Abstract: A system for analyzing fluids. In one embodiment, the system measures the water content in an oil/water emulsion. A fluid probe comprising an infrared light emitting diode and a phototransistor measures the opacity of the fluid. The signal from the phototransistor is input into a series of potentiometers which are set to correspond to different percentages of water content. The outputs of the potentiometers are displayed by a light emitting diode panel. Means for automatically recalibrating the system in response to temperature changes is included. Further, means is included for recalibrating the system to operate in fluids having different API gravities.In a second embodiment, the system analyzes a fluid to identify and differentiate different fluids in a mixture. The system can distinguish between petroleum products having different opacities; that is, the system can differentiate between crude oil, light oil and distillate.

Abstract: A system for monitoring and controlling the level of a fluid in a vessel, particularly applicable to controlling the pump operation at an oil well. The system includes a fluid level sensing unit having a plurality of sensors positioned at selected levels in the well casing outside the tubing string. The sensors operate independently to detect the presence of fluid and emit electrical signals which are received by a data conversion and sending unit immediately above the fluid level sensing unit in the well casing. The data conversion and sending unit converts the signals into discreet digital data bits which can be transmitted sequentially in one conductive wire to a data management and pump control unit at a convenient location nearby, usually at the well site. Thus, there is no need for a wire extending from each sensor. The data bits received by the data management and pump control unit are converted to a visual display in a light emitting diode panel.