Patent ID: 6490919
Filing Date: 2002-12-10
Classification: G01F

Abstract:
A method for measuring the level of water in a well utilizing pressurized air comprising the steps of:initializing a means for controlling the sensing and monitoring of the water level measurement which first reduces pressure in an air column inserted into a well to existing ambient pressure by closing a first valving means located between a pressure sensor and the air column to exhaust and isolate the air column; opening a second valving means located between a pump and an air tank of substantially equal volume as the air column; starting the pump to charge the air tank to a predetermined measurement pressure and closing the second valving means to isolate the air tank as the measurement pressure is detected by the pressure sensor; opening the first valving means equalizing the measurement pressure between the air tank and the air column to obtain a direct pressure of the well water against the distal end of the air column; sensing the pressure of the well water exerted against the air column with the pressure sensor and calculating the water level from the resultant sensed pressure; and displaying the calculated water level on a visual display for viewing by a user.