RPI Traceable Ph Buffer Standards, 4.

RPI Traceable pH Buffer Standards, 4.005 pH Value, 6 Single Use 100ml Containers; Traceable pH Buffers provide the most precise accuracy available, ± 0.010 pH @ 25°C. These buffers have a Certified Reference Materials Classification and meet all Federal, State and local requirements to provide exact calibration results with all pH meters. Each buffer is supplied with an individual and serialized Traceable Certificate of Calibration. Convenient 100ml single use containers eliminate the need for long term storage. - RPI