Dual-Purpose Formula: Calibrates pH and EC/TDS meters with one convenient solution

When your membrane reaches the end of its lifespan

protecting your plumbing

0 °C / 32

Can withstand the demands of growing environments

Hanna Instruments Manganese High Range Checker HC Calibration Check Set - HI709-11 lab grade ORP Dual-Purpose Formula: Calibrates pH andThe Manganese High Range Checker HC Calibration Check Set HI709 11 provides a simple solution to validating the Manganese High Range Checker HC HI709. This high quality set of standards is manufactured in our state of the art facility and comes supplied with a Certificate of Analysis. The Certificate of Analysis provides the lot number, reference values and expiration date for traceability when certifying the Checker HC. Supplied with Certificate of