Intelligent Pump Control Box model M8 is applied for automatic liquid level control, pressure control and protection for deep well submersible pump /borehole submersible pump / pipeline pump with AC220V / AC230V / AC240V 50/60 HZ (at option), single phase, 0.37-2.2kw (0.5hp-3hp), direct start type. Pump Control Box model M8 measures the actual motor power (watts), not motor amps or power factor. The motor power draw at the moment of calibration is permanently memorized by M8.If the calibration power by more than ?5%, M8 will turn off the pump motor. It is very important to make sure the pump system is running normally during the calibrating process. Features ■ Over Load Protection ■ Under Load ( Dry Running) Protection ■ Over / Under Voltage Protection ■ Rapid Cycle (Pump Starts & Stops More than 4times within 1minute) Protection ■ Pump Motor Stalled Protection ■ Transient Surge Protection ■ Auto / Manual Switch ■ Panel Operation Lock ■ LCD Displays Pump Running Information ■ Adjustable Automatic Restart Timer ■ Light Signals Prompt For Uncompleted Parameter Calibrating ■ Pump Accumulative Running Time Displaying ■ Push Button Calibration ■ Computer Main Board and Module for Industrial & Civil Pump ■ Works With All Single Phase Motors ■ Applied for Water Supply By Float Switch and Pressure Switch ■ User Friendly Connection Diagrams ■ Integrated Design, Small Size, Easy to Install ■ Reserved Space for Installing Internal Start Capacitance of Pump Motor ■ RS485 Interface