Alarm: Beeps for 20 seconds

physically blocking sediment

5% Full Scale | +/-0

Hold Function — Freezes measurement on screen for convenient reading and recording

5V button cell batteries (included)   (LR44 or equivalent)

Milwaukee MA9020 ORP Calibration Solution 200-275 mV | 230 mL for Platinum & Gold Electrodes Groline calibration Alarm: Beeps for 20 secondsMilwaukee MA9020 ORP Calibration Solution 200 275 mV 230 mL The Milwaukee MA9020 is a lab grade ORP validation solution certified to the 200275 mV range. Designed for use with platinum and gold ORP electrodes, it ensures your meter delivers accurate, repeatable oxidation reduction potential readings every time. Whether you're managing water quality in aquaculture, hydroponics, laboratories, or industrial applications, the MA9020 gives you the