ZSJZ water flow indicator is manufactured by Shanghai Jindun and it's the composition of automatic deluge extinguishing system. It pushes vane utilizing the flow of water in the deluge network to contact slight switch. Thus it converts current signal into electrical signal. It connects with controller to start automatic fire alarm system. It is used for checking the operation of automatic deluge system and the region of the fire.It is suitable for wet, dry and pre-act system.