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.

I have the same problem and have not figured it out yet, even with a new meter. Sorry I couldn't be more help

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Warehouse # 7, 4th Street, Umm Ramool, Dubai, 30183, Dubai

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Hanna Instruments HI7004L 4.01 pH Calibration Buffer Solution, 500mL Bottle

Product ID: 13710562

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🧪500mL lab-grade buffer solution

⏱️Stable calibration for consistent readings

⚖️Precise 4.01 pH calibration

Description

⚖️ Calibrate with confidence, measure with precision!

LAB GRADE PRECISION - Ensure your pH meter reads flawlessly every time with the exact 4.01 pH standard.
CONSISTENT STABILITY - Maintains stable pH levels to guarantee accurate and repeatable calibration results.
GENEROUS 500 M L VOLUME - Ample solution to support multiple calibrations without frequent repurchases.
TRUSTED BRAND RELIABILITY - Hanna Instruments’ proven quality trusted by professionals worldwide.
COST EFFECTIVE CALIBRATION - Premium performance at a price that keeps your lab budget happy.

The Hanna Instruments HI7004L is a 500mL 4.01 pH calibration buffer solution designed to deliver precise and stable calibration for pH meters, ensuring accurate measurements essential for professional and laboratory use.

Specifications

Customer Reviews

4.5 out of 5 stars 67 Reviews

Reviews

S**L

Should get if you need to calibrate ph machine reader

Helps calibrate the PH level because the machine I ordered wasn’t working after using this it was good, and price worthy

23.06.2025

R**S

Great product

I have used Hanna calibration buffer solutions for years with no problems.

27.03.2020

J**N

good ole' reliable

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

2.12.2016

F**A

Excellent ,,, meets my expectations

25.08.2020

A**R

Five Stars

Good product, would buy again. Make sure you get the 7.1 buffer for a two point calibration.

23.08.2017

J**N

Just as advertised

1.07.2018

D**O

Great

30.04.2024

G**N

Four Stars

Great!!!!

25.02.2017

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