Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent
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You'd have to start by defining "easily readable." My eyesight is bad, and I wear bifocals. Because the numbers are so small through the eyepiece, I need my son to help me read them. It's the gold standard for saltwater aquariums and measures extremely accurately; however, I'm not sure it would work as well on a ppt scale. The device uses specific gravity numbers and ppt to calculate the results. On the ppt side, it does read to zero, but I'm not sure if that will be the case for you. You could begin with a less expensive hydrometer or a more costly electronic reader. Check out WikiHow's How to Measure Salinity for more information. There are three different ways to get directions from it.
If it's a newly opened bottle, a suction tube will suffice.
The eye piece isn't adjustable, but when aimed at a bright light source, the numbers and scale are large and vivid. It's very easy for me to read, even though I'm blind.
Calibration fluid is available for purchase. With the small screwdriver provided, reset it to zero.
Selected User Reviews For Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent
Our tank was measured at 1. 02 by the refractometer. 028! We couldn't believe it, so we took the refractometer to our local fish store to double-check that we were using it correctly and calibrating it properly. To our surprise, it is correct, and our fish have been living in higher salinity than we previously realized.
Although it appears to be a solid device, it is completely useless for determining the salt level in a pool. The scale on the display is graduated with 100 marks (just like a ruler) over a one-inch length. Marks that are extremely small. A pool should have around 3200 PPM (million), and because this device is measured in thousandths, 3200 PPM is. On a scale of one to three, it's barely discernible and far from precise.
I'm blown away by the instrument's capabilities for under $20. When compared to our high-end (YSI) equipment, the less expensive device performs admirably. Unfortunately, using distilled water as a 'zero' did not work out well. The meter held its own after being calibrated against the YSI. br>br>My advice is to calibrate it once and then use it to measure relative salinity changes. Alternatively, you can make your own PPT using salt and water weight (see youtube), which will restore your tank to its original state, but you won't know what your salinity PPT is. Because the meter is simple to operate, you could take a reading from the pet store's water and compare it to your own.
If you're working at a desk, a desk light is a good idea. I waited a few months to write a review in order to give an honest assessment. It's dead on. The refractometer must be readjusted every now and then to ensure accuracy (but not frequently enough to become a problem). However, before changing the water in my aquarium, I go the extra mile and double-check the accuracy. It has a solid feel to it, and it comes with everything you'll need to test your water. If you can't get enough light from the window to get a clear reading, I recommend using a desk light. Don't be afraid to make a purchase.
This refractor was purchased for my Opae Ula (a native Hawaiian brackish water shrimp) and appears to be accurate. Because of the shrimp's toughness, I wasn't too concerned about its accuracy. The only complaint I have is that the eyepiece feels cheap, and it wasn't even close to being calibrated when I received it (which I fully expected based on other reviews). Calibrating it was a breeze: a few drops of distilled or RO water, a turn of the screw, and you're ready to go. I'm going to give it a shot the next time I need to set up a brine shrimp hatchery.
Using distilled water, this device was brought to zero. For testing, a 3000 ppm salt sample was created in the lab. This device reported less than 1% salt content. Test strips are a better option.
The plastic flap/cover that goes over the lens has a pin in it to secure it, and the pin is slowly working its way out, so I have to keep pushing it back in, but for the price, it's a great unit that's accurate.
I CAN'T EVEN EXPRESS HOW GREAT IT IS. I WAS AFRAID OF IT AT FIRST, AS I EXPECTED IT TO BE CUMBERSOME AND DIFFICULT TO USE, BUT IT IS EXTREMELY SIMPLE! DROP A DROP OF WATER ON THE GLASS, PLACE THE PLATE ON TOP OF IT, AND HOLD A LOOK THROUGH IT WHILE POINTING IT TOWARDS A LIGHT SOURCE. THE GAUGE IS VERY EASY TO READ AND SEE. THIS ONE IS SO MUCH MORE ACCURATE THAN OTHER DEVICES I'VE HAD, AND I KNOW IT WILL LAST FOREVER.
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