The pressure controller adopts metal 316L diaphragm sensor, which can be used for neutral oil, gas medium and water. The set value of the controller can be adjusted, and the adjustment range of -0.1 ~ 40MPa can be selected arbitrarily. The explosion-proof mark of explosion-proof products is Exed II CT6. It can be used to realize automatic pressure control in the explosive gas mixture places of Class IIA, IIB, IIC CT1~CT6 group of media such as gas, liquid or steam that have no corrosive effect on the pressure sensing element.