Electronic readout for piston-type differential pressure gauge
AssigneeParker-Hannifin Corporation
InventorsGregory S. Sprenger, Michael J. Gish, Jeff Gibson
Life of this patent
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Abstract
A piston-type differential pressure gauge provides an electronic output for remote monitoring. A linear potentiometer, in communication with a magnetic portion of the piston of the gauge, tracks the location of the piston. Resistance change in the potentiometer can be used by an electronic circuit to provide the electronic output of the differential pressure remotely to a data acquisition system or control electronics.
Claims20
A piston-type differential pressure gauge comprising:
- a piston including a magnetic portion;
- and
- a linear potentiometer operable to sense a position of the magnetic portion of the piston and provide an electronic output correlated to a position of the piston throughout a range of travel of the piston, the electronic output varying linearly with the position of the piston.
A piston-type differential pressure gauge configured to provide an electronic output, the gauge comprising:
- a housing;
- a piston slidably disposed within the housing and separating the housing into a high pressure side and a low pressure side, the piston comprising a magnetic portion;
- a backing spring disposed within the housing and operable to engage the piston on the low pressure side;
- a high pressure inlet in fluid communication with the high pressure side of the housing;
- a low pressure inlet in fluid communication with the low pressure side of the housing;
- and
- a linear potentiometer coupled to the housing, the linear potentiometer operable to sense a position of the magnetic portion of the piston and provide an electronic output correlated to a position of the piston throughout a range of travel of the piston, the electronic output varying linearly with the position of the piston.
A method of providing a differential pressure measurement of a fluid comprising:
- providing a piston-type differential pressure gauge comprising a piston including a magnetic portion, and a linear potentiometer operable to sense a position of the magnetic portion of the piston and provide an electronic output correlated to a position of the piston throughout a range of travel of the piston, the electronic output varying linearly with the position of the piston, the gauge coupled to a high pressure source and a low pressure source of the fluid;
- correlating the electronic output from the linear potentiometer to a differential pressure measurement using an electronic data acquisition system configured to receive the electronic output.
Dependencies are inferred from the claim text.