There are intensive equipment in data center, where the heat is concentrated，at the same time, these precision equipment have high requirements for the temperature, humidity and cleanliness of the environment, therefore, it is necessary to have a reasonable airflow organization and distribution to effectively remove the heat in the machine room, so as to ensure that the machine room meet the environmental requirements of equipment such as temperature, humidity, cleanliness and air supply speed.

The low differential pressure sensor is mainly used to monitor the pressure difference between the two ends of the filter in the air conditioning system, participating in the variable air volume control system (VAVBox) and monitoring the pressure difference between the machine room, other rooms and corridors.

The filter in the air conditioning system is used to filter dust and impurities in the ventilation duct. As time accumulates, the dust on the filter will accumulate, which will gradually affect the air circulation of the filter. Due to poor air circulation, the pressure difference between the two ends of the filter increases continuously. The differential pressure transducer detects the pressure change, and the upper computer receives the signal from the low differential pressure sensor, when the signal value reaches the alarm point, it will start an alarm to remind of replacing or cleaning the filter.

The VAV controller adjusts the air supply volume and the temperature within the set range according to the actual temperature detected by the temperature sensor and the difference with the set temperature, the low differential pressure sensor detects the pressure change in the air duct to determine the air supply volume.

In order to ensure the air quality in the computer room, the primary room should maintain positive pressure. The pressure difference between the primary room, other rooms, and corridors should not be less than 5Pa, and the static pressure difference between the primary room and the outdoor should not be less than 10Pa. Using the low differential pressure sensor to monitor it can prevent the infiltration of outdoor air from destroying the environmental parameters in the machine room.

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