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Milwaukee Mi5559 Waterproof pH / EC / TDS / Temperature Kit
Includes PH55 & EC59 Testers + MA753 Hard Carrying Case – High Accuracy, Replaceable Probes, Built for Real-World Use
The Milwaukee Mi5559 Kit is a professional dual-instrument solution combining the PH55 pH & Temperature Tester and the EC59 Conductivity / TDS / Temperature Tester, all neatly packed in the durable Milwaukee MA753 Hard Carrying Case for secure storage and easy transport. Whether you're managing a hydroponic system, maintaining an aquarium, brewing at home, or testing water quality in the field, this kit delivers precise, reliable measurements in even the toughest environments.
With features like replaceable probes, waterproof housing, and automatic temperature compensation (ATC), the Mi5559 is built for accuracy, durability, and long-term value.
What’s Inside?
· Milwaukee PH55 – Measures pH and temperature with ±0.1 pH accuracy.
· Milwaukee EC59 – Measures EC (µS/cm), TDS (ppm), and temperature with ±2% full scale EC accuracy.
· Both testers feature ATC, large dual-level LCD displays, and replaceable probes for extended life.
Why Choose the Mi5559 Kit?
- Complete Testing Power – pH, EC, TDS, and temperature in one convenient kit.
- High Accuracy – pH range: -2.0 to 16.0 (±0.1 pH); EC range: 0 to 3999 µS/cm (±2% FS).
- Replaceable Probes – Easy probe replacement keeps your tools going strong.
- Waterproof & Tough – IP65-rated for worry-free use in wet, rugged environments.
- ATC (Automatic Temperature Compensation) – Consistent accuracy in any conditions.
- Long Battery Life – Approx. 300 hours of continuous use.
- User-Friendly – Easy calibration, fast response time, and compact design.
Proper Care & Maintenance
To get the most out of your PH55 and EC59:
PH55 (pH Tester):
- Store with the cap filled with buffer or storage solution (MA9015), never plain water.
- Clean regularly with MA9016 cleaning solution.
- Calibrate after cleaning or extended storage.
- Gently stir in samples for a faster reading.
- Use the Milwaukee pH Maintenance Kit (PH-Main) to keep your electrode in top shape.
EC59 (EC/TDS Tester):
- Rinse with distilled water after each use to prevent build-up.
- Calibrate regularly using standard solutions (e.g. M10031B for 1413 µS/cm).
- Store dry with the cap on to protect the probe.
Your All-in-One Water Testing Companion
Whether you're mixing nutrients, keeping fish healthy, or brewing the perfect batch, the Mi5559 Kit gives you the confidence of professional-level results—anytime, anywhere.
Order the Milwaukee Mi5559 Kit today and take control of your water with accuracy, durability, and ease.
Specifications
Application
Market Applications of the Milwaukee Mi5559 Kit (PH55 + EC59)
The Milwaukee Mi5559 Kit is a versatile solution for users who need fast, accurate pH, EC, TDS, and temperature measurements across a wide range of applications. Whether you're growing plants, raising fish, brewing craft beverages, or managing water quality, this waterproof, dual-instrument kit helps you stay in control.
Hydroponics & Horticulture
In hydroponic and horticultural systems, maintaining the ideal nutrient and pH balance is critical to ensuring strong, healthy plant growth. The Mi5559 Kit allows growers to monitor both pH and EC/TDS levels with precision, providing essential insights into nutrient availability and root zone conditions.
Accurate pH measurement is key to nutrient uptake—if the pH is too high or too low, plants may struggle to absorb vital minerals, leading to deficiencies and stunted growth. At the same time, EC (electrical conductivity) or TDS (total dissolved solids) readings give a clear picture of how concentrated your nutrient solution is, helping you fine-tune feeding schedules and avoid issues like nutrient lockout or salt buildup.
By using both testers together, you can quickly detect and correct imbalances before they impact plant health. Whether you're growing leafy greens, herbs, or high-value crops like tomatoes or cannabis, the Mi5559 Kit helps you create the most favorable environment for vigorous root development, efficient nutrient absorption, and higher yields.
Aquariums & Fish Farming
Maintaining a stable aquatic environment is essential for the health and well-being of fish, plants, and beneficial microorganisms. The Mi5559 Kit provides aquarium enthusiasts and aquaculture professionals with the essential tools to monitor both pH and EC/TDS levels—two of the most important parameters in water quality management.
