An apparatus including an amplitude mapping circuit for converting at least a portion of an amplitude signal to a binary value and a plurality of amplifiers coupled to the amplitude mapping circuit, such that the binary value is transmitted to at least one of the plurality of amplifiers to specify a gain level of the amplifier. The system comprises a separator tank for separating oil from water in the emulsion, and means for separating gas from the emulsion. The signal contact and the ground contact are aligned and held in the housing, and the fixing portion is fixed to the housing.