HANNA INSTRUMENTS pH 4.01 Buffer Solution, 25 x 20ml Sachets

The HANNA INSTRUMENTS HI-70004P is a premium quality pH 4.01 calibration buffer solution, essential for ensuring the accuracy and reliability of pH meters. Each pack contains 25 individual, sealed sachets, each holding 20mL of precisely formulated buffer. This convenient, single-use format guarantees fresh, uncontaminated buffer for every calibration, minimising the risk of error and extending the life of your equipment.

Produced in strict accordance with ISO 3696 and BS3978 standards, this buffer solution is manufactured using high-purity salts, deionised water, certified weight-checked balances, and Class A glassware within a meticulously temperature-controlled environment. This rigorous process ensures exceptional consistency and traceability, with reported values accurate to ±0.01 pH at 25°C and traceable to NIST Standard Reference Materials (SRMs).

Key Features & Benefits:

• Long Shelf Life & Stability: Specially formulated to remain stable for 5 years from the date of manufacture when the sachet remains unopened. Light-block packaging protects the contents from UV light oxidation, which could otherwise alter the critical buffer value.
• Enhanced Traceability & Safety: Each sachet is individually stamped with the unique lot number and expiration date, providing full traceability and ensuring you use only fresh, effective solution.
• User-Friendly Design: A colour-coded label allows for instant visual identification of the pH buffer value. Each sachet also features a printed temperature chart showing the actual pH value across various temperatures, enabling precise temperature-compensated calibration.
• Ideal for Infrequent Use & Field Applications: The portable, sealed sachets are perfect for users who do not calibrate frequently, as well as for fieldwork. They eliminate the need to carry and decant from large, unstable bottles, offering convenience and guaranteed freshness on thego