Accurate pH control is vital to prevent fish stress, disease, and behavioral changes. Sudden shifts or improper pH levels can weaken immune systems and disrupt the natural balance of your tank or pond. The pH tester in the kit helps ensure that your aquatic environment remains within the ideal range for the species you’re caring for, whether in a small freshwater aquarium or a large marine breeding setup.
At the same time, the EC/TDS tester allows you to monitor salinity and mineral concentrations—critical for marine systems and for maintaining mineral balance in freshwater tanks. In fish farms and aquaculture facilities, EC readings also help detect changes in water quality early, allowing for quick intervention before problems arise.
Whether you're a hobbyist managing a home aquarium or a professional running a fish farm, the Mi5559 Kit offers a reliable, easy-to-use solution for supporting a thriving aquatic ecosystem.
Home Brewing & Winemaking
Taking control of your fermentation process is essential for crafting beverages and foods with the best flavor profiles and consistent quality. The Mi5559 Kit helps home brewers, winemakers, and fermentation enthusiasts maintain precise control over both pH and EC/TDS levels, ensuring a more successful and predictable outcome every time.
Monitoring pH is especially important for ensuring the right acidity levels throughout the fermentation process. In brewing and winemaking, slight shifts in pH can affect the flavor, clarity, and microbial stability of your product. Whether you're fermenting beer, wine, kombucha, or other fermented foods, the pH tester helps you maintain an optimal pH range to achieve consistent taste, proper fermentation, and the desired end product.
In addition, measuring TDS (total dissolved solids) with the EC59 tester is essential for assessing water quality before fermentation begins. The mineral content in water can greatly influence the fermentation process and the final flavor of your brew. By measuring TDS, you can adjust your water profile to ensure the perfect balance of minerals, leading to a more refined and controlled fermentation environment.
With the Mi5559 Kit, you have the tools to monitor the critical factors that impact fermentation and flavor development, making it ideal for brewing beer, producing wine, fermenting kombucha, and crafting other fermented delicacies.
Swimming Pools & Spas
Maintaining clean, safe, and balanced water is essential for creating an enjoyable swimming experience while protecting your pool and equipment. The Mi5559 Kit gives pool and spa owners the tools they need to ensure their water stays in optimal condition, with easy monitoring of both pH and EC levels.
Accurate pH testing is crucial for ensuring swimmer comfort and promoting chlorine efficiency. If the pH is too low (acidic), it can irritate the skin and eyes, while a high pH (alkaline) can lead to cloudy water and reduced chlorine effectiveness. Proper pH balance ensures that chlorine works effectively to sanitize the water, keeping it clean and safe for swimmers.
The EC tester in the kit is especially important for saltwater pools, where maintaining the right salt concentration is key for the production of chlorine through salt chlorinators. By regularly monitoring the salt levels with the EC/TDS tester, you can ensure the salt is within the ideal range, allowing the chlorinator to work efficiently and keep the pool water clear and safe.
Additionally, unbalanced water can lead to equipment damage, such as corrosion or scaling on surfaces and pipes. By keeping pH and salt levels in check, you can prevent costly repairs and prolong the life of your pool’s filtration system, pumps, and other equipment.
The Mi5559 Kit is your go-to solution for hassle-free pool and spa maintenance, ensuring both water quality and equipment longevity for a better swimming experience.
Water Treatment & Purification
Ensuring safe and compliant water quality is crucial for both health and environmental reasons, and the Mi5559 Kit offers an effective way to monitor water quality in residential, municipal, and industrial water systems. By regularly measuring pH and EC levels, you can maintain optimal water conditions for safe consumption, effective chemical dosing, and proper disinfection.
pH testing plays a vital role in water treatment by helping to monitor and adjust the acidity or alkalinity of water. Proper pH levels are essential for the effectiveness of chemical agents, such as disinfectants and flocculants, used in water treatment processes. If the pH is too high or too low, it can reduce the effectiveness of these chemicals, potentially leaving the water improperly treated or contaminated.
The EC/TDS tester in the Mi5559 Kit helps detect changes in conductivity, which can indicate the presence of contaminants or a decline in filtration system performance. For example, a sudden increase in conductivity could signal that pollutants or dissolved solids have entered the water supply, or it may indicate that filters or membranes are nearing the end of their lifespan and need replacement. By monitoring these changes, you can take proactive steps to address issues before they impact water quality or system efficiency.
Whether you're overseeing residential drinking water systems, municipal water treatment plants, or large-scale industrial purification processes, the Mi5559 Kit provides the reliable, real-time measurements needed to ensure water safety, quality, and regulatory compliance.
