readings to maximize plant health. Factory calibrated and ready to use with included AAA battery, it’s a trusted tool from New Zealand’s leading hydroponic equipment manufacturer, backed by a 2-year warranty. ## Description The ultimate solution for measuring conductivity!The Bluelab Conductivity Pen is the latest innovation for hand held conductivity meters. It provides a compact, quick and handy way to manage the success of your crops.The Bluelab Conductivity Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. Display options available in °C, °F, EC, CF, ppm 500 and ppm 700. Review: Blue lab EC pen - Brilliant device Review: NOT NEW - Not new, same price as new one. ## Features - Conductivity pen can test and monitor your nutrients (TDS) level to maximize your grow and ensure plants get the balanced feed they need; General uses include growing tent, swimming pool, drinking water, aquarium, fish tank, and brewing - This hydroponics tester has ATC that provides consistent reading regardless of any fluctuations in temperature; Durable design for repeated uses and fully waterproof and it floats in any solution - Calibration optional, the meter comes factory calibrated so it's ready to be used; Regular cleaning is recommended for accurate reading; Different units are available (EC, PPM 500, PPM700, and CF) - Combine with our pH pens and meters for full garden nutrient monitoring in water and soil; Other features: Auto off function, low battery indicator, units for temperature; KIT INCLUDES: AAA battery, probe care kit is sold separately - Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for grower; 2-Year Limited Warranty with proof of purchase ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005IGXOK4 | | Best Sellers Rank | 147,647 in Garden ( See Top 100 in Garden ) 390 in Pool & Hot Tub Testers | | Brand | Bluelab | | Colour | White | | Country Of Origin | New Zealand | | Customer Reviews | 4.5 4.5 out of 5 stars (1,064) | | Global Trade Identification Number | 09421024920227 | | Included Components | Batteries included | | Item Type Name | TDS Testing Kit for Hydroponic System and Indoor Plant Grow | | Item Weight | 0.24 Pounds | | Manufacturer | Bluelab Corporation Limited - Import (NZ) | | Manufacturer Part Number | BLU2221 | | Model Name | Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), | | Model Number | PENCON | | Number of Batteries | 1 AAA batteries required. (included) | | Power Source | Aaa Batteries | | Product Warranty | One year free repair or replacement guarantee | | Style Name | Conductivity Pen | ## Product Details - **Brand:** Bluelab - **Colour:** White - **Global Trade Identification Number:** 09421024920227 - **Included components:** Batteries included - **Manufacturer:** Bluelab Corporation Limited - Import (NZ) - **Number of batteries:** 1 AAA batteries required. (included) - **Power source:** Aaa Batteries - **Style:** Conductivity Pen ## Images ![Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - Image 1](https://m.media-amazon.com/images/I/71csSQrRF9L.jpg) ![Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - Image 2](https://m.media-amazon.com/images/I/71D1ZtfMaxL.jpg) ![Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - Image 3](https://m.media-amazon.com/images/I/81mGMfn5AyL.jpg) ![Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - Image 4](https://m.media-amazon.com/images/I/7160WNVpf7L.jpg) ![Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - Image 5](https://m.media-amazon.com/images/I/81uXTbqZwXL.jpg) ## Questions & Answers **Q: Does this pen really have to be calibrated?** A: These are great pens for the hobbyist just remember when you do not see the check mark on your pH pen or on your PPM EC conductivity bluelab pen it is time to calibrate if you do not see this check mark displayed on either pin on the screen calibrate. I also recommend using the 7.0 bluelab calibration solution followed up by the 4.0 bluelab calibration solution to get a more accurate reading of the pH solution. Also use blue lab calibration solution for your conductivity meter as well these meters will last a very long time I had mine for almost 4 years and still in good shape keep your meters clean keep your pH bulb moist in store in the pH storage solution that is made by blue lab. Never let the bulb go dry if you do it will take 24 hours or it is good to give 24 hours to rehydrate your pH bulb. And if I'm not mistaken on the bottles the calibration solution of either your conductivity meter solution for calibration or your pH pen calibration solution it says on the bottle after opening don't use after three months I don't know if this matters a whole lot or not but I've used my solution over three months plenty of time and no noticeable difference in this. I guess the main thing is to keep your pH pen glass bulb hydrated I believe that this is probably the most important thing when owning a blue lab pH testing pin. If there is anyone to add to this conversation or to give me any advice that's positive please do so I am always willing to learn and listen so please if anyone has any experience with these pins other than me and something that I may not have mentioned or know please tell me or leave a review thank you I hope this has been helpful. And please stay positive with positive feedback just remember people there are no stupid questions and no mistakes only lessons thank you. **Q: What is ec have to do with my indoor medical grown cannabis plant?** A: The EC is an indirect measure of the fertilizer salts contained in the substrate, so those target levels will also vary at different growth stages. By starting an in-house nutrient monitoring program and measuring the EC, you can make sure that sufficient levels of fertilizer are available to the plants. **Q: Mine wont read tap water, right out of the box. Is it defective?** A: Sure **Q: Description is contradictory - is this pen ec, ppm (500 & 700), ph and temperature? seller confirm please** A: No ph ## Customer Reviews ### ⭐⭐⭐⭐⭐ Blue lab EC pen *by S***N on 24 November 2022* Brilliant device ### ⭐ NOT NEW *by J***N on 26 June 2019* Not new, same price as new one. ### ⭐⭐⭐⭐⭐ Du lourd *by L***R on 14 February 2021* Top du top ## Frequently Bought Together - Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow - bluelab pH Pen - ± 0.1 pH Accurate, Durable Double Junction Probe, Waterproof & Floats, Auto Temperature Compensation, Easy Calibration - Made in NZ - Bluelab STSOL120 KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White --- ## 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/64572303-bluelab-pencon-conductivity-pen-and-digital-tds-meter-water-tester](https://www.desertcart.hr/products/64572303-bluelab-pencon-conductivity-pen-and-digital-tds-meter-water-tester) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-21*