Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Tester 0-100PPT & 1.000-1.070 Salinity Hydrometer Slatwater Refractometer with Automatic Temperature Compensation (ATC)

Worked well for a Biology Lab.

This is so easy to use. Calibrate with rodi water. Quality is excellent, it's easy to clean. Very durable, it's speedy to use too. Have no issues with anything sticking.

Good value easy to use easy to read, easy to clean, seems accurate, consistent with aquarium store and specific gravity test. — I do not have a laboratory grade instrument to test against.

I have not owned an expensive version of these to compare it to but it works fine. I calibrated with RO btw at my LFS and it’s been fine. Sometimes you need to get the light just right to read it but that may be normal considering how they work.

This was easy to learn to use and is sturdy. It comes in a case that keeps it safe, clean, and organized. It’s small enough to fit into my hermit crab supplies drawer and doesn’t need any batteries/charging. Just sunlight!

Absolutely love this item! Easy to use and read after calibrated.

Nice budget refractometer, I use it for my reef tank and it is relatively easy to read.

Glad I got it, much more accurate than other digital, gravity types - Initially shied away from this due to calibration that was a mistake, the calibration takes seconds. salinity check is fast, accurate.

Accurate and easy to use. The refractometer was exactly as described, well-calibrated, and perfect for reef tanks. Highly recommended!

Es buen día quino cumple con el propósito

Very good refractometer for checking salinity you have to do calibration before use. Good seller responded me about my questions.

Quick and accurate. Don't forget to calibrate before use.

It is trash and it does not give good readings and when you move the focus wheel, it totally changes the reading. And The inner glass got broken while I am moving the focus wheel