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Chapter 1: System Description
Function and Theory
The Geocontrol PRO is a unique controller for operating down well bladder type
sampling pumps. When an external 12 VDC power source is connected to the controller,
the internal air compressor is capable of producing a pressure of 100 psi. This pressure
allows the user to take samples from a depth to 180ft.
The controller offers a variable cycle timer for controlling the portable compressor’s on-
time and off-time. While the compressor is on, air is pushed down well to the bladder
pump, compressing the internal bladder and evacuating the liquid in the pump. When the
compressor shuts off, the air pressure in the pump exhausts out of the system, allowing
liquids to enter the pump.
