Pressure Gauge
First Claim
1. A pressure gauge for sensing a pressure value comprising a first pressure sensor arranged to be used to provide pressure information in a first pressure range, a second pressure sensor arranged to be used to provide pressure information in a second relatively higher pressure range, a controller arranged to derive the pressure value from the pressure information, wherein the controller is arranged to derive the pressure value from pressure information from only one of the pressure sensors at any given pressure, the gauge comprising an information switch arranged to automatically switch between the pressure sensors at a threshold pressure such that below the threshold pressure, the pressure value is derived from pressure information from the first sensor and above the threshold pressure, the pressure value is derived from pressure information from the second sensor.
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Abstract
This invention is a pressure gauge designed to measure pressure over a very wide range of pressures, while maintaining a very high accuracy throughout the range. This invention reduces the number of gauges someone would need to accurately measure pressure over a wide range.
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Citations
14 Claims
- 1. A pressure gauge for sensing a pressure value comprising a first pressure sensor arranged to be used to provide pressure information in a first pressure range, a second pressure sensor arranged to be used to provide pressure information in a second relatively higher pressure range, a controller arranged to derive the pressure value from the pressure information, wherein the controller is arranged to derive the pressure value from pressure information from only one of the pressure sensors at any given pressure, the gauge comprising an information switch arranged to automatically switch between the pressure sensors at a threshold pressure such that below the threshold pressure, the pressure value is derived from pressure information from the first sensor and above the threshold pressure, the pressure value is derived from pressure information from the second sensor.
Specification