--- product_id: 74012676 title: "Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each" brand: "bluelab" price: "NZ$168" currency: NZD in_stock: true reviews_count: 13 url: https://www.desertcart.nz/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77 store_origin: NZ region: New Zealand --- # Reliable conductivity standard 500 ml volume per solution Precise pH calibration Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each **Brand:** bluelab **Price:** NZ$168 **Availability:** ✅ In Stock ## Summary > 🔬 Stay calibrated, stay ahead — precision that powers your growth! ## Quick Answers - **What is this?** Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each by bluelab - **How much does it cost?** NZ$168 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77) ## 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 - • **Trusted by Pros:** Top-rated with 4.7 stars and a must-have for serious growers and lab technicians alike. - • **Optimize Your Grow:** Accurate water and fertilizer readings mean healthier plants and higher yields. - • **Conductivity Confidence:** 2.77 EC solution ensures your probes measure nutrient strength with pinpoint accuracy. - • **Precision You Can Trust:** Calibrate pH meters at exact 4.0 & 7.0 points for flawless readings. - • **Complete Calibration Kit:** Includes all three essential solutions in convenient 500 ml bottles—no guesswork needed. ## Overview Bluelab Calibration Solution kit includes 500 ml bottles of pH 4.0, pH 7.0, and 2.77 EC conductivity solutions designed to maintain the accuracy and reliability of your pH and conductivity probes. Trusted by professionals, this kit ensures precise monitoring of water and nutrient levels critical for optimal plant health and scientific measurements. ## Description Bluelab Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each: desertcart.com: Industrial & Scientific Review: Calibration fluids - Exactly what I expected 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. ## 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 | #102,632 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #26 in Electrolyte Solutions | | Brand Name | Bluelab | | Container Type | Bottle | | Customer Reviews | 4.8 4.8 out of 5 stars (335) | | Included Components | 1 Bluelab pH 4.0 Calibration Solution | | Item Form | Liquid | | Manufacturer | Bluelab | | 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 ![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) ## 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 ### ⭐⭐⭐⭐⭐ Calibration fluids *by T***R on April 8, 2024* Exactly what I expected ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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.nz/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77](https://www.desertcart.nz/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-04-27*