Milwaukee MA921B/2 Lab Grade Double Junction ORP Platinum Probe with Extended Cable

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SKU: MA921B/2
Range: ± 2000 mV ORP


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

Design Features

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

Top features include:

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 electrolyle 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. Calibrate after cleaning and/or storage before testing to adjust for changes in the ORP probe sensor.


Body: PEI Resin

Reference: Double, Ag/AgCl

Junction: Ceramic

Electrolyte: Gel

ORP Range: ±2000 mV

Tip Shape: platinum pin

Dimensions: 6.4 inches

Recommended Operating Temperature: -5 to 70°C (23 to 158°F)

Cable length: 6.6 feet

Connection: BNC