Bell type micro manometer

The utility model relates to a bell jar type micro pressure gauge. The utility model is characterized in that a bell jar mechanism is used for measuring micro pressure, and the bell jar mechanism comprises a water tank (4) which is filled with water, an air guiding pipe (6) which is provided with a pressure guiding joint (5) and a bell jar (7) which is suspended in the water tank (4); one end of the air guiding pipe (6) which is provided with the pressure guiding joint (5) is arranged on the bottom end of the water tank (4), and the other end of the air guiding pipe (6) is arranged just under the bell jar (7). The utility model has the characteristics of accurate reading, reliable operation, strong overloading ability, high precision and high sensitivity, and the utility model can be used as a standard measuring appliance.