SN-51F series explosion-proof impeller flow sensor is also an intelligent flow switch, which is a delicate flow sensor with small volume and simple setting. It has built-in intelligent circuit, which can set the upper and lower limit alarm values of flow at will. It can remotely monitor the real-time flow conditions. The full parameters can be set at will on the site. The impeller measuring medium can be processed through the flow through the sensor intelligent circuit and then programmed at will.