Food & Beverage Production
In the food and beverage industry, maintaining the highest quality and safety standards is crucial for both consumer satisfaction and regulatory compliance. The Mi5559 Kit provides an essential tool for quality control in various stages of production, ensuring that pH and EC levels are properly monitored for optimal taste, texture, and safety.
pH control is particularly important in the fermentation process, dairy production, pickling, and soft drink manufacturing. In fermentation, whether it’s beer, wine, or other fermented products, the pH level directly influences the microbial activity and the final taste profile. For dairy products like cheese or yogurt, pH must be carefully managed to ensure proper texture, flavor, and preservation. In pickling and soft drink production, pH also plays a key role in achieving the desired acidity, flavor, and preventing spoilage. By regularly monitoring pH, manufacturers can ensure consistent results and avoid issues like unwanted bacterial growth or inconsistent product quality.
The EC/TDS tester is equally important in the food production process. It helps monitor rinse water, ingredient water, and cleaning solutions to ensure that proper concentrations are maintained. For example, it can be used to assess the quality of water used in production, such as in ingredient dilution or rinsing processes, ensuring no excess salts, minerals, or contaminants that could affect the final product. EC measurements also ensure that cleaning solutions are correctly formulated for effective sanitation, helping to prevent cross-contamination and ensure hygienic conditions during production.
With the Mi5559 Kit, food and beverage producers can meet safety standards, optimize product quality, and adhere to HACCP (Hazard Analysis Critical Control Point) requirements, ensuring both safety and consistency across production lines.
Environmental Monitoring
Monitoring the health of natural ecosystems is essential for protecting our environment and ensuring the sustainability of aquatic habitats. The Mi5559 Kit is an invaluable tool for tracking water quality in lakes, rivers, groundwater, and other natural water sources, offering vital insights into the condition of these ecosystems.
By measuring both pH and conductivity, the Mi5559 Kit provides essential data to detect early signs of pollution or environmental stress. pH levels in natural water bodies are an important indicator of water quality, as fluctuations can signal the presence of pollutants or changes in the water chemistry that could harm aquatic life. For instance, a drop in pH could indicate acidification, often caused by industrial waste or acid rain, while a rise in pH might point to contamination from alkaline substances.
Conductivity measurements are equally important for assessing water quality. Conductivity is influenced by the amount of dissolved salts, minerals, and other ions in the water. A sudden spike in conductivity can indicate contamination from agricultural runoff, wastewater discharges, or other sources of dissolved solids. Regular conductivity monitoring helps track these changes, providing early warnings of pollution before it becomes more severe and harder to manage.
The Mi5559 Kit is ideal for supporting research, conservation efforts, and regulatory compliance. Whether you're conducting environmental studies, assessing water quality for conservation projects, or ensuring that water quality standards are met for regulatory agencies, this kit provides accurate and reliable measurements to help protect natural ecosystems. By monitoring key indicators like pH and conductivity, it allows for a proactive approach to environmental conservation, helping to prevent long-term damage to critical water sources.
Laboratories & Education
The Mi5559 Kit is an ideal solution for both educational and professional research environments, providing reliable and precise tools for teaching and conducting scientific experiments. Whether used in school labs, fieldwork, or advanced research settings, this kit enables users to explore essential electrochemical principles and water chemistry with ease.
In educational settings, the Mi5559 Kit offers a hands-on approach to learning, allowing students to directly measure pH and conductivity, which are fundamental concepts in chemistry and environmental science. By using the kit, students can observe how different substances and environmental factors affect water quality, helping to reinforce theoretical knowledge with practical experience. It’s perfect for experiments that demonstrate the relationship between ion concentration, conductivity, and pH balance, essential for understanding water chemistry and electrochemistry.
For more advanced research, the Mi5559 Kit delivers the precision and accuracy needed to obtain reliable data in various laboratory applications. Researchers can use it for water quality studies, environmental monitoring, or even chemical analysis in controlled experiments. The dual functionality of the kit makes it versatile, enabling researchers to simultaneously monitor both pH and conductivity, which is crucial in a wide range of scientific investigations, from environmental science to materials research.
In the field, the portability and durability of the Mi5559 Kit make it a valuable tool for on-site measurements and data collection. Whether you’re conducting environmental assessments, studying water ecosystems, or gathering data for research projects, this kit provides the reliable performance required to make accurate decisions based on real-time measurements.
Overall, the Mi5559 Kit is not only an excellent educational tool for schools and universities but also a trusted instrument for professionals in research and environmental sciences, ensuring precise and actionable insights into water chemistry.
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