· 100% made and assembled in USA

The Hanna GroLine HI9814 is one of the best meters for hydroponics

Traceability: Expiration date and lot number marked on packaging

and invertebrates

Connectors should be clean and dry

Milwaukee MA9112 pH 12.45 Calibration Solution 885148398963 · 100% made and assembledDESCRIPTION Probe calibration is a simple procedure for optimal performance and should be done any time your readings become suspect. Calibration should be performed at least once a month. MA9112 is a lab grade pH 12. 45 buffer solution certified to meet the standard to an accuracy of 0. 01 pH removing the inaccuracies involved with mixing buffers. Milwaukee solutions are designed to help you achieve reliable and repeatable pH measurements while