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€217.88
Milwaukee MW804 MAX Waterproof 4-in-1 pH / EC / TDS/Temp Tester with Replaceable Probe
Milwaukee MW804 MAX Waterproof 4-in-1 pH/EC/TDS/Temperature Tester with Replaceable Probe
Precision Meets Portability: Your All-in-One Solution for Water Quality Testing
In the dynamic world of water quality management, accuracy, efficiency, and reliability are paramount. Whether you're nurturing delicate hydroponic plants, ensuring optimal conditions in aquaculture, or maintaining pristine water in pools and spas, the Milwaukee MW804 MAX Waterproof 4-in-1 Tester stands as your trusted companion – delivering lab-grade precision in a portable, rugged form.
This advanced multiparameter tester is designed to simplify complex testing routines without compromising on performance. The MW804 MAX brings together four essential measurements – pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature – into one streamlined device, eliminating the need for multiple instruments. From checking nutrient concentrations to monitoring water balance, every reading helps you make informed decisions faster and with greater confidence.
Engineered for both professionals and passionate hobbyists, the MW804 MAX offers fast, stable readings and automatic temperature compensation, ensuring accurate results even under fluctuating conditions. Its intuitive design features a large dual-level LCD, a hold function for easier data recording, and an easy-to-navigate interface that minimizes training time and maximizes usability in the field.
Built to withstand harsh environments, the MW804 MAX features a waterproof IP65-rated body, a replaceable, low-maintenance pH electrode, and long battery life – making it a reliable companion across a wide range of water testing applications. Whether you're in the greenhouse, at the fish farm, or out on-site, this meter is ready to go wherever your work takes you.
With the MW804 MAX in hand, you gain more than just a tool – you gain peace of mind, knowing your water quality is under control with precision you can trust
Why Choose the Milwaukee MW804 MAX?
- Comprehensive Testing: Measure pH (0.00–14.00), EC (up to 20.00 mS/cm), TDS (0–10.00 ppt), and temperature (0.0 to 50.0°C / 32.0 to 122.0°F) with a single device.
- High Accuracy: Achieve precise readings with ±0.05 pH accuracy, ±2% Full Scale for EC/TDS, and ±0.5°C / ±1°F for temperature.
- User-Friendly Interface: Features a large dual-level LCD display with stability indicator and hold function for easy data recording.
- Automatic Temperature Compensation: Ensures accurate readings across varying temperatures.
- Replaceable Probe: Equipped with a gel-filled, double junction pH electrode for low maintenance and high performance.
- Durable and Portable: Lightweight at just 3.5 ounces and waterproof to IP65 standards, making it ideal for fieldwork.
- Long Battery Life: Approximately 100 hours of continuous use with auto shut-off feature to conserve battery.
Applications
The versatility of the MW804 MAX makes it suitable for a wide range of applications:
- Agriculture & Hydroponics: Monitor nutrient solutions and soil conditions to optimize plant growth.
- Aquariums & Aquaculture: Ensure ideal water conditions for aquatic life by regularly checking pH, EC, TDS, and temperature.
- Swimming Pools & Spas: Maintain safe and comfortable water by monitoring and adjusting chemical levels.
- Food & Beverage Production: Test water quality used in production processes to ensure product safety and consistency.
- Laboratory & Education: Provide accurate measurements for experiments and educational demonstrations.
- Industrial Applications: Monitor water quality in cooling towers, boilers, and wastewater treatment to prevent scaling and corrosion.
- Drinking Water & Water Treatment: Verify the quality of potable water and monitor filtration systems.
- Environmental Monitoring: Assess natural water bodies for pollution levels and support environmental protection initiatives.
Proper Care & Maintenance
To ensure the longevity and accuracy of your MW804 MAX:
pH Electrode Maintenance:
- Always store the pH probe with the cap filled with storage solution (MA9015). Avoid using distilled or deionized water for storage.
- Regularly clean and condition the pH electrode using Milwaukee Maintenance Solutions MA9015 & MA9016.
EC Sensor Care:
- Rinse the probe with distilled water after each use to prevent residue buildup.
