OCIO DETECTS THE STATIC PRESSURE GENERATED BY THE FLUID HEIGHT BY MEANS OF A TUBE INSERTED INTO THE TANK AND DISPLAYS THE FLUID LEVEL OR VOLUME. THE SYSTEM CONSISTS OF: A TUBE FOR DETECTING STATIC PRESSURE, THE TUBE END IS INSERTED FROM THE TOP OF THE TANK AND LOWERED DOWN INTO THE LIQUID UNTIL IT TOUCHES THE BOTTOM; A CONTROL UNIT FOR DISPLAYING THE LEVEL AND MANAGING THE SYSTEM. THE UNIT IS EQUIPPED WITH AN INTUITIVE, COMPLETE SOFTWARE AND PERMITS THE CONNECTION OF TWO ALARM OR LOCK DEVICES.