Hydrion™ Tri-Chek pH Buffer Chemvelope Set, pH 4, 7, 10

The Hydrion™ Tri-Chek buffer chemvelope calibration set is perfect for quick and easy pH meter calibration. When mixed with distilled or de-ionized water, Hydrion™ buffer chemvelopes will accurately produce 500 ml.of solution at pH 4, 7 and 10. Hydrion™ buffers are free flowing soluble powders that prepare clear or color safe solutions in minutes. The set contains three chemvelopes at pH 4, four chemvelopes at pH 7 and three chemvelopes at pH 10. Each chemvelope produces 500 ml of solution. Included with the set is 1 vial of Hydrion™ color key buffer preservative which prolongs the shelf life of the solution and automatically tints each solution to its own color value: orange for pH 4, green for pH 7 and blue for pH 10.

• NIST Standard