What is a Pressure Transducer？

Pressure transducers generally convert the pressure exerted by an external force or fluid into an electrical output signal that sends to the controller unit for interpretation. In smart cities and industrial production, pressure transducers are quite essential, which is why they are widely used.

Monitoring liquid and gas pressure through pressure transducers and pressure transmitters can provide data for industrial production automation and ensure more convenient and safer use of water, oil, and gas in smart cities.

How Does A Pressure Transducer Work？

The measured medium transmits the pressure to the diaphragm at the front end of the pressure transducer, causing the diaphragm to deform after being pressed, and then transmit the pressure step by step to the pressure measuring chip. Different pressures will cause different degrees of deformation of the chip. Due to the piezoresistive effect, the resistance value output by the diffused silicon pressure transducer will change. The electronic circuit is used to detect this change and convert and output a standard measurement signal corresponding to this pressure.

What are the Main Components of a Pressure Transmitter?

Pressure transducers usually consist of the following three elements:

• Pressure Sensing Element: The core component of the pressure transmitter that is used to sense the pressure of the medium.

• Signal Conversion Circuit: Converts the original pressure signal into a standard electrical signal.

• Process Connection: Allows the transmitters to be connected to the process system where pressure measurement is required.

What Media Can the Pressure Transducer Measure?

The pressure transducer is selected according to the different measurement media, which can be divided into dry gas, gas-liquid, strong corrosive liquid, viscous liquid, high-temperature gas-liquid, etc. Correct selection according to different media will help extend the transmitter service life.

Depending on the medium, there are usually different names:

• Gas pressure transducer

• Water pressure transducer

• Hydraulic pressure transducer

• Oil pressure transducer

•  Fuel pressure transducer

What Are The Commonly Used Units for Pressure Transducers to Measure Pressure?

Common pressure units for pressure transducers include MPa, kPa, bar, psi, kilo, etc. These units are very common in practical applications. There is a clear conversion relationship between them.

1MPa=1000kPa=10bar=1000mbar=10kilo ≈145psi

MPa is frequently utilized for higher range pressure thanks to its larger value. One bar is equal to the earth's atmospheric pressure at sea level, about 14.6 PSI.

What Are The Output Signals of The Pressure Transducer?

A pressure transducer generates an electrical output signal proportional to the pressure when connected to an electrical source and a pressure source. The output signal can be digital or analog. Usually, the pressure transducer is powered by a DC power supply and provides a variety of output signal options, including 4~20mA DC, 0~5V DC, 1~5V DC, 0~10mA DC, etc., can have 232 or 485 digital outputs.

How Do Diffused Silicon Pressure Transducers Work?

The measured medium transmits the pressure to the diaphragm at the front end of the pressure transducer, causing the diaphragm to deform after being pressed, and then transmit the pressure step by step to the pressure measuring chip. Different pressures will cause different degrees of deformation of the chip. Due to the piezoresistive effect, the resistance value output by the pressure transducer will change. The electronic circuit is used to detect this change and convert and output a standard measurement signal corresponding to this pressure.

How Is a Pressure Transducer Installed?

The pressure transducer is usually installed with thread on the pipeline and storage tank to be measured. The signal can be read through the Hirschmann interface, plug interface, or direct wiring, and wireless remote transmission signals are optional.

There are options for direct wiring as well as wireless remote transmission signals. The pipe's orientation and the pressure media (steam, liquid, or gas) will determine the method of installation of the pressure transducer along with its positioning. Make sure you enlist a professional with hands-on experience to handle your pressure transducer installation. 

What Are the Types Of Pressure Transducers?

Pressure transducers are usually divided into three types: absolute pressure, gauge pressure, and sealed gauge pressure. According to the measurement purpose, it can be divided into general pressure transducer and differential pressure transducer.

Pressure transducers can also be classified based on measurement technology into strain gauge pressure transducers and capacitance pressure transducers. There are also potentiometric pressure transducers, resonant wire pressure transducers, piezoelectric pressure transducers, and inductive pressure transducers. 

How to Select Pressure Transducers?

Pressure transmitters now support wireless technologies, making them applicable to critical operations that were impossible before. The devices are now utilized as pressure sensors in pharmaceutical industries, engine test setups, mining industries, and for preventative maintenance in high-flow fluid lines. 

When selecting a pressure transducer, the following parameters need to be confirmed:

•  The medium to be measured and the temperature of the medium

•  Measuring range

•  Accuracy

•  Pressure ports

•  Output signal

•  Working environment temperature, etc.

What Certifications Does MicroSensor Pressure Transducer Have?

MicroSensor's pressure transducer has obtained multiple international certifications, including ATEX explosion-proof, CB, CE, DNV certifications, UL, 3A, IECEX, CSA, RoHS, etc. The significance of these certifications is to ensure the quality and safety of the product and make it meet the relevant international and regional standards and requirements.

CE certificated means that MicroSensor has a "passport" to enter the European market. ATEX certification indicates that the pressure transducer meets European explosion protection standards and is suitable for hazardous environments. UL certification indicates that the product meets US safety standards. DNV certification makes MicroSensor products for ship use. In addition, certifications such as CSA and IECEx further prove the product's ability to be used in complex environments. These certifications provide a solid foundation for MicroSensor expansion in the global market.