Measurement Accuracy : +- 0.1%Weight : 110gMin. Div. : 0.1%Brix Range : 0Model Number : Salinity RefractometerCertification : CEBrix Min. Div. : 0.1%Size : 18x2 cmUsage : SalinityMeasurement Range : 0-100ppt & 1.000-1.070Model Number : Salinity RefractometerModel Number 2 : portable refractometerHandheld Salinity Refractometer ATC 0-100ppt & 1.000-1.070 Seawater Salinometer For AquariumProduct descriptionRefractometer for seawater and marine fishkeeping aquarium 0-100 pptDetails :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 the selected aqueous solutions1.Fresh water ---< 0.5 ppt2.Brackish water---0.5 to 30 ppt3.Saline water (Seawater)---30 to 50 ppt4.Brine---> 50 pptSalinity 36 ppt means, that there are 36 grams of salt in1 liter aqueous 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 will spread more easily over the prism), look throught the eyepiece against the light (focus, if necessary) and you will be able to read the result value on the scale.General technical parameters reference temperature 20 C ATC - automatic temperature compensation (compensation range 0 ~ 30 C) focus possibility length ~ 175 mm quality technical designContent and equipmenta refractometera cleaning clotha suction tubea screw driveroperating instructions