- Calibrate regularly using appropriate calibration solutions to maintain measurement accuracy.
General Tips:
- Avoid immersing the tester beyond the maximum immersion level indicated on the device.
- Replace batteries when the low battery indicator appears to ensure reliable operation.
Order the Milwaukee MW804 MAX Today!
Whether you're managing hydroponic systems, caring for
aquatic life, maintaining crystal-clear pool water, or testing in the field or
lab, the Milwaukee MW804 MAX 4-in-1 Tester has you covered. With fast, accurate
readings of pH, EC, TDS, and temperature, it’s your all-in-one solution for
water quality monitoring.
Reliable. Rugged. Ready. Invest in professional-grade results – order
your MW804 MAX today!
Specifications
Application
Agriculture & Hydroponics
Monitor nutrient solutions and soil conditions to optimize plant growth.
In both traditional agriculture and hydroponic systems, maintaining the correct balance of pH, EC, TDS, and temperature is critical to ensuring healthy plant development and maximizing yields. The Milwaukee MW804 MAX allows growers to precisely monitor nutrient concentrations, helping to prevent deficiencies or toxicities that can stunt growth or harm crops. Regular testing of irrigation water and fertigation solutions ensures that plants receive nutrients in the most bioavailable form. In hydroponics, where water is the main delivery system, controlling EC and pH is especially crucial for maintaining ideal root zone conditions. With its fast, accurate readings and portable design, the MW804 MAX empowers growers to fine-tune their nutrient programs and respond quickly to any fluctuations, resulting in healthier plants, better harvests, and more efficient resource use.
How to Use the MW804 MAX in Agriculture & Hydroponics
- Prepare
the Solution or Sample
For hydroponics, collect a sample of your nutrient solution in a clean container. For soil-based agriculture, extract a soil slurry using distilled water (typically a 1:2 ratio of soil to water) and stir well before measurement. - Turn
On the MW804 MAX
Press the power button to activate the tester. Make sure the protective cap is removed and the electrode is clean. - Submerge
the Electrode
Place the electrode into the solution, ensuring that the sensor is fully submerged. Gently stir the meter to eliminate air bubbles and stabilize the reading. - Read
the Values
The MW804 MAX will simultaneously display readings for:
· pH – to assess the acidity/alkalinity of your nutrient mix or soil solution.
· EC (Electrical Conductivity) – to measure overall nutrient concentration.
· TDS (Total Dissolved Solids) – for estimating the total nutrient load in ppm.
· Temperature – to ensure your nutrient solution is within optimal thermal ranges.
- Record
and Act
Use the readings to adjust your nutrient mix or pH levels as needed. This helps avoid overfeeding, nutrient lockout, or suboptimal root conditions. - Rinse
and Store Properly
After use, rinse the electrode with distilled water to remove residue. Replace the protective cap with proper storage solution to maintain sensor longevity. - Calibrate
Regularly
For the most accurate results, calibrate your MW804 MAX routinely using standard calibration solutions, especially before high-stakes measurements.
Aquariums & Aquaculture
Maintaining water quality is crucial for the health and vitality of fish, corals, and other aquatic organisms. In both home aquariums and commercial aquaculture operations, fluctuations in pH, nutrient levels, or temperature can cause stress, disease, or even loss of stock. The Milwaukee MW804 MAX offers a reliable, all-in-one solution to keep your aquatic environments stable and thriving.
By measuring pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature, this waterproof tester allows aquarists and fish farmers to monitor the delicate balance of their water systems. Accurate readings help you:
- Ensure optimal biological functions like respiration and digestion.
- Prevent harmful ammonia spikes or mineral imbalances.
- Tailor feeding and water treatment strategies.
- Adjust filtration or aeration systems based on real-time water parameters.
Whether you're raising ornamental fish, breeding koi, managing a hatchery, or maintaining a reef tank, the MW804 MAX helps safeguard your aquatic ecosystem.
