Milwaukee MW600 PRO – Professional dissolved oxygen (DO) meter

Dissolved oxygen is one of the most important indicators of water quality. It directly affects plant growth in hydroponic systems, fish health in aquaculture, and the efficiency of biological processes in water purification. The Milwaukee MW600 PRO is designed to provide accurate and reliable measurements in both laboratory and field conditions.

The device uses a MA840 polarographic probe with automatic temperature compensation, which eliminates the influence of temperature on the results. Calibration is easily performed at two points - in 100% saturated air and in a zero oxygen solution, which guarantees high accuracy of measurements.

The large LCD display clearly shows the measured values, and the compact housing makes the MW600 PRO convenient for carrying and working on site. The device is particularly suitable for monitoring oxygen in nutrient solutions, tanks, ponds, aquariums, fish ponds and various aquatic systems.

The polarographic probe features a replaceable membrane and electrolyte, which facilitates maintenance and significantly extends the service life of the measuring system. Low power consumption ensures up to approximately 70 hours of continuous operation with a single 9V battery.

Technical characteristics

✔️ Manufacturer: Milwaukee Instruments

✔️ Model: MW600 PRO

✔️ Type: Portable DO meter (Dissolved Oxygen)

✔️ Measurement range: 0.0 – 19.9 mg/L

✔️ Resolution: 0.1 mg/L

✔️ Accuracy: ±1.5% Full Scale (@25°C)

✔️ Temperature compensation: Automatic (0 – 30°C)

✔️ Calibration: Manual, 2 points

✔️ Display: LCD, 3½ digits

✔️ Probe: MA840 polarographic probe

✔️ Cable length: 3 m

✔️ Operating temperature: 0 - 50°C

✔️ Maximum humidity: 95% RH

✔️ Power supply: 1 × 9V alkaline battery

✔️ Battery life: approximately 70 hours

✔️ Dimensions: 143 × 80 × 32 mm

✔️ Weight: 220 g (with battery)

📦 The set includes

✔️ 1 × Milwaukee MW600 PRO measuring tool

✔️ 1 × Polarographic probe MA840 with 3 m cable

✔️ 2 × Spare membranes

✔️ 1 × Electrolyte bottle MA7040 / MA9071

✔️ 1 × Calibration screwdriver

✔️ 1 × 9V alkaline battery

✔️ 1 × User Manual

🔧 Application

Suitable for:

• Hydroponic systems

• Aquaculture and fish farms

• Aquariums

• Lakes

• Wastewater treatment plants

• Laboratories

• Analysis of drinking and wastewater

• Water quality control

• Scientific research activity

📋 Method of use

1. Connect the MA840 probe to the device.
2. Remove the protective cap and make sure the membrane is clean and full of electrolyte.
3. Calibrate the device according to the manufacturer's instructions.
4. Immerse the probe in the solution being measured and wait for the readings to stabilize.
5. After measurement, rinse the probe with clean water.
6. Store the probe with the protective cap in place and periodically check the condition of the membrane and electrolyte.

⚠️ Important: For maximum accuracy, the manufacturer recommends regular calibration, periodic membrane replacement, and electrolyte replenishment as necessary. A damaged or contaminated membrane may lead to inaccurate measurements.

💡 Tip from Urban Botaniks: In hydroponic growing, maintaining high levels of dissolved oxygen in the nutrient solution promotes the development of a healthy root system, improves nutrient absorption, and reduces the risk of root diseases.