---
product_id: 768058028
title: "Hanna Instruments HI7004/1L pH 4.01 Calibration Solution (1 L)"
brand: "hanna instruments"
price: "$25.26"
currency: USD
in_stock: false
reviews_count: 5
url: https://www.desertcart.ec/products/768058028-hanna-instruments-hi7004-1l-ph-4-01-calibration-solution-1
store_origin: EC
region: Ecuador
---

# 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:** $25.26
**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?** $25.26 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/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

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-26*