Pressure transmitter
First Claim
1. A pressure transmitter comprising:
- a base body having sidewalls that form a recess;
a membrane that seals the recess to form a chamber in cooperation with the base body;
a pressure transmitting medium within the chamber, where the pressure transmitting medium is acted upon by an external pressure on an exterior side of the membrane;
where coefficients of thermal expansion of the and of the base body and the coefficient of thermal expansion of the pressure-transmitting medium are established such that a temperature-induced volume change in the chamber is let approximately the same as a temperature-induced volume change in the pressure-transmitting medium.
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Accused Products
Abstract
The invention relates to a pressure transmitter for an overload-proof pressure gauge, comprising a base body, a separating membrane disposed on a pressure-sensitive side of the pressure transmitter and subjectable to a pressure to be measured, a communicating chamber located inside said base body, which receives a pressure transmission medium, said chamber being closed on the pressure-sensitive side by the separating membrane, wherein the coefficient of thermal expansion of the pressure transmission medium is established in such a way that a temperature-induced change in the volume of the communicating chamber equals a temperature-induced change in the volume of the pressure transmission medium.
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Citations
18 Claims
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1. A pressure transmitter comprising:
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a base body having sidewalls that form a recess;
a membrane that seals the recess to form a chamber in cooperation with the base body;
a pressure transmitting medium within the chamber, where the pressure transmitting medium is acted upon by an external pressure on an exterior side of the membrane;
where coefficients of thermal expansion of the and of the base body and the coefficient of thermal expansion of the pressure-transmitting medium are established such that a temperature-induced volume change in the chamber is let approximately the same as a temperature-induced volume change in the pressure-transmitting medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pressure transmitter for use in a pressure transducer, said pressure transmitter comprising:
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a base body;
a membrane attached to the base body to form a chamber between said base body and said membrane; and
a pressure transmitting medium contained within said chamber;
wherein coefficients of thermal expansion of said membrane and said base body, and the coefficient of thermal expansion of said pressure-transmitting medium are such that a temperature-induced volume change in said chamber is at least approximately the same as a temperature-induced volume change in said pressure-transmitting medium. - View Dependent Claims (10, 11, 12, 13)
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14. A pressure transmitter, comprising:
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a base body having a peripheral surface;
a membrane attached to the base body to form a chamber between said base body and said membrane; and
a medium contained within said chamber;
wherein coefficients of thermal expansion of said membrane, said base body, and said medium are such that a temperature-induced volume change in said chamber is at least approximately the same as a temperature-induced volume change in said medium. - View Dependent Claims (15, 16, 17, 18)
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Specification