How to Use the MW804 MAX in Aquariums & Aquaculture
- Collect
the Water Sample (Optional)
For smaller aquariums, you can measure directly in the tank. For larger systems or multiple tanks, use a clean container to collect a water sample. - Power
On the Tester
Press the power button to activate the MW804 MAX. Remove the protective cap and ensure the sensor is clean and properly hydrated. - Insert
the Electrode into the Water
Submerge the electrode in the tank or sample container. Stir gently to eliminate trapped air bubbles and allow the sensor to stabilize. - Monitor
the Readings
The display will show:
· pH: Helps assess biological compatibility and buffering capacity.
· EC: Indicates ion concentration, important in marine tanks and aquaculture systems.
· TDS: Provides insight into dissolved substances that affect water clarity and quality.
· Temperature: Ensures thermal comfort and metabolic efficiency for aquatic life.
- Adjust
as Needed
Use the readings to:
· Regulate pH with buffers or water changes.
· Modify salinity or mineral levels.
· Optimize tank conditions for breeding, feeding, or treatment.
- Rinse
and Store the Tester
After testing, rinse the electrode with distilled or RO water. Refill the cap with storage solution and secure it to maintain electrode performance. - Calibrate
Regularly
For the best accuracy, calibrate the MW804 MAX routinely using standard solutions, especially if you test frequently or use the device in saltwater environments.
Swimming Pools & Spas
Keeping pool and spa water clean, safe, and comfortable is essential for health and enjoyment. Improper chemical balance can lead to skin irritation, corrosion of pool equipment, cloudy water, or the growth of harmful bacteria and algae. The Milwaukee MW804 MAX offers a simple yet precise way to monitor critical water parameters such as pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature all in one device.
- pH levels influence the effectiveness of chlorine and other sanitizers—too low can cause corrosion, while too high can lead to scaling and reduced sanitizer efficiency.
- EC and TDS measurements help detect total mineral content, salts, and dissolved chemicals that accumulate over time, indicating when water needs dilution or treatment.
- Temperature affects chemical reaction rates and swimmer comfort, making it important to monitor regularly.
By using the MW804 MAX, pool operators and spa owners can maintain ideal water chemistry, ensuring sparkling clear water, extended equipment life, and a safe swimming environment for family, guests, or customers.
How to Use the MW804 MAX in Swimming Pools & Spas
- Prepare
for Testing
Remove the protective cap and rinse the electrode with clean water to avoid contamination. - Power
On the Device
Press the power button to activate the tester. - Sample
Collection
For accurate results, collect water from about 18 inches below the surface in a clean container or directly dip the electrode into the pool or spa water. - Insert
the Electrode
Submerge the electrode in the water sample or pool/spa. Stir gently to ensure the sensor is fully immersed and free of bubbles. - Read
the Measurements
Wait for the readings to stabilize. The MW804 MAX will display:
· pH: Critical for chemical balance and sanitizer efficiency.
· EC: Indicates the overall salt and mineral concentration.
· TDS: Measures dissolved solids, helping detect buildup or contamination.
· Temperature: Impacts chemical behavior and user comfort.
- Interpret and Adjust
· If pH is outside the ideal range (usually 7.2–7.8), adjust with pH increasers or decreasers.
· High EC or TDS may mean it’s time for partial water replacement.
· Temperature readings can guide heating system settings.
- Post-Use
Care
Rinse the electrode with fresh water after each test to prevent residue buildup. Store the device with the protective cap filled with storage solution to maintain sensor accuracy and longevity. - Regular
Calibration
Calibrate the tester regularly with standard buffer solutions to ensure ongoing precision, especially during heavy pool/spa usage periods.
Food & Beverage Production
Water quality is a critical factor in food and beverage production, impacting product safety, taste, and consistency. Contaminated or imbalanced water can introduce unwanted flavors, affect fermentation, reduce shelf life, or even pose health risks. The Milwaukee MW804 MAX allows producers to precisely monitor key water parameters – pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature – ensuring that water used in every stage of production meets strict quality standards.
- pH monitoring helps maintain the correct acidity or alkalinity, crucial for processes like brewing, dairy production, and bottling.
