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12/17/2014 12:35 PM | |
Posts: 18 Rating: (0) |
Do which transmitter we select for -1 to 25 bar pressure measuring range? do we select differential pressure transmitter or absolute pressure transmitter |
12/18/2014 10:57 AM | |
Posts: 1 Rating: (0) |
There are 3 types of pressure measurement: 1) Gauge pressure = pressure measurementwhere reference pressureis atmosphere. Often shown with unit bar g 2) Absolute pressure = pressure measurementwhere reference pressureis vacuum. Often shown with unit bar abs 3) Differential pressure = pressure measurement of pressure differencebetween 2 points ( e.g. controlling of a filter: before filter pressure is 10 bar g , after filter 12 bar g . Differential pressure is 2 bar ) . Unit is bar without reference. If you have range of -1 to 25 bar itcould to be differential pressure , but normally it will be gauge pressure measurement. If application is to measure pressure within a pipe or vessel then you should use gauge pressure transmitter with calibrated of e.g. -1 to 25 bar g. Suitable SITRANS P DSIII would be 7MF4033-1E..... Further detailsplease findon "pressure homepage" www.siemens.com/sitransp |
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