Biopharm pH Calibration Kit (2) 500 ml (16oz) Bottles pH 7.0 Buffer and Electrode Storage Solution NIST Traceable Reference Standard for All pH Meters

This buffer pH 7 calibration solution is suitable for the calibration of all pH meters. Each production lot is manufactured in our USA laboratory following carefully controlled written procedures and standardized against NIST standard reference materials (SRM) for highest accuracy. The finished product is assigned a unique Lot number and expiration date. This product will have greater than one year shelf life when received. The electrode storage solution will help keep the pH electrode clean and protected and does not need an expiration date.