What is a pressure transmitter?
A pressure transmitter also often called a pressure transducer. A pressure transmitter is a device used to measure the pressure of liquids or gases in pipes or containers. It works by converting the pressure readings into an electrical signal that can be easily transmitted to a control system for monitoring and analysis.
These devices are commonly used in industrial settings, such as in manufacturing plants and refineries. Where it’s important to monitor the pressure of gases and liquids flowing through pipes and containers to ensure that they’re at safe levels.
Pressure transmitters can measure pressure in gases, liquids, air or oil. Widely used in various industrial processes. Such as pharmaceutical industry, chemical feed, waste water industry, food industry, farms, etc.
Overall, pressure transmitters are essential tools for measuring and monitoring pressure levels in various settings, helping to keep people and equipment safe and functioning properly.
In order to choose a suitable pressure transmitter, we must understand what types of pressure transmitters are there, what are the functions of pressure transmitters, and how do pressure transmitters work? Read on to find out the answers below.
Types of Pressure Transmitters
According to different measurement media, pressure transmitters can be divided into liquid pressure transmitters and gas pressure transmitters.
According to the measurement conditions, the pressure transmitter can have a high temperature type, a very low temperature type, and a high pressure type.
Here we divide by the type of pressure measured.
|Type of Pressure Transmitter||Characteristics/Principles|
|Absolute Pressure Transmitter||– Measures pressure relative to atmospheric pressure|
– Can only measure positive pressures
|Gauge Pressure Transmitter||– Measures pressure relative to atmospheric pressure|
– Can only measure positive pressures
|Differential Pressure Transmitter||– Measures the difference between two pressures|
– Can measure both positive and negative pressures<br>- Used to measure flow rates
|Vacuum Pressure Transmitter||– Measures pressure below atmospheric pressure|
– Can only measure negative pressures
– Used to maintain vacuum in a process
|Hydrostatic pressure transmitters||– Often called level transmitters. Because of their working principle and ability to measure level.|
– Hydrostatic pressure transmitters work on the basis that the amount of pressure increases with depth.
– These devices are submersible and can be used for liquids and gases.
Featured Pressure Transmitters
Pressure Transmitter Working Principle
A pressure transmitter is a device that measures the pressure of fluids or gases in a process and converts it into an electrical signal that can be used for monitoring or control purposes. There are several different working principles that pressure transmitters use to accomplish this:
Video source: https://www.youtube.com/embed/QrT8VWxdxwk?rel=0
Read more about: How does a differential pressure transmitter work
Pressure transmitter signal output
There are three common signal outputs that pressure transmitters provide: millivolt, amplified voltage, and 4-20mA.
Below is a summary of the outputs and when they are best used.
This type of output signal is a low-level voltage signal that is proportional to the pressure being measured. The signal typically ranges from 0-50mV or 0-100mV, depending on the specific pressure range being measured.
This type of output signal is usually used in applications where the signal needs to be amplified or converted to a different format before it can be used by the control system.
Amplified Voltage Output:
This type of output signal is a higher-level voltage signal that has been amplified to a specific range, such as 0-5V or 0-10V.
The voltage signal is proportional to the pressure being measured and can be used directly by the control system without the need for additional signal conditioning.
Amplified voltage output signals are commonly used in applications where the control system requires a voltage input signal.
This type of output signal is a current signal that ranges from 4mA at zero pressure to 20mA at the maximum pressure being measured.
This type of signal output is popular because it is immune to electrical noise and can be transmitted over long distances without signal degradation.
4-20mA output signals are commonly used in industrial applications where the control system requires a current input signal.
The choice of signal output will depend on the specific requirements of the application, such as the distance between the pressure transmitter and the control system, the required accuracy and resolution, and the environmental conditions.
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Read more about: What is industrial pressure transmitter?
How to Choose Pressure Transducer
There are multiple types of pressure transducers for a variety of applications.
Each pressure transducer has different aspects, that will impact how it works and the applications the pressure transducer works best for.
When selecting a pressure transducer, keep these 6 criteria in mind:
- Application and measurement type
- Pressure range
- Process media
- Temperature range and installation environment
If you still don’t know how to choose the pressure transmitter, please contact our sales engineers.
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Pressure Transducer Price
There are a number of factors, that will impact the price of a pressure transducer.
The biggest differentiator is whether you can use a standard, off-the-shelf pressure transducer or if you need a custom pressure transducer.
For an off-the shelf pressure transducer, pressure transducer prices will be most affected, by the level of accuracy required for your application.
The more accurate, typically the more expensive the pressure transducer.
Extended reading: What is a pressure sensor?
Choose the right pressure transducer for your application
Sino-Inst offers over 20 Pressure Transmitters. A wide variety of Pressure sensors options are available to you. Such as free samples, paid samples. Sino-Inst is a globally recognized manufacturer of Pressure sensors, located in China.
Sino-Inst sells through a mature distribution network that reaches all 30 countries worldwide. Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.
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