... hole equipment:Sensor, Frequency electrical submersible motor, protector, gas-liquid separator, multi stages centrifugal pump, check valve, ... & sand production in various well.(6)Main page on LCD: Voltage, Amps, Frequency, Downhole fluid level, Downhole temperature ... .4.Installation and maintenanceSmart production equipment of Coal-bed methane is a non-rod & complete automatic ESP system, ...