Salinity Tester + Glass Trial Jar Scale: 0 to 300 Lenght: 19.5 cm While measuring the salt concentration in the brine using the brine gauge - pour the examined brine to a narrow cylinder in the amount enabling free immersion of the float. After inserting the hydrometer to the cylinder, the concentration of the brine in [g] of salt in 1[L] water can be read directly on the scale. The brine gauge was calibrated at the temperature of 20°C, therefore, the examined brine should have this temperature, too. Made in EU