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

Hi7004 1l Ph 4 01 Calibration Solution 1 L

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Description

🧪 Calibrate like a pro — precision that keeps you ahead of the curve!

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.

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.

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S/.254

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In stock

Sold byAmazon PeruDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Peru.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

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ASIN	B00RYPG6XE
Item model number	HI7004/1L
Manufacturer	Hanna Instruments
Package Dimensions	19.81 x 7.19 x 7.11 cm; 590 g

HI7004/1L pH 4.01 Calibration Solution (1 L)

Description

Specifications

Common Questions