---
product_id: 74012676
title: "Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each"
brand: "bluelab"
price: "€ 117.00"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77
store_origin: ES
region: Spain
---

# Accurate EC conductivity at 2.77 Precise pH calibration at 4.0 & 7.0 500 ml each for long-lasting use Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each

**Brand:** bluelab
**Price:** € 117.00
**Availability:** ✅ In Stock

## Summary

> 🧪 Stay sharp, stay accurate – calibrate like a pro!

## 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?** € 117.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/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

- • **Extended Usage:** Generous 500 ml bottles provide long-term calibration without frequent replacements.
- • **Precision Perfected:** Calibrate your probes with industry-standard pH 4.0 & 7.0 solutions for unmatched accuracy.
- • **Conductivity Confidence:** Maintain flawless EC readings with the 2.77 conductivity solution included.
- • **Complete Calibration Kit:** All-in-one 3-solution set ensures your probes stay clean and reliable.
- • **Professional Grade Assurance:** Trusted by experts to deliver consistent, lab-quality results every time.

## Overview

This comprehensive calibration kit includes 500 ml bottles of pH 4.0 and 7.0 solutions plus a 2.77 EC conductivity solution, designed to keep your pH and conductivity probes clean, precise, and reliable for professional-grade measurements.

## Description

Calibration Solution pH 4.0, 7.0 and 2.77 EC Conductivity Solution, 500 ml Each

## Features

- This kit contains everything needed to keep your pH and conductivity probes clean and accurate.

## Product Details

- **Brand:** Bluelab
- **Item Volume:** 500 Milliliters
- **Package Information:** Bottle
- **Item Form:** Liquid
- **Manufacturer:** Bluelab

## 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

## 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

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**Shop now:** [https://www.desertcart.es/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77](https://www.desertcart.es/products/74012676-calibration-solution-ph-4-0-7-0-and-2-77)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-23*