| 摘要 |
A pressure transmitter (144) produces signals indicative of a flow in a pipe(132, 536, 584, 608). The transmitter (144) has a pressure sensor (252) that is fluidly coupled to two ports (136, 138) in the pipe, and the pipe has a substantially constant cross section between the two ports. Aspects of the invention include a circuit (280, 282) coupled to the pressure sensor that produces a digital value related to the fluid flow as a function of the pressure difference between the two ports.
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