Milwaukee MA887 Digital Salinity Refractometer

Digital salinity refractometer for the rapid determination of salinity in liquids. Ideal for marine aquariums, aquaculture and water analysis, featuring automatic temperature compensation and a direct digital display.

What role do salt concentrations play in a healthy marine environment?

In the fields of marine aquariums, aquaculture and marine research, salinity is far more than just a numerical value – it forms the basis of life. Corals, fish and invertebrates thrive only within a precisely defined salinity range. Even small deviations can cause stress in marine organisms, disrupt their growth or lead to disease. Whether you are a passionate reef aquarist or the operator of a commercial breeding facility: it is absolutely essential that salinity is closely monitored!

The Milwaukee MA887 has been specially developed for the quick and easy determination of salinity in liquids. The digital refractometer determines the reading via the refractive index of the sample and displays the results directly on the screen. This eliminates the need for manual reading of a scale, as is required with traditional optical refractometers.

The Milwaukee MA887 digital salinity refractometer puts an end to uncertainty in salinity measurement. Unlike manual optical refractometers, whose results depend on subjective readings and lighting conditions, the MA887 delivers digital precision, reliability and reproducible results in a matter of seconds. This device allows you to reliably monitor and maintain stable conditions in seawater, thanks to its display in PSU (Practical Salinity Units), ppt (parts per thousand) and specific gravity.

Designed for professionals and serious aquarists, the MA887 uses optical technology and automatic temperature compensation (ATC) to deliver precise readings – even when sample temperatures vary. As just a few drops of sample water are sufficient for a laboratory-quality measurement, the device is indispensable for reef aquarium owners, aquaculture operators and marine researchers.

The device is particularly popular with saltwater aquarium owners, as salinity has a decisive influence on the well-being of many marine creatures. With the MA887, salinity can be checked in a matter of seconds, simplifying regular monitoring in aquarium operations.

Its robust construction and digital data recording make the MA887 a practical tool for aquatics, laboratories and water analysis.

Why should I use a Milwaukee MA887 digital salinity refractometer – the benefits for you

• Digital precision you can trust – Manual interpretation is a thing of the past. For fast and consistent results, the MA887 delivers precise readings with an accuracy of ±2 ppt.
• No manual scale reading required
• Flexible 3-in-1 measurement – Salinity can be displayed in ppt, PSU or as specific gravity (20/20), adapting to different requirements in marine aquariums and other applications.
• Automatic temperature compensation (ATC) – You don’t need to worry that temperature fluctuations might affect your results. ATC ensures precision even when temperatures vary.
• Quick and easy to use: Simply place a few drops of water on the prism, close the lid and read the result on the digital display within seconds.
• Minimal sample volume – Only 100 µL of water is required to perform the measurement – perfect for reef aquariums or systems with low water volume.
• Robust design – Durability thanks to a stainless steel sample well and sturdy construction, suitable for daily use in challenging environments.
• Versatile applications – Ideal for marine aquariums, coral care, aquaculture, shrimp farming, saltwater enrichment and laboratory testing.

Typical applications of the MA887 digital salinity refractometer

Aquaculture

• Monitoring salinity in fish farming facilities to support optimal growth and reproductive conditions.
• Maintaining consistent water quality to minimise stress factors and reduce the risk of disease in fish.

Marine aquariums and reef aquariums

• Monitoring and maintaining the optimal salinity for corals, invertebrates and marine fish.
• Supporting stable water conditions to promote effective biological filtration and a balanced marine ecosystem.

Laboratories

• Precise determination and reliable reproducibility of water analyses for research and investigative purposes.
• Suitable for applications in marine biology, oceanography and environmental science research.

Mixing and treating seawater

• Monitoring the salinity during the production of artificial seawater for aquariums, test facilities or research purposes.
• Helping to maintain consistent water parameters during water changes and the regular maintenance of saltwater aquariums.

Industrial applications

• Monitoring of salinity as part of quality control during seawater treatment and the production of brine solutions.
• Checking and monitoring of salt concentration in cooling systems, cooling towers and seawater desalination plants.

Shrimp and crustacean farming

• Monitoring and adjustment of salinity in hatcheries, rearing and holding facilities for crustaceans.
• Promotion of suitable conditions for shell development and for key metabolic processes in prawns and other crustaceans.

Aquaponics and salt-tolerant systems

• Monitoring of salinity in aquaponics systems operated with brackish water organisms or salt-tolerant species.

Choose the Milwaukee MA887 digital salinity refractometer – fast, accurate readings for a stable and healthy marine environment

With the Milwaukee MA887 digital salinity refractometer, you can maintain the delicate balance of your saltwater ecosystem – combining precision with ease of use. Whether you’re preserving colourful coral reefs or managing efficient aquaculture systems, the MA887 provides reliable salinity readings at all times.

Care and Maintenance Instructions

To ensure your MA887 always delivers optimal results:

• Rinse after each use – To prevent salt deposits or residues, clean the prism and sample well with distilled or deionised water.
• Avoid contamination – Ensure that no oils, chemicals or residues enter the sample chamber. Use clean pipettes or droppers to take samples.
• Check calibration before use – Use deionised or distilled water to check the zero point and ensure accurate readings – particularly when measuring in different salinity ranges.
• Store safely – When the device is not in use, it should be stored in a clean, protected and dry place. Avoid extreme temperatures or high humidity.

Contents

• Milwaukee MA887 digital salinity refractometer
• 9V battery
• User manual