Milwaukee Salinity Digital Refractometer for Saltwater Aquariums - MA887
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Availability:
19 left in stock
Arrives
Tuesday, Mar 24
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Model: MA887
Features
- The MA887 is a rugged, portable digital refractometer designed for the measurement of salinity of natural or artificial seawater used in saltwater aquariums and reef tanks.
- The MA887 displays results in three popular measurement units: Practical Salinity Units (PSU), salinity in parts per thousands (ppt) and specific gravity (S.G. (20/20)).
- The instruments high accuracy and simple operation gives reliable results each and every time. All readings are automatically compensated for temperature variations and displayed within a 1.5 second response time.
- The sealed flint glass prism and stainless steel well are easy to clean. Just wipe with a soft cloth in preparation for the next sample.
Description
Milwaukee MA887 Digital Salinity Refractometer with Automatic Temperature Compensation, Yellow LED, 0 to 50 PSU, +/-2 PSU Accuracy, 1 PSU Resolution has a number of industrial applications. Samples are measured after a simple user calibration with distilled or deionized water. Within seconds, the refractive index and temperature are measured and converted into one of three popular measurement units; Practical Salinity Units (PSU), Salinity in parts per thousand(ppt), or Specific Gravity (S.G. (20/20))
Product Dimensions: 8 x 5 x 3 inches
Item Weight: 14.9 ounces
Manufacturer: Milwaukee Instruments
Item model number: MA887
Batteries: 1 9V batteries required. (included)
Is Discontinued By Manufacturer: No
Date First Available: June 24, 2004
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Mar 24
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Pattern Name: LAB
Style: Refractometer
Great for my reef tank. Very accurate.
Reviewed in the United States on March 8, 2025 by Jeff
Pattern Name: LAB
Style: Refractometer
We have a small educational aquarium with around 25 tanks and our staff uses this daily. It is very easy to use and holds up pretty well with all the use. It is easy to store based off size. Water stays on reader and is easily cleaned off. This is a good value for all the benefits it provides. The dark color helps hide any blemishes from wear and tear.
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Reviewed in the United States on February 26, 2025 by Amazon Customer
Pattern Name: LAB
Style: Refractometer
I don't get excited over new gadgets very often, but this tool is awesome. I am new to salt water aquariums and needed help with maintaining the correct specific gravity for my sea anemones. This meter has been accurate every time I have used it.
Reviewed in the United States on October 4, 2024 by Kindle Customer
Pattern Name: LAB
Style: Refractometer
i got this at someone's recommendation. i must say i was pleasantly surprised. I'm 6 months in, and its still going strong. i highly recommend though for anyone with any refractometers, to buy here on amazon a refractometer calibration liquid set at 1.026 just so you can always know with certainty. i mean its nice to know your refractometer is still accurate.
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Reviewed in the United States on January 3, 2025 by alex smith
Pattern Name: LAB
Style: Refractometer
First unit tested the calibration solution that came with it (1.025 SG) at 1.023SG I have a bottle of a different calibration solution, the most popular one on here, (1.026 SG) and it tested 1.028 on the Milwaukee. I calibrated several times using the distilled water, making sure the lens was clean each time, also waited 1 minute before testing and got the above results every single time. My reef tank tested at 1.028 SG as well. On my $20 lens refractomter, the calibration solutions all tested accurately and my tank tested at 1.026. Those of you who have reef tanks can probably understand I almost had a heart attack when it tested 1.028 SG I opted to have a replacement sent and this one also did not test properly. The 1.025 Calibration solution did test at 1.025 SG but my 1.026 SG calibration tested at 1.028 SG along with my tank. The $20 refractometer tested properly again with all three tests. Forgot to mention that I also used a hydrometer just to triple check everything and the tank tested at 1.026 SG Sending back the replacement for a refund. Reefers beware, this is not an accurate tester.
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Reviewed in the United States on January 23, 2020 by Steve
Pattern Name: LAB
Style: Refractometer
This one is hard to do a good review . first of all for the price the ma800 case should of come with it . Now it get tricky . the celebration is simple and easy . I had no problems zeroing it out . The problem is the verification . I see so may reviews in utub saying the same thing . The verification solution is marked 1.025 every reading I take I get 1.027 one out 10 1.026. Now if I take that same solution 1.025 and us it with my refractometer . I get a 1.025 reading . if I use my refractometer verification solution at 1.025 with the Milwaukee ma887 I get 1.025 . so to me Milwaukee is using a 3rd party verification solution that is not correct . I have yet to write to Milwaukee to see what they say . It Does state plus or minus .2 . It is very precise get the same number over and over . So the way my unit reads I always mines .01 if it reads 1.026 I will record the reading at 1.025 . then I will verify that reading in the next day using my refractometer. Also the MA877 doesn't read in halves if the reading is 1.025.6 it will read 1.026
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Reviewed in the United States on February 1, 2021 by Bill
Pattern Name: LAB
Style: Refractometer
I struggled with small cheap plastic hydrometers for many years and I've always doubted their accuracy, mainly because of air bubbles and degradation of the plastic as it ages. I've seen people use the optical ones but they are always pointing them at the room light to try to get a reading. It's nice to have something really accurate for a change that you can read in any light, I especially like that it takes into account the temperature! I'm amazed at the low price, this could easliy sell for $300 or more. It's really fast and easy to use. If there was one thing I could change it would be that I wish it had one more decimal place so you can tell if it's between for instance 1.023 and 1.024. If it read 1.0235 that would be awesome, but realistically the small changes in salinity between numbers won't have an effect on your aquarium. For those new at changing water I can share my method. I have a 14 gallon nano cube and I change 2 gallons twice a week. I measure out my water in gallon water jugs, similar to milk jugs only they had distilled water in them. I fill them with RODI water for my salt mix. Then I weight out 293 grams of Kent Marine Reef Salt Mix using a gram scale. That brings the salinity to 1.024 (263 grams will bring it to 1.021). Then I pour one gallon of water in a five gallon plastic jug, pour in the salt, cap and invert to mix several times. Then I pour in the last gallon rinsing out my salt container in the process, cap and invert to mix again. This initial mixing puts most of the salt into solution. Then I add a small powerhead and aquarium heater for a few hours and everything goes into solution without any further mixing. Then using two other gallon jugs I empty out exactly two gallons and pour in the fresh saltwater. Works like a charm!
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Reviewed in the United States on February 7, 2013 by BadddDoggg
Pattern Name: LAB
Style: Refractometer
Accurate, easy to use, easy to calibrate. It has made the testing process for my salt water reef tank so easy! Look no further!
Reviewed in the United States on December 26, 2024 by Dotti Dotti