The MA921B/2M probe is designed for use with Milwaukee Monitors and Controllers.

Top Design Features:

The Milwaukee Double Junction ORP Platinum Electrode is probe specifically designed for the continuous analysis of aquariums.

Double Junction

The double junction design reduces risk of clogging leading to more stable ORP measurement and reduced maintenance.

Gel filled

Using a gel removes the need to maintain the electrolyte levels.

Platinum electrode

The platinum electrode is long lasting with little maintenance required.

Resin body

The resin body is highly durable, chemically resistant and protects against accidental breakage of the sensing bulb.

Care and Use

Properly maintaining your ORP probe will give your fast, accurate results for longer.

Here are our top three tips.

1. Always store with the cap full of buffer or storage solution not water.

2. Clean your probe regularly by soaking in cleaning solution.

3. Use MA9020 (200 mV–275 mV) Calibration Check Solution.