Our calibration solutions are standardized against NIST-certified pH references within 0.01 pH at 77°F (25°C). Each solution is freshness dated, labeled with a pH vs. temperature table for accurate calibration (500ml bottles), and supplied with an MSDS (Material Safety Data Sheet).

Starter Kit includes 4 small bottles (60ml), one each of pH 4,7 and 10 buffers as well as 1 bottle of Electrode Storage Solution
10.00 Buffer is a 500ml bottle of calibration buffer with the pH of 10.00
7.00 Buffer is a 500ml bottle of calibration buffer with the pH of 7.00
4.00 Buffer is a 500ml bottle of calibration buffer with the pH of 4.00
Electrode Cleaning is a 500ml bottle of electrode cleansing solution
Electrode Storage is a 500ml bottle of electrode storage solution

60 ml Starter Kit Assortment Pack
Small buffer bottles offer a convenient option for quick calibration and spot checks. Bottles contain high precision calibration standards and storage solution. Each Starter Kit pack includes four bottles, one each of pH 4, 7, and 10 buffers as well as 1 bottle of Electrode Storage Solution. Include buffers with all of your pH meters.

20 ml "Singles" Assortment Pack
"Singles" buffer pouches offer a convenient option for quick calibration and spot checks. Pouches are air-tight and are high precision calibration standards. Each assortment pack includes four pouches each of pH 4, 7, and 10 buffers, Electrode Storage Solution and Electrode Cleaning Solution. Include an assortment pack in all of your pH kits.

500 ml Bottles and Assortment Pack
For routine pH calibrations, a convenient 500ml bottle is available in pH 4.00, 7.00, and 10.00 NIST-certified buffer solutions. With a solution pack, you can order everything you need to calibrate and store your pH electrodes. Each assortment pack includes one 500-ml bottle each of pH 4.00, 7.00, and 10.00 NIST-certified buffers and one 500-ml bottle of storage solution to properly store your electrodes while not in use.