Capacitive fluid sensor
First Claim
1. A capacitive fluid sensor for sensing a dielectric constant of fluid, said capacitive fluid sensor comprising:
- (a) a sensor housing within which fluid to be sensed flows from a first housing end toward a second housing end, said sensor housing forming an external electrode;
(b) a fluid outlet pipe connected to said sensor housing between said first and second housing ends;
(c) an internal electrode;
(d) a first insulating support member, disposed within said sensor housing between said fluid outlet pipe and said second housing end, supporting said internal electrode within said sensor housing and closing said second housing end; and
(e) a sealing member, disposed between said first insulating support member and said sensor housing near said second housing end, sealing fluid to be sensed in said sensor housing such that sealing force increases fluid pressure.
1 Assignment
0 Petitions
Accused Products
Abstract
To increase the sealing effect with increasing fluid pressure in a capacitive fluid sensor for sensing a dielectric constant of fluid, the sensor comprises a sensor housing, a fluid outlet pipe connected midway in the sensor housing, an internal electrode, a first cylindrical insulating internal electrode support member disposed within the sensor housing between the fluid outlet pipe and a sensor housing end, and a sealing member disposed between the first cylindrical support member and sensor housing end. It is preferable to dispose a second flat insulating internal electrode support member formed with a central annular portion and plural arms extending from the annular portion so as to be fitted to a swollen-out portion of the sensor housing to reduce fluid resistance.
51 Citations
12 Claims
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1. A capacitive fluid sensor for sensing a dielectric constant of fluid, said capacitive fluid sensor comprising:
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(a) a sensor housing within which fluid to be sensed flows from a first housing end toward a second housing end, said sensor housing forming an external electrode; (b) a fluid outlet pipe connected to said sensor housing between said first and second housing ends; (c) an internal electrode; (d) a first insulating support member, disposed within said sensor housing between said fluid outlet pipe and said second housing end, supporting said internal electrode within said sensor housing and closing said second housing end; and (e) a sealing member, disposed between said first insulating support member and said sensor housing near said second housing end, sealing fluid to be sensed in said sensor housing such that sealing force increases fluid pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification