Freeze proof water gauge

The utility model discloses a freeze proof water gauge, including the casing, place the core in the casing, the impeller subassembly that is connected with the core in, set up table glass board and flip at the casing top, the core is outer airtight to be provided with and to prevent that the inside air of core from following the core upper portion exhaust translucent cover of falling the U -shaped. The utility model has the advantages that: add an inclosed translucent cover outside the water gauge core for discharge in the unable core upper portion of following of air in water gauge upper portion and the core, the water content in the assurance water gauge is no longer than 95%, and (being core upper portion) has an air chamber by the water -stop in the translucent cover promptly, forms the gas -liquid balance state in the water gauge, makes water can't enter into upper portion (generally the water level is in the calibrated scale below) of core. When the temperature reached the freezing point, because there