A blog intended to educate and inform those interested in industrial control instrumentation and process control equipment. Weekly posts on various subjects ranging from pressure / temperature / level and flow instruments, control valves, analytical instruments, drives and actuators, recorders, and process weighing.
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Showing the Difference in Function Between High and Low Pressure Ports on a Differential Pressure Transmitter
The following video demonstrates the different responses of a differential pressure transmitter to both positive and negative pressures applied to its high and low pressure ports. The response of pressure and vacuum to the "high" port is opposite the effect of pressure and vacuum (respectively) applied to the "low" port.