--- product_id: 74012676 title: "Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each" brand: "bluelab" price: "487.41 DT" currency: TND in_stock: true reviews_count: 13 category: "Bluelab" url: https://www.desertcart.tn/products/74012676-bluelab-calibration-solution-ph-4-0-7-0-and-2 store_origin: TN region: Tunisia --- # ensures accurate pH & EC readings 500 ml bottles for multiple uses 3 precise calibration solutions Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each **Brand:** bluelab **Price:** 487.41 DT **Availability:** ✅ In Stock ## Summary > ⚡ Calibrate like a pro, grow like a boss! ## Quick Answers - **What is this?** Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each by bluelab - **How much does it cost?** 487.41 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/74012676-bluelab-calibration-solution-ph-4-0-7-0-and-2) ## 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 - • **Long-Lasting Supply:** 500 ml bottles designed for routine, hassle-free maintenance - • **Reliable Growth Insights:** Eliminate guesswork with precise nutrient and water quality data - • **Triple-Check Calibration:** pH 4.0, 7.0 & 2.77 EC solutions for full-spectrum meter accuracy - • **Confidence After Cleaning:** Verify probe performance instantly to keep your meters flawless - • **Time-Saving Pre-Mixed Formula:** Ready-to-use solutions cut calibration time and errors ## Overview Bluelab Calibration Solution set includes pH 4.0, 7.0, and 2.77 EC conductivity liquids in 500 ml bottles, designed to ensure your pH and EC meters deliver consistent, reliable readings. Perfect for hydroponics and nutrient management, these pre-mixed solutions save time and reduce errors, helping you maintain optimal plant health with confidence. ## Description Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each: desertcart.com: Industrial & Scientific Review: Gotta have it. - If your using a ph meter or dissolved solids meter this is a must have. Not cheap but accurate. If you want your grow to turn out right you need accurate info on your water ph and fertilizer strength. Don’t think you can compromise here. Not cheap but reliable. Review: Calibration fluids - Exactly what I expected ## Features - Includes pH 4.0, pH 7.0, and 2.77 EC conductivity solutions to fully calibrate and verify your pH and EC/PPM meters for consistent, reliable measurements - Regular calibration helps eliminate inaccurate readings that can impact plant health, nutrient balance, and water quality in hydroponics - Designed to confirm probe performance after cleaning, ensuring your meters are functioning correctly and delivering dependable results every time - Pre-mixed calibration solutions save time and reduce errors—simply pour and test for quick, hassle-free calibration - Each solution comes in a 500 ml bottle, ideal for routine maintenance, long-term use, and multiple calibrations ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07BRBJD77 | | Best Sellers Rank | #141,781 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #37 in Electrolyte Solutions | | Brand | Bluelab | | Brand Name | Bluelab | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 336 Reviews | | Included Components | 1 Bluelab pH 4.0 Calibration Solution | | Item Form | Liquid | | Item Volume | 500 Milliliters | | Manufacturer | Bluelab | | Package Information | Bottle | | Part Number | BSL47C50AT | | UPC | 680666717124 | | Unit Count | 50.7 Fluid Ounces | | Volume | 500 Milliliters | ## Product Details - **Brand:** Bluelab - **Item Form:** Liquid - **Item Volume:** 500 Milliliters - **Manufacturer:** Bluelab - **Package Information:** Bottle ## Images ![Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - Image 1](https://m.media-amazon.com/images/I/717uGQpRECL.jpg) ![Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - Image 2](https://m.media-amazon.com/images/I/81mNcCW-ndL.jpg) ![Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - Image 3](https://m.media-amazon.com/images/I/7190L19cS-L.jpg) ![Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - Image 4](https://m.media-amazon.com/images/I/71DiBNtO00L.jpg) ![Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - Image 5](https://m.media-amazon.com/images/I/71HHSv1LbGL.jpg) ## Questions & Answers **Q: What is the difference between kcl storage solution and 2.77 ec conductivity standard solution?? both of them contain kcl and water..** A: It is actually 27.7 the description is a typo. Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each. Look at the label on the bottle. **Q: How long does the 7.0 and 4.0 solutions last once opened? I assume you pour out a little each time you calibrate. Is 70 F a good temp to store it?** A: I have had mine since February and I keep it under the sink in about70°. It seems to be just fine I also reuse my calibration solution as I am careful not to contaminate it ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gotta have it. *by M***S on October 30, 2022* If your using a ph meter or dissolved solids meter this is a must have. Not cheap but accurate. If you want your grow to turn out right you need accurate info on your water ph and fertilizer strength. Don’t think you can compromise here. Not cheap but reliable. ### ⭐⭐⭐⭐⭐ Calibration fluids *by T***R on April 8, 2024* Exactly what I expected ### ⭐⭐⭐⭐⭐ Lighting fast shipping! *by E***5 on January 18, 2021* Exactly as described sealed bottles and Very fast shipping! Couldn't be more satisfied with purchase. ## Frequently Bought Together - Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each - 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.tn/products/74012676-bluelab-calibration-solution-ph-4-0-7-0-and-2](https://www.desertcart.tn/products/74012676-bluelab-calibration-solution-ph-4-0-7-0-and-2) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-10*