±10 ppm Accuracy — Precise enough for water conditioning targets

Designed to withstand the knocks

Developed by growers and scientists

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

Hanna Instruments Manganese High Range Checker HC Calibration Check Set - HI709-11 lab grade ORP ±10 ppm Accuracy — PreciseThe 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