Is the negative vacuum pressure gauge installed in the inlet or the outlet

Negative vacuum pressure gauge is installed in the air inlet. Negative vacuum pressure gauge installed in the air inlet can measure the system in the suction process of the negative vacuum pressure, because the air inlet is the location of the air into the system, the negative pressure will be formed here, through the readings of the negative vacuum pressure gauge, you can understand the degree of vacuum in the system to monitor the system's working condition and to ensure that the system's normal operation, therefore, the negative vacuum pressure gauge is installed in the air inlet. Negative vacuum pressure gauge is a kind of instrument used to measure the pressure under low pressure or vacuum state, composed of pressure sensor and display, used to measure and display the negative pressure value, widely used in scientific laboratories, industrial manufacturing, medical equipment, air-conditioning systems, and other fields that need to accurately measure the low pressure.