--- product_id: 768058028 title: "Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L)" brand: "hanna instruments" price: "€ 4.08" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.pt/products/768058028-hanna-instruments-hi7004-1l-ph-4-01-calibration-solution-1 store_origin: PT region: Portugal --- # 5-year shelf life unopened ±0.01 pH accuracy ISO 3696/BS3978 certified purity Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L) **Brand:** hanna instruments **Price:** € 4.08 **Availability:** ❌ Out of Stock ## Summary > 🧪 Calibrate like a pro — precision that keeps you ahead of the curve! ## Quick Answers - **What is this?** Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L) by hanna instruments - **How much does it cost?** € 4.08 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/768058028-hanna-instruments-hi7004-1l-ph-4-01-calibration-solution-1) ## Best For - hanna instruments enthusiasts ## Why This Product - Trusted hanna instruments brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Lab-Grade Purity:** Formulated with high-purity salts and deionized water under strict ISO standards to guarantee consistent performance. - • **Long-Term Reliability:** Airtight, tamper-proof seal preserves solution integrity with a 5-year shelf life—calibrate now, use later. - • **Smart Calibration Aid:** Red-dyed solution and temperature chart on bottle streamline your workflow and reduce errors. - • **Precision You Can Trust:** NIST-traceable pH 4.01 calibration with ±0.01 accuracy at 25°C for flawless measurements every time. - • **Traceability & Quality Assurance:** Lot number and expiration date on label ensure full transparency and compliance for professional labs. ## Overview The Hanna Instruments HI7004/1L pH 4.01 Calibration Solution is a premium, NIST-traceable buffer designed for precise pH meter calibration. Manufactured to ISO 3696/BS3978 standards with high-purity ingredients, it offers ±0.01 pH accuracy at 25°C. Featuring a red dye for easy identification, a temperature reference chart, and a tamper-proof seal, it ensures reliable, long-lasting performance with a 5-year shelf life unopened—ideal for laboratory and industrial calibration needs. ## Description Ensure precise pH calibration with the Hanna Instruments HI7004/1L pH 4.01 Calibration Solution. This premium-quality buffer is formulated in compliance with ISO 3696/BS3978 standards, using high-purity salts, deionized water, and certified Class A glassware. Designed for laboratory and industrial applications, this NIST-traceable solution provides an accuracy of ±0.01 pH @ 25°C and features a temperature chart for reference at different temperatures. The red-dyed solution allows for easy buffer identification, while the airtight, tamper-proof seal ensures long-term reliability with a 5-year shelf life for unopened bottles. Key Features: ✔ High Accuracy & NIST Traceable – pH 4.01 buffer solution with ±0.01 pH accuracy @ 25°C, ensuring reliable calibration results. ✔ Premium Quality Standards – Manufactured in accordance with ISO 3696/BS3978 using high-purity salts and deionized water. ✔ Long Shelf Life – Specially formulated with a 5-year expiration date for unopened bottles, ensuring long-term usability. ✔ Tamper-Proof & Airtight Seal – Ensures freshness and quality of the buffer solution. ✔ Temperature Chart on Bottle – Provides actual pH values at various temperatures for precise calibration. ✔ Red-Dyed for Easy Identification – Quickly recognize the buffer solution in your calibration routine. ✔ Lot Number & Expiration Date on Label – Guarantees product traceability and quality assurance. Review: Helps calibrate the PH level because the machine I ordered wasn’t working after using this it was good, and price worthy Review: I have used Hanna calibration buffer solutions for years with no problems. ## Features - Laboratory use - Industrial calibration applications - pH meters and electrodes calibration - Research and scientific testing - HI7004/1L pH 4.01 Calibration Solution ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00RYPG6XE | | Item model number | HI7004/1L | | Manufacturer | Hanna Instruments | | Package Dimensions | 19.81 x 7.19 x 7.11 cm; 590 g | ## Images ![Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L) - Image 1](https://m.media-amazon.com/images/I/41PgPFl0ZOL.jpg) ![Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L) - Image 2](https://m.media-amazon.com/images/I/81SkaEo9SpL.jpg) ## Questions & Answers **Q: Is it normal for the ph of the buffer to change over time? My teika ph meter read 4.01 one day, 4.17 the next, and 4.27 the next.** A: I have the same problem and have not figured it out yet, even with a new meter. Sorry I couldn't be more help ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***L on 23 June 2025* Helps calibrate the PH level because the machine I ordered wasn’t working after using this it was good, and price worthy ### ⭐⭐⭐⭐⭐ Review *by R***S on 27 March 2020* I have used Hanna calibration buffer solutions for years with no problems. ### ⭐⭐⭐⭐⭐ Review *by J***N on 2 December 2016* Works well it's reliable has a long shelf life. I've been using Hanna calibration solutions for years now and I have nothing but good to say and report about it ## Frequently Bought Together - Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle - WLR Industries Hanna HI7007L pH 7 Buffer Solution - pH 7.01 - Hanna Instruments HI70300L pH/ORP Electrode Storage Solution, 500mL (16.9oz) Bottle --- ## 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.pt/products/768058028-hanna-instruments-hi7004-1l-ph-4-01-calibration-solution-1](https://www.desertcart.pt/products/768058028-hanna-instruments-hi7004-1l-ph-4-01-calibration-solution-1) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-24*