ITEM NAME:Digital 7 LED Salty Hydrometer Tester Salinometer Salinity Tester for Soup Description: Simple Mini portable pen design, easy to carry and operate. Uses conductivity test to measure the salt concentration in liquid food. Put the probe under the liquid surface by at least 2cm, but keep away from the container wall at least 1cm,the result will appear. On push button: press the button to power on,then it is ready for measurement. 7 Red LED for indicating salt concentrations: 0.3%~0.6% (Moderation); 0.8%~1.0% (Thick); 1.3%~2.0%.(High Concentration) Specification: Material: Plastic Color: White Size: 212 × 24.8 × 15.4 mm / 8.35 x 0.98 x 0.61inch Working Current: MAX 20mA (LED all bright) Measuring range: 0.3% ~ 2.0% Temperature range: 60 ℃ ~ 80 ℃.7 Red LED for indicating salt concentrations: 0.3%~0.6% (Moderation); 0.8%~1.0% (Thick); 1.3%~2.0%. (High Concentration). Working Current: MAX 20mA (LED all bright). Do not rinsing with a neutral detergent to clean the main part of the machine.