AUTOUTLET Salinity Refractometer Saltwater Aquarium for Seawater, Pool, Tank, Marine, Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Salinity Hydrometer Kit
$16.99
Price: $16.99
(as of Oct 30, 2025 08:41:09 UTC – Details)
Product description
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.
Is Discontinued By Manufacturer : No
Product Dimensions : 7.87 x 3.54 x 2.36 inches; 8.48 ounces
Item model number : EFU007c
Date First Available : April 3, 2018
Manufacturer : AUTOUTLET
ASIN : B07CB5KDYL
Best Sellers Rank: #44,871 in Pet Supplies (See Top 100 in Pet Supplies) #6 in Aquarium Hydrometers
Customer Reviews: 4.6 4.6 out of 5 stars 2,018 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
【AUTOUTLET Salinity Refractometer】This salinity tester is used to measure salinity of brine/seawater, monitor and control the concentration of saltwater. Ideal for aquariums and marine applications.
【Measures on 2 Scales】This saltwater hydrometer measures on dual scales: specific gravity and salinity. Ideal for aquariums, marine monitoring, agriculture, gardening and educational purposes.
【Measurement Range】Density of 1.0-1.070 with min scale of 0.001. Concentration of 0-100‰, with min scale of 1‰ (1‰=1PPT=1000PPM, PPT means “parts per thousand”, PPM means “parts per million”)
【With ATC Function】ATC compensation Range (i.e. Built-in Automatic Temperature Compensation System) from 10℃ to 30℃.
【Solid and Lightweight】Salinity meter is made of durable aluminum, which is non-staining, non-corrosive and rustless. Also, it’s compact in size with rubberized grip handle, very easy to carry.
Customers say
Customers find the refractometer reliable and accurate, with one noting it holds calibration over time. The product is easy to use, read, and calibrate, and customers consider it good value for money, with one mentioning it’s better than plastic hydrometers. The salt content aspect receives mixed feedback.
13 reviews for AUTOUTLET Salinity Refractometer Saltwater Aquarium for Seawater, Pool, Tank, Marine, Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Salinity Hydrometer Kit
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Mervyn –
Surprised
Excellant and reliable. (My first refractometer from Amazon was a dud, compete waste of money and a way out of calibraton.) This unit came calibrated. Not only that, I’ve not had to re-calibrate after numerous uses. Its as good as the refractomerter my aquarium store uses upon actual side by side comparison. I like the little pipettes that came with it… handy. I am surprised how good this unit really is. I have a salt water aquarium and make my own RODI water.
Andy –
Simple to use, accurate values
Accurate salinometer. I do calibrate it each time I use with a home-made calibration fluid. It works a treat, super cheap, and easy to read. Every saltwater keeper should get one as a back-up salinity device.
Stephen –
Does the job, exactly what lots of LFS uses.
This little refractometer works great, it is simple and comes with multiple pipettes, a nice case, a microfiber cloth, and the calibration screwdriver. I would definitely get some distilled water and calibrate it before use, I think mine was off by a little bit when it arrived. Definitely skip the super expensive ones, this will last you for a long time if taken care of. It also can be focused in the handle. The pictures in the listing are accurate.
Felina –
Great Salinity Gadget!
Iâm a scientist by profession, so I wasnât expecting this less-than-$20 instrument to work wellâbut to my surprise, Iâm quite pleased with the performance of this refractometer! The build quality feels sturdy and, with a few minor adjustments, I was able to read the salinity of my newly constructed saltwater aquarium.Here are some of my tips, for those who are interested in this refractometer:Blurry numbers? The eyepiece can easily be adjusted with a gentle twist, until the image is clear. (Very similar to a microscope!)Calibration to 0 (DI Water): If your fingers canât twist the calibration screw well enough, inside the storage box is a tiny (adorable) screwdriver to help.Accurate?: Well, if I knew the salinity already, I probably wouldnât have bought this refractometer. However, the values closely resemble my expectations for the saltwater I acquired.PRO-TIP: Use a gentle cloth, like the one provided, to remove the liquid when youâre done. Lenses are much easier to read if thereâs no water marks (air drying liquid) or scratches (removal with a rough surface).Attached is the reading of my saltwater aquarium sample (photographed by holding my phone up to the eyepiece).
Adam Eff –
Wrong range for pools
Nice gadget for the money. But, if you are buying this to monitor your pool, be advised you will be reaching the upper limit for salt concentration at just the fifth bar from the bottom of the scale. That is 1.005 specific gravity or 6.8 parts per thousand which is 6800 parts per million. Around 4500 PPM is the reccommended ceiling for saltwater pools. It works, but all your action will be in the bottom 5% of the scale.Do remove the little rubber cap and calibrate zero using distilled water and a small flat blade screwdriver.I went ahead and bought a digital combo meter that measures salinity, PH, temp, and TDS. That should save some time over this if it works as advertised. It was more than twice the money but hey, it’s all in the name of science. I might even come back and let you know how it worked out.
clarineter –
Accurate and worth the money
This refractometer works great – it’s accurate and extremely easy to use and maintain. The only trick is you need to calibrate it before using it on your fish tank, etc. Calibration is super easy – get a gallon of spring water from the store (mine was a whopping $0.99), and use a few drops of that to ensure that the device is calibrate – it should be reading 0 and 0% on each side, respectively. Once that is done, you can use it to accurately test whatever needs testing. I have compared it with my other salinity gauges for my saltwater aquarium, and this refractometer is consistently accurate while my other gauges are not. I also appreciate that this refractometer comes with a cleaning cloth, three pipettes for water drop collection and application, clear instructions, and a protective case. All in all, this was totally worth the money – I highly recommend this product.
Chris –
It is really good I will be getting more
It’s a really good price and works really good so I do recommend it is perfect
N. Smith –
Super easy to use
I needed this for a class study on salinity on various waterways in Florida. It worked beautifully, was easy to use and transported easily. I love the quality of this product.
Jonatan –
Producto genial !!
Lcocoyoc –
Esta herramienta para medir el nivel de salinidad del agua de mi medusario es excelente, muy fácil de usar, preciso y económico.
James –
Works well and is consistent. I can see rust already forming in the hinge after only five months but doesn’t appear to be effecting function.
Bernolin damien –
Bon refractometre pour eau de merFacile à utiliser,par contre il convient de bien faire l,étalonnage de l,appareil avec de l,eau distillée non parfumée pour obtenir une bonne précision de lecture,la notice est en français! Ãa peut aider pour les futurs acheteurs
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