AUTIDEFY Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT. Automatic Temperature Compensation Salt Water Tester
$16.99 (as of February 26, 2019, 5:02 pm)
This optical refractometer (salinity meter) has scales in the range of 0 – 100 ppt(0 – 10 %). The reading resolution is 1 ppt. It is designed for the measurement of seawater (marine aquaria) or very low concentrated salt solutions.
The second scale is for reading of the salt solution density in range 1.000 to 1.070 g/cm3 (resolution 0.001 g/cm3).
The usual salinity of selected aqueous solutions
Fresh water————–<0.5 ppt
Brackish water————–0.5 to 30 ppt
Saline water————–30 to 50 ppt
Salinity 36 ppt means that there are 36 grams of salt in 1 liter aqueous solution.
Content and equipment:
a firm plastic case
a cleaning cloth
a suction tube
a screw driver
a operating instructions
1.Accurate measurement based on good calibration, please calibrate the refractometer before your first use. But you don’t have to calibrate it frequently, once every a few months is OK.
2.When you put your sample to be tested on the daylight plate, make sure the liquid spreads across the entire surface of the prism without air bubbles or dry spots.
3.Clean the instrument with a soft cloth after each use, keep the refractometer dry and clean, which will keep the instrument accurate and durable. Do not put the entire instrument into water to wash, this may lead the refractometer to be foggy or rusty inside.