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Table of Contents

Table of Contents


Pressure Transmitters

Image of various pressure transmitters.Image Added


What are Pressure Transmitters?

A pressure transmitter is an instrument that outputs an electrical signal based on a pressure measurement of a fluid (liquid or gas). Pressure transmitters are often used to monitor pressure of equipment in the process industry (tanks, pipelines, etc.).

Pressure Transmitters

Pictures of different pressure transmitters.Image Removed



Components of a Pressure Transmitter

There are two components of a pressure transmitter. The transducer, measures or senses the pressure, and converts the physical variable to an electrical signal. The transmitter magnifies and relays the signal for long distances to a PLC. The signal is representative of the pressure range from the transducer.



Pressure Transmitter Sending Electrical Signals

Animation of a Pressure Transmitter (Transducer) sending electrical signals to a PLC.Image Modified


Pressure Measurement

Transmitters can measure pressure in three different ways:

  • Gauge Pressure - pressure is compared relative to local atmospheric pressure
  • Absolute Pressure - pressure is compared relative to absolute (zero) pressure
  • Differential Pressure - the difference of pressure between two points



Advantages

  • Measure pressure levels and pressure differences
  • Made of piezoelectric materials
  • Some pressure transmitters are self-calibrating


Disadvantages

  • Expensive

Suppliers


References



Contributors:

Contributors Summary
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Faculty Advisors: Rachel Malevich (alumni), Mary Robinson