Milwaukee Digital Seawater Refractometer

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  • Milwaukee Digital Refractometer

Milwaukee Digital Seawater Refractometer

97% Recommend this to a friend (68 of 70)

SKU: 205463

reg. $114.99

Special Price: $97.74

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Quick Overview

The new Milwaukee MA887 Seawater Digital Refractometer encompasses 3 different types of user selected scales for the measurement of seawater providing for a much more precise evaluation. Each scale is temperature compensated.

Milwaukee Digital Seawater Refractometer Manual


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Product Questions

Do you sell the case that is recommended for it?
Question by: Sam on Oct 4, 2013 4:57:00 AM
Hi Sam,
We sure do. I believe this is the case that you are looking for.
Answer by: Bulk Reef Supply on Oct 4, 2013 4:57:00 AM

Full Details

The new Milwaukee MA887 Seawater Digital Refractometer encompasses 3 different types of user selected scales for the measurement of seawater providing for a much more precise evaluation. Each scale is temperature compensated.

  1. PSU - The newest type scale standard – Letters stand for Practical Salinity Units and is fast become the universal standard for seawater measurement
  2. PPT - The old standard of Parts Per Thousand of saturated salt. This is the oldest of the 3 seawater measurements scales
  3. S.G. - The current standard of Specific Gravity hydrometers and refractometers.

The Milwaukee Instruments MA887 digital refractometer is easy to calibrate and easy to read and provides highest accuracy possible for the measurement of seawater 3 specific scales. This is the type of accuracy demanded by today’s professionals and Milwaukee Instruments delivers.


Milwaukee Digital Seawater Refractometer Specifications:




PSU: 0-50 1 +/- 2
PPT: 0-150 1 +/- 2
S.G.: 1.000 - 1.114 0.001 +/- 0.002
Temp: 0-80C / 32-176F 0.1 C/F +/- 2 0.3 C/ +/- 5F
Calibration: Automatic


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  • Amazing ACCURACY By RJ on 9/29/2015

    My first salt water checkers were the old float hydrometers. In perfect condition, properly used they gavee fairly good results. Good enough for fish only aquariums. When I got back to the hobby five years ago, I soon found the new standard- swing arm devices just about worthless. Refractometers are a better solution BUT it was hard for me to detect small fluctuations. The Milwaukee Digital Refractometer is a well built, sound instrument that gives EXACT readings. Easy to read, easy to zero and easy to convert readings between different standards and easy to use.
  • Precise and practical By merlinpi on 9/29/2015

    using it is a breeze, results are fast and zeroing it is super easy with distilled water. would definitely recommend.
  • Great By Skippy on 9/20/2015

    Quick, easy and accurate. Love it
  • Quick and precise By ASeattle on 6/9/2015

    I'm a bit obsessive about testing and this helps take the guess work out. visual refractometers are great, this is for the people who would rather see a number. Easy to calibrate, add a sample and you're done. Auto shut off is convenient.
  • Works awesome By Dave on 6/6/2015

    Highly recommend product. Really love it! Makes mixing water a breeze
  • Time saver By BRIAN on 5/10/2015

    This refractometer is great, it's very fast and accurate. Every reefer should own one of these.
  • so easy! By Timothy on 4/28/2015

    I have 3 jobs, a wife, four kids, two reef tanks, and three freshwater tanks...I'm a busy fellow (yet I also want a chameleon for some unknown reason). Anyway, the point is that I like simplicity, accuracy, and something that allows me to do everything and still have enough time to enjoy it. This digital refractometer does the trick. It is super quick, accurate, easy to use, and did I mention quick and accurate...and easy to use? Get won't regret it!
  • Very Easy and Accurate By Tim on 3/31/2015

    By far the most accurate and easy to use refractometer I have ever used
  • Very easy to use By Chris on 3/23/2015

    I had a hard time justifying this expense - but when I did, I was really pleased. This device is VERY quick and easy to use… and for the first time, I know that I am getting proper temperature adjustments to my measurements.
  • Expensive, but well worth it. By Ben on 3/19/2015

    The one I received had a few of the lcd bars on the display not working properly. I contacted Milwaukee and could not have been more pleased with the customer service. They sent a replacement one in the mail the same day, once I provided them with a picture of the defective display and my invoice. As far as the unit goes, it works very well: Very fast, easy to read readouts. Comes with calibration fluid which I didn't realize so that's a plus. These are expensive, but it's worth it for good high quality products from Milwaukee. (We didn't get into this hobby to save money)
  • Its Great with one exception By Jeffrey on 3/12/2015

    This meter is simply amazing. I had been using a refractometer for the past 4 years. As both myself and the refractometer are getting older, I found it tough to read and calibrate each time. Looking through the little window into a light source... NO thanks. This meter is the cats meow. The only issue I have with it and I am still not sure everything is working correctly is the calibration / accuracy. The meter calibrates quickly and accurately with either the provided distilled water or my own RODI water. When using the supplied calibrated solution to 35 ppt / 1.025 SG, my meter ready 36 ppt and 1.026 SG. Then I attempted to use the pinpoint calibration solution and I found that it read 37 ppt and 1.027 / 1.028 SG.(varied over 4 samples) I realize there is a one digit rounding and calibration error allowed but seeing 1.028 when it should be 1.025 is a bit unsettling especially with a known value of 1.025. I believe this is a sound meter and a great tool to have in the reefing hobby, I just wish mine was a little closer to the known value because I will now always question it when it is in the higher salinity readings.
  • Makes checking SG easy By RDM on 2/20/2015

    I've had one of these for a year and it has worked very well. I recently added a second tank and a water mixing station. The first one worked so well and carrying it back and forth between the house and my shop got old so getting a second one seemed like a good idea. This is easy to calibrate and use which makes it quick and easy to keep an eye on the SG for my tanks and new water mixes. Highly recommended!

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