Marine Depot Aquarium Pro Refractometer

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$49.99  

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Marine Depot

Designed specifically for aquarium use to measure the salinity of natural sea water (NSW). Most handheld saltwater refractometers available in the hobby are designed and calibrated for testing brine solution, i.e. sodium chloride, and are not calibrated for the refractive index of natural sea water. This is a very important distinction: other salinity refractometers used for marine aquariums are designed to test saltwater and nothing else! The Marine Depot Aquarium Pro Refractometer is designed to measure the salinity of NSW taking into account all the other elements that comprise salinity in the marine water sample.

Even though the largest percentage of salt in the sea is sodium chloride, the presence of other significant ions such as magnesium and calcium in NSW results in a different refractive index to that of brine. A standard (brine) refractometer will therefore not give the correct salinity for NSW and a conversion factor must be applied.

For example, a 35 ppt (parts per thousand) solution of NSW has the same refractive index as a 36.5 ppt solution of brine. When using a brine refractometer, an aquarium hobbyist should therefore look for a reading of 36.5 ppt when trying to achieve a reading of 35 ppt for NSW.

Easier to Read

One of the other problems with most refractometers is the scale displayed normally reads from 0-100 ppt when we are really only interested in the region from 30-40 ppt. The Marine Depot Aquarium Pro Refractometer has therefore been specifically designed to read from 1.015-1.030 which gives you much better resolution of a normal 1.000-1.070 scale.

  • Marine Depot Aquarium Pro Refractometer
  • Protective Hardshell Case
  • Pipette
  • Soft Cloth
  • Calibration Screw Driver



Manufacturer Info

Marine Depot was started in 1998 by a self-professed reef geek and premed student Ken Wong. Ken envisioned a one-stop shop where customers could find everything they needed, from technical product specifications, reef aquarium information, expert advice on the hobby and friendly one-on-one customer support. Having grown from a one-man crew to being one of the world’s largest suppliers of reef and marine aquarium products, this very core philosophy still lives strong in the Marine Depot culture 17 years later.


Warranty

12 Month manufacturer warranty.

Accessories for Marine Depot Aquarium Pro Refractometer


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9 Questions
Displaying questions 1-9
 
Q
how to calibrate this refractometer?
If the scale does not go to zero, how can it be calibrated?
Asked : Jan 17, 2017
By : Paula, NH
 
 
 
A
The scale actually does go to zero. It is indicated by "---- ZERO----" at the bottom of the scale. The Pro refractometer can be calibrate with either RO/DI water or a calibration solution such as the Two Little Fishies AccuraSea. Let us know if you have any other questions.
Answered : Jan 17, 2017
By : MD Tech
 
 
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40 Reviewers (93%) would recommend this

Overall Rating:

5  Star
 29
4  Star
 7
3  Star
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2  Star
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 1
 
“Accurate”
5.0

Great device at a reasonable price. came calibrated, works great all reefers should have one.

  • 1
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“A must have!”
5.0

This is a must have tool for any marine aquarium. I love this thing! Easy to use and accurate. Thanks marine depot!

  • 1
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“Good Tool”
5.0

Easy to use tool for measuring water saltwater gravity levels!!

  • 1
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“Works as advertised”
5.0

Works just fine. It would be nice if the case were longer so that the refractor can be stored while extended (focused).

  • 1
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“good”
4.0

The refractometer works well with a single caveat. I would have preferred the scales to go all the way down to zero. Otherwise no complaints.

  • 1
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“Great Product!”
5.0

I am very impressed with this product. It is well made and, above all, very accurate. I made the mistake of solely using an inexpensive hydrometer, which over time became inaccurate. Because of this my salinity dropped to very low levels and before I found the problem I had lost a few corals and ...Read More

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“Refractometer”
5.0

The Marine Depot refractometer is much lighter than the model I am accustomed to which gave me the impression it may not be as sturdy as my previous model. However, the Marine Depot refractometer is more accurate. I have no idea why it is noticeably lighter but I would recommend it strictly due to i...Read More

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Overall, others give this:

40 Reviewers (93%) would recommend this

Overall Rating:

5  Star
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4  Star
 7
3  Star
 1
2  Star
 2
1  Star
 1