Oakton Traceable® pH Standard Buffer with Calibration, Yellow, pH 7; 1000 mL

Certified Reference Materials (CRM) meet federal, state, and local requirements, providing standardized reference calibration for pH meters. Produced in compliance with A2LA ISO/IEC 17025:2005, ISO Guide 34, ISO 31, and ISO 35, CRMs ensure top-tier accuracy, documentation, and standards. They undergo extensive stability, transportation, and repeatability testing, with uncertainty (U) assigned from these evaluations. Calibration reports are issued by an ISO 17034 and ISO 17025 accredited lab. Environmental Express Oakton monitors the solution over 1 to 2 years and informs users of any changes.