- EC and TDS measurements detect dissolved salts and minerals that could influence taste or chemical reactions.
- Temperature control is essential for consistency in mixing, pasteurization, and fermentation processes.
By using the MW804 MAX, food and beverage manufacturers can safeguard product integrity, optimize processes, and comply with regulatory standards, contributing to higher quality products and customer satisfaction.
How to Use the MW804 MAX in Food & Beverage Production
- Prepare
the Device
Rinse the electrode with distilled water before use to avoid contamination and ensure accurate readings. - Power
On
Turn on the MW804 MAX by pressing the power button. - Collect
Water Sample
Use a clean, food-grade container to collect a representative sample from the water source or production line. - Measure
the Parameters
Submerge the electrode in the sample. Stir gently to eliminate air bubbles and ensure consistent contact with the water. - Record
the Readings
Wait for the readings to stabilize on the display:
· pH: To verify proper acidity or alkalinity levels.
· EC: To monitor mineral and salt concentration.
· TDS: To detect total dissolved solids affecting flavor or safety.
· Temperature: To ensure process conditions are met.
- Analyze
& Adjust
Use the measurements to adjust water treatment processes, ingredient formulations, or production parameters as needed to maintain product quality. - Clean
& Store
Rinse the electrode thoroughly with distilled water after each test. Store the device with the protective cap filled with storage solution to keep the sensors hydrated and calibrated. - Regular
Calibration
Periodically calibrate the tester using standard buffer solutions and conductivity standards to maintain accuracy, especially during frequent testing.
Laboratory & Education
In laboratory settings and educational environments, precision and reliability are essential for successful experiments and clear demonstrations. The Milwaukee MW804 MAX offers accurate, multi-parameter water testing – measuring pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature – all in one portable device. This makes it an ideal tool for students, teachers, and researchers to analyze water quality efficiently and with confidence.
Whether used for chemistry experiments, biology projects, or environmental science studies, the MW804 MAX helps users understand fundamental concepts such as acidity, ionic content, and thermal effects in liquids. Its easy-to-read display and waterproof design also make it practical for hands-on learning in classrooms, labs, and fieldwork.
By providing real-time data, the MW804 MAX encourages active learning, fosters curiosity, and supports accurate scientific reporting.
How to Use the MW804 MAX in Laboratory & Educational Settings
- Prepare
the Device
Ensure the electrode is clean and rinsed with distilled water before each use to prevent cross-contamination between samples. - Turn
On the Tester
Press the power button to activate the MW804 MAX. - Sample
Collection
Collect a small volume of the liquid sample in a clean beaker or test tube. - Immersion
and Measurement
Gently immerse the electrode into the sample, making sure it is fully submerged. Stir slowly to remove any trapped air bubbles around the sensor. - Read
and Record
Wait for the readings to stabilize on the digital display. Record the values for pH, EC, TDS, and temperature to analyze your experiment or demonstration. - Repeat
if Needed
For comparative studies or multiple samples, rinse the electrode with distilled water between tests to ensure accuracy. - Calibration
and Maintenance
Regularly calibrate the tester using appropriate buffer and conductivity standards to maintain accuracy. Store the electrode in the provided storage solution when not in use to preserve sensor life. - Data
Analysis and Discussion
Use the collected data to explain chemical reactions, water quality concepts, or other scientific phenomena, helping students connect theory with practical results.
Industrial Applications
In industrial environments, maintaining optimal water quality is critical to the efficiency, safety, and longevity of equipment. The Milwaukee MW804 MAX is designed to monitor key water parameters – pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature – helping to prevent costly issues such as scaling, corrosion, and microbial growth in cooling towers, boilers, and wastewater treatment systems.
By regularly testing water in these systems, operators can ensure the water chemistry remains within recommended levels, reducing downtime and maintenance costs. The MW804 MAX’s robust, waterproof design withstands harsh industrial conditions, while its multi-parameter functionality provides comprehensive data for informed decision-making. This contributes to improved process control, energy efficiency, and regulatory compliance.
