发明名称 |
FERROFLUID MODIFIED FILL FLUID FOR PRESSURE TRANSMITTERS |
摘要 |
<p>A pressure transmitter for measuring a pressure of a process fluid comprises a transmitter housing, a pressure sensor, a hydraulic relay system, a ferrofluid and transmitter electronics. The capacitance-based pressure sensor senses the pressure of the process fluid and is disposed within the housing. The hydraulic relay system comprises an isolation diaphragm positioned on an exterior of the transmitter housing, and an isolation tube extending from the pressure sensor to the isolation diaphragm. The ferrofluid is located in the isolation tube to transmit a change in the pressure of the process fluid at the isolation diaphragm to the sensor. The transmitter electronics are positioned within the housing and are configured to receive and condition a pressure signal from the pressure sensor.</p> |
申请公布号 |
WO2013085656(A1) |
申请公布日期 |
2013.06.13 |
申请号 |
WO2012US63804 |
申请日期 |
2012.11.07 |
申请人 |
ROSEMOUNT INC.;HEDTKE, ROBERT, CARL |
发明人 |
HEDTKE, ROBERT, CARL |
分类号 |
G01L9/00;G01F1/34;G01L9/12;G01L9/14;G01L13/02;G01L19/00 |
主分类号 |
G01L9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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