--- product_id: 62104659 title: "ORP Oxidation-Reduction Potential 256mV Calibration Solution 50ml" brand: "gain express" price: "£21.19" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/62104659-orp-oxidation-reduction-potential-256mv-calibration-solution-50ml store_origin: GB region: United Kingdom --- # Long-lasting 50ml volume Professional-grade accuracy Precise 256mV calibration ORP Oxidation-Reduction Potential 256mV Calibration Solution 50ml **Brand:** gain express **Price:** £21.19 **Availability:** ✅ In Stock ## Summary > ⚡ Stay ahead with precision—because your readings deserve the best! ## Quick Answers - **What is this?** ORP Oxidation-Reduction Potential 256mV Calibration Solution 50ml by gain express - **How much does it cost?** £21.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/62104659-orp-oxidation-reduction-potential-256mv-calibration-solution-50ml) ## Best For - gain express enthusiasts ## Why This Product - Trusted gain express brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Perfected:** Calibrate your ORP meter with exact 256mV solution for flawless readings every time. - • **Endurance in a Bottle:** Generous 50ml supply ensures multiple calibrations, saving you time and cost. - • **Pro-Level Reliability:** Meets CE, ISO 9001, and RoHS standards for trusted, industry-grade performance. - • **Effortless Calibration:** Quick, hassle-free application—just a few drops to optimize your device instantly. - • **Optimize Device Lifespan:** Regular calibration maintains peak meter functionality and consistent results. ## Overview The ORP Oxidation-Reduction Potential 256mV Calibration Solution (50ml) by Gain Express Holdings Ltd is a professional-grade liquid designed to ensure precise calibration of digital ORP meters. Compliant with CE, ISO 9001, and RoHS standards, this 50ml solution offers long-lasting use and easy application, optimizing your device’s accuracy and reliability for consistent, trustworthy measurements. ## Description This optional 256mv calibration solution 50ml is used for Digital Redox Meter -1999mV~1999mV Millivolts Pool Aquarium Oxidation Reduction Potential (ORP) Tester (ORP-002) ## Features - PRECISE CALIBRATION: Ensure accurate measurements with our ORP Oxidation-Reduction Potential REDOX 256mV Calibration Solution 50ml. - ENHANCED PERFORMANCE: Optimize your device's functionality and maintain reliable results with regular calibration using our solution. - PROFESSIONAL GRADE: Designed for professional use, our calibration solution meets industry standards for accuracy and consistency. - EASY TO USE: Simply apply a few drops of our calibration solution to your ORP meter for quick and hassle-free calibration. - LONG-LASTING SUPPLY: With a generous 50ml volume, our solution provides ample calibration sessions, saving you time and money. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Gain Express Holdings Ltd | | Part number | SOL-ORP-256MV | | Item Weight | 100 g | | Package Dimensions | 9.6 x 9.4 x 5.3 cm; 100 g | | Item model number | SOL-ORP-256MV | | Colour | 256mv calibration solution | | Power source type | Corded Electric | | Item Package Quantity | 1 | | Specification met | CE, EN 61010-1, IEC 61010-1:2000-1, ISO 9001, RoHS | | Batteries included? | No | | Batteries Required? | No | ## Product Details - **Brand:** GAIN EXPRESS - **Power source:** Corded Electric - **Colour:** 256mv calibration solution - **Specification met:** CE, EN 61010-1, IEC 61010-1:2000-1, ISO 9001, RoHS - **UPC:** 600316559423 ## Images ![ORP Oxidation-Reduction Potential 256mV Calibration Solution 50ml - Image 1](https://m.media-amazon.com/images/I/61zDk9e-xkL.jpg) ## Questions & Answers **Q: where to get potassium chloride solution to activate orp? is it nessery step befor caliberation?** A: Amazon has 3M KCl and ORP standards. I didn't activate mine with KCl and it is working just fine. I calibrated it with a 260 MV standard. I hope I am somewhat helpful. **Q: How do you dispose of the calibration solution after use?** A: Hi, the solution is non-corrosive, you can simply dispose of it normally. **Q: can i use boiling water instead of distilled water?** A: Boiling water is not the same as distilled water, if you capture the steam then cool it and convert it back to water then it would become distilled otherwise boiling water is very high in chlorides and tds ## Frequently Bought Together - ORP Oxidation-Reduction Potential REDOX 256mV Calibration Solution 50ml - Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 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.co.uk/products/62104659-orp-oxidation-reduction-potential-256mv-calibration-solution-50ml](https://www.desertcart.co.uk/products/62104659-orp-oxidation-reduction-potential-256mv-calibration-solution-50ml) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*