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Basic Understanding of Pressure Transmitter

A pressure transmitter is a device that converts a pressure measurement into an electrical signal that can be read and interpreted by other equipment. It typically consists of a pressure sensor, which detects the pressure of a fluid or gas, and an electronic circuit, which converts the pressure measurement into an electrical signal. The transmitter can be used to measure a variety of pressure types, including gauge pressure, absolute pressure, and differential pressure. The output signal can be a current or a voltage, and it is often used to control other process equipment or to monitor the pressure for safety or other reasons.

Endress+Hauser, a company that specializes in process measurement and automation technology, offers a wide range of pressure transmitters. These products can be broadly classified into several categories, including:

1)      Based on Pressure Measuring Principle

         a)     Differential Pressure Transmitter.

         b)     Absolute pressure transmitters.

         c)      Gauge pressure transmitters.

         d)      Smart pressure transmitters.

2)      Based on Working Principle.

          a)   Strain-gaugue

          b)   Piezoresistive.

          c)   Capacitive.

          d)   Inductive.

          e)   Optical.

          f)    Resonant.

The product lines of Endress+Hauser includes pressure transmitters with all above mentioned principle, this would allow the end user to select the transmitter that is most suitable for their application.

Selection Parameters of Pressure Transmitter :

When selecting a pressure transmitter, it is important to gather the following information from the client in order to ensure that the transmitter is properly matched to the application and meets the client’s specific needs and requirements:

Process information: The type of fluid or gas that will be measured, its viscosity, temperature, and pressure range, as well as any information about corrosive, abrasive, or erosive properties of the media. This will help in selecting a transmitter that is compatible with the process media and that can withstand the environmental conditions of the application.

Output signal and communication requirements: The type of output signal that is required by the control system, such as 4-20mA, Hart, or Fieldbus, and the communication protocol that is used by the control system.

Installation and mounting: The location where the transmitter will be installed, the type of mounting that is required, and any constraints on the size or shape of the transmitter.

Accuracy and measurement range: The level of accuracy that is required by the application, the measurement range that is needed, and the units of measurement that will be used.

Safety and compliance: Any safety or compliance requirements that must be met, such as explosion-proof ratings, compliance with industry standards, and certifications.

Maintenance and Service: The expected lifespan of the transmitter and the availability of service and maintenance facilities in the area

Budget: The budget that is available for the transmitter and any cost constraints that must be considered.

By gathering this information, it will be easier to select a pressure transmitter that meets the client’s specific needs and requirements, and that is well-suited for the application and environment.