1.Smart Drainage Equipment For CBM 2.Steady-going, Long life-span 3.Highly Automated Operation 4.Excellent Energy-Saving Smart production ... : CBM dedicated wellhead, cable junction box, water tank, smart control unit, A frequency control unit, B water quality control ... powder & sand production in various well.(6)Main page on LCD: Voltage, Amps, Frequency, Downhole fluid level, Downhole temperature, ...