Pen Type Salinity & Temperature Meter: Ultimate NaCl Salt Water Quality Tester for Saltwater Aquariums, Hydroponics, and Food Processing Review

Came about 3 weeks after purchase. So slow. I could walk there and get it in less time. The item is extremely difficult to use and not accurate. The investment is definitely not worth it. I wanted to try to return the item and found that I had to pay for shipping back to China. I can't get a refund within a month. I would recommend any other alternative for this item type.

If you want your salinity expressed in specific gravity you need to convert it using salinity and temperature. This gives you a number in parts per thousand (e.g. 34.9 ppt) and in aquariums you need to know the specific gravity (e.g. 1.024). There are charts and conversion tables on the internet. I have NOT calibrated but I am getting accurate information. read. Calibration looks like a PAIN.

I bought this device and salinity refractometer at the same time. After the third use, it no longer measures accurately and comes without a calibration solution. Even with a recalibration solution, the recalibration process is a little intimidating. Buy a handheld refractometer and save time. If you want the digital precision this offers and are willing to frequently recalibrate it, this might be for you.