Randy Frank
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Re: Oct 9 - Part II: Basics of Specifying/Selecting Pressure Sensors
Randy Frank   10/9/2012 2:43:22 PM
@Frank - With accurate differential pressure measurement, does temperature need to be taken either side of the orifice ?

This is interesting question. When suppliers provide data regarding the effect of temperature on their sensor it is normally done with both sides of the sensor at the same temperature. If the sensor is temperature compensated, in a flow measurement the temperature sensing is an integral part of the sensor. If a large temperature difference exists between the upstream and downstream measurement, it should be essentially averaged in the sensing circuitry. If you are providing the temperature compensation yourself, what you have to consider is the upstream temperature or downstream temperature more important? Does the situation change over time? The answers may make you consider two temprature sensors but in most cases you should just need one.

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