9 key questions for choosing your industrial pressure transmitter

Pressure measurement

The most common application is pressure transmitter to measure pressure and vacuum. The sensor is subjected to pressure, from a pump or compressor for example.

Hydrostatic Level Transmitter - Level Measurement

The pressure transmitter hydrostatic level sensor measures the difference in height between two points.
The sensor can be used to measure the height of a liquid column.

Flow measurement by differential pressure with a primary element

Differential pressure flow measurement is based on the pressure difference in a flowing fluid. This is achieved through the use of specific primary elements.

Examples of depressurizers include orifice plates, venturi tubes or nozzles. Other options include ^V-ConeTM flowmeters, averaged Pitot tubes, integrated orifices, and microventuris.

Differential pressure flow meters are used to measure the flow of liquids and gases in a pipe.

Density measurement

Density measurement by differential pressure transmitter is an effective method for measuring the density of liquids.

What is the nature of the fluid?

The nature of the fluid, such as gas, liquid or vapour, is an important factor to take into account when measuring processes.

Knowing the critical properties of the fluid to be measured is the key to choosing the right sensor for your industrial process.

What type of pressure is being measured?

The type of pressure to be measured: Differential / Gauge / Absolute / Vacuum is an important consideration when choosing the right pressure transmitter.

• pressure transmitters are suitable for measuring pressure differentials and low pressures. They are particularly useful for measuring filter clogging. They can also be used to measure fluid flow rates when combined with depressurizing devices.
• The pressure transmitters relative or vacuum sensors are more suitable for measuring static pressure or negative gauge pressure. In these cases, the sensor is subjected to pressure, from a pump or compressor for example.
• pressure transmitters absolute are used for applications where pressure is measured relative to a perfect vacuum.

What is the fluid temperature?

Fluid temperature is another important factor to consider when selecting a pressure transmitter.
pressure transmitters are generally designed to operate with liquids, gases or steam within a given temperature range.

The minimum and maximum operating temperature limits of pressure transmitters are an important consideration when selecting a sensor for long-term use.

For high temperatures, you will need to use pressure transmitters at diaphragm seals to keep the sensor electronics away from the process measurement.

What is my measurement range?

The pressure range is the final other element to consider when choosing a pressure transmitter.

The zero and span must be chosen to cover the applicable range without going beyond the upper or lower limit over which you need accurate measurements.

How corrosive is the fluid?

The corrosiveness of the fluid: contaminated, chemically aggressive.
It is important to take into account the corrosiveness of the liquids and gases for which you select a pressure transmitter.
Sensitive materials can be corroded by certain fluids under certain conditions.
This corrosiveness determines the choice of material for parts in contact with the fluid.
This choice has a significant effect on the life of the sensor.
Check the compatibility of the fluid with the materials of construction of your pressure transmitter.

What process connections are planned?

The type of process connection: flanged, threaded, screwed or hygienic is another factor to consider when choosing the right pressure transmitter.

Process connections are available in different types depending on the type of connection required for the application:

• The flanged process connection can be used to achieve high pressure ratings with low pressure drops.
• The threaded process connection is normally used to easily connect hoses, tubes and valves.
• The hygienic process connection guarantees food safety during processing using sanitary designs.

What are the environmental conditions?

The application's environmental conditions: temperature and humidity, explosive atmosphere, dust, EMC, vibrations, safety integrity level ( SIL) are other important factors to consider when choosing a pressure transmitter.

You need to understand how the pressure transmitters will be used, and ensure that they can withstand all potential conditions in their application environment.

You need to know whether your application requires specific types of safety certification and choose a pressure transmitter SIL2 or ATEX, IECEx, etc.

What are the specific requirements of my application?

Application-specific requirements :

• Accuracy, stability and response time are the final important considerations when choosing a pressure transmitter.
  Accuracy and stability are key factors in any process measurement application.
  Sensor accuracy indicates the extent to which the sensor output corresponds to the actual value measured.
  It is affected by many factors, including temperature and static pressure.
  
  
• Response time is a crucial element to consider for a pressure transmitter. It represents the time required for the transmitter to react to a change in pressure. The speed of this response is essential. It can determine how quickly you can make decisions.
  What's more, the responsiveness of the transmitter directly influences your ability to act. So it's an important indicator based on the information provided by pressure transmitter.
  You should consider it for applications where you need instant information.