Nano-particle modified fill fluid for pressure transmitters

Details Nano-particle modified fill fluid for pressure transmitters Nano-particle modified fill fluid for pressure transmitters

2008-05-27

2008-05-27

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Electrical

Reexamination Certificate

active

11724747

ABSTRACT:
A pressure transmitter for measuring a pressure of a process fluid includes a pressure sensor, a hydraulic relay system and a pressure sensor fill fluid. The pressure sensor senses the pressure of the process fluid, and the hydraulic relay system provides a communication channel between the process fluid and the pressure sensor. The pressure sensor fill fluid in the hydraulic relay system comprises a first hydraulic fluid and a first volume of nano-particles. The first hydraulic fluid transmits a change in the pressure of the process fluid to the sensor. The first volume of nano-particles is suspended within the first hydraulic fluid and alters properties of the pressure sensor fill fluid.

REFERENCES:
patent: 6675655 (2004-01-01), Broden et al.
patent: 6782754 (2004-08-01), Broden et al.
patent: 6843133 (2005-01-01), Broden et al.
patent: 7080558 (2006-07-01), Broden et al.
patent: 7124641 (2006-10-01), Broden et al.

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