2X Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 with Automatic Temperature Compensation

The usual salinity of the solutions
1.Fresh water -Less than 0.5 ppt
2.Brackish water -0.5 to 30 ppt
3.Saline water (Seawater)-30 to 50 ppt
4.- more than 50 ppt
(Salinity 36 ppt means, that there are 36 grams of salt in 1 liter solution.)
Measurement:
The liquid measurement is very easy. Place a few drops of the liquid on the optical part of the refractometer, cover the prism (the liquid spread more easily over the prism), look throught the eyepiece against the light (focus, if necessary)
and you be to read the result value on the scale.
reference temperature 20 Celsius
ATC - automatic temperature compensation (compensation range 0 ~ 30 Celsius)
focus possibility
length ~ 195 mm
quality technical design
colour:black
Material:Aluminum alloy + plastic

Package Contents:
2 * firm plastic case
2 * refractometer
2 * cleaning cloth
2 * suction tube
2 * screw driver
2 * operating instructions

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.