Pressure Transmitter

How a pressure transmitter works 

A pressure transmitter (often referred to as a pressure transducer or pressure sensor) is an instrument that converts a physical pressure into a standardised electrical signal, usually 4-20 mA or a digital fieldbus protocol. The process takes place in three steps: sensing → signal conversion → signal conditioning/transmission. Put simply: 

1. The sensing element (e.g. a thin metal or silicon membrane) deforms proportionally to the applied pressure.  
2. The deformation changes an electrical property - most commonly resistance (thin film or diffusion resistors in a Wheatstone bridge), capacitance or piezoelectric charge.  
3. The electronics measure this change, compensate for temperature effects, linearise the signal and send out a calibrated output signal (e.g. 4 mA at 0 % span → 20 mA at 100 % span).  

Why choose Omniprocess for pressure transmitters? 

With a wealth of experience and expertise in pressure measurement, we can offer: 

• High-precision technology: All our products have outstanding accuracy and stability to ensure reliable measurements. 

• Customisable solutions: From standard models to customised systems for specific needs. 

• Customised support: We help you with needs analysis, design, installation and maintenance. 

Explore our range of pressure transmitters 

EJA310E - Absolute pressure transmitter 

This traditionally mounted absolute pressure transmitter is ideal for applications that require high stability and fast response time. 

• Accuracy: ± 0.1 % 

• Stability: ± 0,2 % over 10 years 

• Response time: 90 ms 

• Communication protocol: HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN 

• Maximum overpressure capacity: 3 600 psia 

EJA430E - Relative pressure transmitter 

Ideal for measuring relative pressure in processes that require high precision and reliability. 

• Accuracy: ± 0.055 % (0.04 % selectable) 

• Stability: ± 0.1 % per 10 years 

• Response time: 90 ms 

• Communication protocol: HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN 

EJA440E - High pressure transmitter 

Specifically designed for high pressure applications where robustness and accuracy are essential. 

• Accuracy: ± 0.055 % 

• Stability: ± 0.1 % per 10 years 

• Response time: 90 ms 

• Communication protocol: HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN 

EJA510E - In-line absolute pressure transmitter 

A reliable solution for applications that require accurate absolute pressure measurement. 

• Accuracy: ± 0.055 % (0.04 % selectable) 

• Stability: ± 0.2 % per 10 years 

• Response time: 90 ms 

• Maximum overpressure capacity: 8 700 psia 

• Communication protocol: HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN 

EJX series - the premium option 

Designed for demanding applications, our EJX series combines state-of-the-art technology with superior performance. 

• EJX430A - Relative pressure transmitter: 

• Accuracy: ± 0.04 % (0.025 % selectable) 

• Stability: ± 0.1 % per 15 years 

• Maximum overpressure capacity: 15 200 psi 

• EJX510A - Absolute pressure transmitter: 

• Accuracy: ± 0.04 % 

• Maximum overpressure capacity: 10 800 psig 

• EJX630A - High performance gauge pressure transmitter: 

• Accuracy: ± 0.04 % (0.025 % selectable) 

• Stability: ± 0,1 % over 15 years 

• Response time: 90 ms 

How to choose the right pressure transmitter? 

When selecting a pressure transmitter, it is important to take into account factors such as: 

• Measurement range and accuracy: Does the model fit your requirements? 

• Material: The blanks must withstand your process conditions. 

• Communication: Do you need HART, FOUNDATION Fieldbus or PROFIBUS? 

• Environment: Can the product withstand extreme temperatures or pressures? 

Our experts are here to help you through the whole process - from needs analysis to installation and maintenance. 

Contact us today! 

Do you need a pressure transmitter that delivers the highest precision and performance? Contact us at Omniprocess for advice and a quote. We will help you find the optimal solution for your needs.