Monitor water quality with confidence using the Milwaukee MW600 PRO Portable Dissolved Oxygen Meter. Designed for reliable and straightforward dissolved oxygen (DO) measurement, this professional handheld meter is ideal for aquaculture, fish farming, aquarium management, koi ponds and environmental water testing.

Dissolved oxygen is one of the most important parameters in aquatic environments. Fish, beneficial bacteria and other aquatic organisms depend on sufficient oxygen levels to maintain healthy conditions.

The Milwaukee MW600 PRO provides fast, dependable dissolved oxygen readings through its polarographic oxygen probe, helping you monitor oxygen levels and make informed decisions about water quality management.

Whether you're managing a commercial fish farm, operating an aquaculture facility or maintaining a freshwater aquarium or koi pond, the MW600 PRO offers a practical and cost-effective solution for routine dissolved oxygen testing.

Key Features & Benefits

• Accurate Dissolved Oxygen Measurement: Measures dissolved oxygen from 0.0 to 19.9 mg/L with an accuracy of ±1.5% of full scale.

• Automatic Temperature Compensation: Automatically compensates for temperature variations between 0°C and 30°C.

• Two-Point Manual Calibration: Calibrates at zero oxygen and 100% air saturation for reliable measurements.

• Polarographic Oxygen Probe: Supplied with the MA840 reinforced dissolved oxygen probe featuring an oxygen-permeable PTFE membrane.

• Large Digital LCD Display: Easy-to-read measurements for convenient water quality monitoring.

• Portable & Lightweight: Compact handheld design suitable for fieldwork and routine testing.

• Extended Probe Cable: Supplied with a probe cable approximately 3 metres long, providing flexibility when testing tanks and ponds.

• Long Battery Life: Approximately 70 hours of continuous operation from one 9V alkaline battery.

• Replaceable Membrane System: Replaceable probe membranes and electrolyte solution help maintain reliable sensor performance.

Why Measure Dissolved Oxygen in Aquariums & Aquaculture?

Dissolved oxygen (DO) is essential for maintaining healthy aquatic environments.

Insufficient oxygen can cause stress in fish, affect feeding behaviour and compromise overall fish health. In intensive aquaculture systems, oxygen monitoring is particularly important because stocking densities, feeding activity, temperature and biological processes can all influence oxygen availability.

Regular dissolved oxygen testing helps you:

• Monitor oxygen levels in fish tanks and aquaculture systems.

• Identify potentially low oxygen conditions.

• Check the effectiveness of aeration and oxygenation equipment.

• Monitor water quality in koi ponds and freshwater aquariums.

• Assess oxygen levels during fish transport and holding operations.

• Support routine water quality management in commercial fish farms.

The Milwaukee MW600 PRO makes it easier to monitor these important water quality parameters and maintain better oversight of your aquatic environment.

Technical Specifications

Specification	Details
Brand	Milwaukee Instruments
Model	MW600 PRO
Measurement Parameter	Dissolved Oxygen (DO)
Measurement Range	0.0 – 19.9 mg/L
Resolution	0.1 mg/L
Accuracy at 25°C	±1.5% Full Scale
Calibration	Manual, 2-point (zero and slope)
Temperature Compensation	Automatic, 0–30°C
Probe	MA840 Polarographic DO Probe
Probe Membrane	Oxygen-permeable PTFE
Probe Cable	Approximately 3 metres
Operating Temperature	0–50°C
Maximum Relative Humidity	95%
Battery Type	1 × 9V alkaline
Battery Life	Approximately 70 hours
Display	Digital LCD

Easy Calibration & Operation

The Milwaukee MW600 PRO features a straightforward two-point calibration process to help maintain reliable dissolved oxygen measurements.

Calibration is performed using:

• Zero oxygen calibration: Establishes the zero reference point.

• 100% air saturation calibration: Sets the measurement slope using air-saturated conditions.

Once calibrated, the meter is ready for dissolved oxygen testing.

The automatic temperature compensation feature adjusts measurements for temperature variations within its specified compensation range, making it suitable for routine monitoring in different aquatic environments.

Probe Maintenance & Care

The MW600 PRO uses a refillable polarographic probe that requires periodic maintenance to maintain measurement performance.

For best results:

• Check the probe membrane regularly for damage, wrinkles or signs of wear.

• Replace damaged or worn membranes when necessary.

• Use fresh Milwaukee MA9071 electrolyte solution when refilling the probe.

• Ensure there are no air bubbles trapped inside the membrane during preparation.

• Keep the protective probe cap fitted when the meter is not in use.

• Calibrate the meter regularly and whenever required by your testing routine.

Replacement membranes and electrolyte solution are available separately.

What's Included?

The Milwaukee MW600 PRO is supplied with the following standard equipment:

• Milwaukee MW600 PRO dissolved oxygen meter.

• MA840 polarographic dissolved oxygen probe.

• Spare probe membranes.

• Electrolyte solution for probe preparation.

• Calibration screwdriver.

• 9V alkaline battery.

• Instruction manual.

Please note: Calibration solutions are not included with this product. Zero oxygen calibration solution (MA9070) is available separately.

Why Buy from GroAqua?

GroAqua supplies specialist water quality monitoring equipment for aquaculture, aquariums and water treatment applications.

We understand the importance of reliable water quality monitoring in aquatic environments, from domestic aquariums and koi ponds to commercial fish farming operations.

The Milwaukee MW600 PRO is an excellent addition to any aquaculture or aquarium water testing setup, providing a convenient and dependable way to monitor dissolved oxygen levels.

Order your Milwaukee MW600 PRO Dissolved Oxygen Meter from GroAqua today.