I've ever developed a surface-micromachined pressure sensor specifically
for oil well application. the first generation can measure pressures up to
8000 psi. the result was published in ASME:
Y. Xu, F. Jiang, Y.-C. Tai, E. Donzier, W. Loomis, and A.
Liberman, "A Surface Micromachined Nitride-Diaphragm High-Pressure Sensor
for Oil Well Application," ASME International Mechanical Engineering
Congress and Exposition, Orlando, Florida, 2000.

the second generation of the sensor can measure pressure up to 14000psi
with burst pressure exceeding 20000 psi. the problem is that the sensor
was developed for Schlumberger. I don't know if they would like to supply
this sensor. Anyway, I hope this information helps.

Yong

On Wed, 6 Nov 2002, Klauder, Jr., Philip R. wrote:

> Friends-
>
> My company is looking for sensors to use at the bottom of an oil well where
> the pressure can reach 6000 PSI, and the temperature can reach 160
> Centigrade.
> Sensor types:
>       Pressure
>       Temperature
>       Viscosity
>       Density
>       Accelerometer
>
> Do any of you represent companies with off-the-shelf or custom sensors that
> would be appropriate for this application environment?
>
> Phil Klauder
>
>
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