PT500-805 differential pressure transducer series special differential pressure transducer controller for fire fighting system is assembled with NPC1210 high precision pressure sensitive chip imported from GE Company of the United States. It is specially designed for fire fighting system industry. It mainly monitors the difference between ventilation shaft and outdoor atmospheric pressure of high-rise building corridors, such as indoor and outdoor atmospheric pressure under normal circumstances. The air pressure is equal. When the fire happens in the room, the air pressure will be greater than that outside. At this time, the display value of the pressure differential transmitter will become larger. When the value is large enough to the preset value, the transmitter relay will act, and the transmitter relay will open and close frequently, and the normal closure will open and close frequently, so as to realize the opening and closing of the air valve on the roof of the control building. The shell is aluminium alloy and_6 tower head structure, which can be directly installed on the measuring pipeline or connected through the booster pipe.
