Milwaukee MW805 MAX 4-in-1 pH/EC/TDS/Temp Combo Meter with ATC - High Accuracy, Easy Calibration, Replaceable Probe, IP67 Rated, Long Battery Life

Milwaukee MW805 MAX 4-in-1 Waterproof pH, EC, TDS & Temperature Combo Meter

The Milwaukee MW805 MAX 4-in-1 Combo Meter is a professional-grade portable instrument that accurately measures pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature using a single integrated probe. Designed for growers, water treatment professionals, laboratories, food processors, and industrial users, the MW805 eliminates the need to carry multiple meters while delivering laboratory-grade accuracy in a rugged IP67 waterproof housing.

Featuring automatic temperature compensation (ATC), up to 5-point automatic pH calibration, EC and TDS calibration, GLP functions, and the ability to store up to 1,000 measurement records, the MW805 provides everything professionals need for reliable water quality and nutrient management.

The included MA852D/1 amplified combination pH/EC/TDS/Temperature probe combines four sensors into one rugged, replaceable probe, making field testing faster, simpler, and more efficient.

Four Critical Water Quality Measurements in One Meter

The Milwaukee MW805 MAX combines four essential measurements into one portable instrument.

pH Measurement

Measure pH from -2.00 to 20.00 with exceptional accuracy of ±0.01 pH, ideal for nutrient management, water treatment, laboratory testing, and industrial process control.

Electrical Conductivity (EC)

Monitor nutrient concentration and water conductivity from 0 to 4000 µS/cm.

Total Dissolved Solids (TDS)

Measure dissolved solids from 0 to 2000 ppm, with adjustable TDS conversion factors up to 3200 ppm using the 0.80 conversion factor.

Temperature

Measure temperatures from -20°C to 120°C (-4°F to 248°F) while automatically compensating pH and EC readings for improved accuracy.

Product Specifications

Features & Benefits

Four Measurements with One Probe

The integrated MA852D/1 combination probe measures pH, EC, TDS, and temperature without changing probes or carrying multiple instruments.

Laboratory-Grade Accuracy

Measures pH to ±0.01 pH, making it suitable for professional laboratory and field applications.

Automatic Temperature Compensation

Automatically compensates pH, EC, and TDS readings for sample temperature, improving measurement accuracy.

Up to Five-Point pH Calibration

Supports automatic calibration using seven standard buffer solutions plus two custom buffers for outstanding accuracy across a wide measuring range.

Adjustable TDS Conversion Factor

Customize TDS measurements using selectable conversion factors from 0.40 to 0.80 to match your application.

Data Logging

Store up to 1,000 measurements across multiple logging modes, including manual, interval, stability-triggered, and parameter-specific logging.

Good Laboratory Practice (GLP)

Dedicated GLP functions record calibration information and system status to support quality assurance programs.

Rugged Waterproof Construction

The durable IP67-rated enclosure protects the instrument from water, dust, and harsh field conditions.

Large LCD Display

The oversized display provides clear measurement values and operating information for easy viewing.

Replaceable Professional Probe

The supplied MA852D/1 amplified combination probe features:

• Integrated pH, EC, TDS, and temperature sensors
• Gel-filled reference
• Cloth junction to reduce contamination from fertilizer solutions
• Graphite EC electrodes
• Durable ABS body
• 1 m (3.3 ft) cable

Ideal Applications

The Milwaukee MW805 MAX is ideal for:

• Hydroponics
• Aquaponics
• Greenhouse growing
• Agriculture
• Fertigation
• Water treatment
• Wastewater treatment
• Laboratories
• Brewing
• Winemaking
• Food processing
• Aquaculture
• Environmental monitoring
• Educational institutions

Probe Care & Maintenance

Proper maintenance helps maximize probe life and measurement accuracy.

Storage

Always store the probe using Milwaukee MA9015 Storage Solution. Never store the pH sensor in distilled or reverse osmosis water.

Cleaning

Regular cleaning removes fertilizer residue, mineral deposits, and other contaminants that can affect accuracy.

Calibration

For best performance, calibrate after cleaning, storage, or whenever high accuracy is required.

Milwaukee recommends:

• MA9004 pH 4.01 Buffer
• MA9007 pH 7.01 Buffer
• MA9010 pH 10.01 Buffer (when needed)
• MA9015 Storage Solution
• MA9016 Cleaning Solution
• MA9061 EC Calibration Solution

Frequently Asked Questions

What does the MW805 measure?

The MW805 measures pH, electrical conductivity (EC), total dissolved solids (TDS), and temperature using a single integrated probe.

Is only one probe required?

Yes. The included MA852D/1 combination probe measures all four parameters.

Is the meter waterproof?

Yes. The MW805 features an IP67 waterproof housing suitable for laboratory and field use.

Does it automatically compensate for temperature?

Yes. The meter provides Automatic Temperature Compensation (ATC) and also allows manual compensation when required.

How many calibration points are supported?

The meter supports up to five-point automatic pH calibration, automatic EC calibration, and factory-calibrated temperature measurement.

Can data be stored?

Yes. The MW805 stores up to 1,000 measurements and includes multiple logging modes and GLP functions.

Can the meter connect to a computer?

Yes. The MW805 includes a Micro USB port for PC connectivity.

Who is this meter designed for?

The MW805 is ideal for hydroponic growers, greenhouse operators, water treatment professionals, laboratories, food processors, brewers, wineries, aquaculture facilities, and industrial quality control personnel.