How to Use the MW804 MAX in Industrial Settings
- Prepare
the Device
Before testing, make sure the electrode is clean. Rinse it with distilled water to remove any residues from previous measurements. - Power
On the Tester
Press the power button to turn on the MW804 MAX. - Sample
Collection
Collect a water sample from the system—such as from a cooling tower basin, boiler feed water, or wastewater stream—in a clean container. - Immersion
and Testing
Submerge the electrode into the sample. Ensure the sensor is fully immersed and stir gently to eliminate air bubbles that may affect readings. - Read
the Results
Wait until the readings stabilize on the display. Record the pH, EC, TDS, and temperature values for analysis. - Routine
Monitoring
Perform tests regularly to track changes in water quality over time. Use the data to adjust chemical treatments and operational parameters as needed. - Calibration
and Maintenance
Calibrate the MW804 MAX routinely using manufacturer-recommended standards to maintain precision. After use, clean and store the electrode properly to extend its lifespan.
Drinking Water & Water Treatment
Ensuring the safety and quality of drinking water is a top priority for public health and regulatory compliance. The Milwaukee MW804 MAX helps verify that potable water meets stringent quality standards by accurately measuring pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature. These parameters are essential for detecting contamination, assessing the effectiveness of filtration and purification systems, and maintaining balanced water chemistry.
Whether used by municipal water treatment facilities, private well owners, or water filtration system installers, the MW804 MAX provides reliable, real-time data to prevent potential health risks. Its waterproof design and multi-parameter functionality make it ideal for both field testing and routine maintenance of treatment processes.
How to Use the MW804 MAX for Drinking Water & Treatment
- Prepare
the Tester
Rinse the electrode with distilled water to avoid contamination from previous samples. - Turn
On the Device
Press the power button to activate the MW804 MAX. - Collect
the Water Sample
Obtain a representative sample of the drinking water or filtered water in a clean container. If testing directly from a tap or filtration outlet, ensure water flows steadily. - Immerse
the Electrode
Submerge the sensor fully into the water sample, avoiding contact with the container’s sides or bottom. Stir gently to remove any air bubbles. - Wait
for Stable Readings
Allow the readings for pH, EC, TDS, and temperature to stabilize on the display. - Record
and Analyze Data
Note the results and compare them against regulatory standards or system specifications to verify water safety and treatment efficiency. - Regular
Testing & Calibration
Conduct routine tests to monitor water quality over time and recalibrate the device regularly for consistent accuracy. - Clean
and Store
After testing, clean the electrode with distilled water and store the device as per manufacturer guidelines to maintain performance.
Environmental Monitoring
Monitoring the quality of natural water bodies – such as rivers, lakes, and wetlands – is critical for protecting ecosystems, wildlife, and human health. The Milwaukee MW804 MAX offers a reliable solution to assess key water quality parameters including pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), and temperature, all of which provide valuable insights into pollution levels and environmental changes.
Variations in pH can indicate acid rain impact or chemical spills, while EC and TDS levels reveal the presence of dissolved salts, pollutants, or runoff contaminants. Temperature readings help understand thermal pollution and its effects on aquatic life. By using the MW804 MAX in the field, environmental scientists, conservationists, and regulatory agencies can quickly detect changes, evaluate water health, and support initiatives to safeguard natural resources.
How to Use the MW804 MAX for Environmental Monitoring
- Prepare
the Tester
Clean the electrode with distilled water before use to prevent cross-contamination between sites. - Power
On the Device
Press the power button to switch on the MW804 MAX. - Select
Sampling Location
Choose a representative area of the water body – near the surface or at various depths, depending on monitoring goals. - Collect
Water Sample
Use a clean container or submerge the tester probe directly into the water, ensuring the electrode is fully immersed without touching sediments or debris. - Allow
Readings to Stabilize
Wait until the pH, EC, TDS, and temperature readings stabilize on the display. - Record
Data
Document the readings along with sampling location, time, and environmental conditions for trend analysis. - Repeat
Sampling
Conduct tests regularly to monitor changes over time and detect potential pollution events early. - Clean
After Use
Rinse the electrode with distilled water and dry before storing the instrument safely.
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