... of sensor can reach 5‰ that can provide3. Main function (1)According to various wells, Control fluid level dropping speed ... can record three months datum of down hole fluid level which can be collected, inquired and saved thru ... : Voltage, Amps, Frequency, Downhole fluid level, Downhole temperature, Wellhead temperature, Fluid production rate, Accumulative fluid volume, CBM production rate, Valve( ...