Pressure Transmitters

Pressure transmitters are used to measure the pressure or level of industrial liquids and gases. The output is transmitted to a control system. Accurate and stable process measurements ensure the safe, reliable, and profitable operation of your plant.

Compact, lightweight, intuitive and intelligent, Yokogawa pressure instruments simplify all aspects of handling, commissioning, installation, operation, and maintenance while delivering outstanding performance. Whether installed in the harsh environment of an offshore platform or a refinery in the burning desert heat, our DPharp series delivers accurate, repeatable, and high integrity process measurements.

Learn more about Pressure Transmitters.

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DPharp Pressure Transmitters Comparison Table
Sustainability

Gauge Pressure

Gauge Pressure transmitters compare a pressure relative to atmospheric measure.
Differential Pressure

Differential Pressure (DP) is defined as the difference between two pressures. Differential Pressure Transmitters use a reference point called the low-side pressure and compare it to the high-side pressure. Ports in the instrument are marked high-side and low-side.
Absolute Pressure

Absolute Pressure transmitters compare a pressure relative to Absolute pressure. Absolute pressure is always a positive value.
Wireless Differential Pressure/Pressure Transmitters

Yokogawa offers a complete line of ISA100 compliant pressure transmitters. The line includes transmitters that can measure differential pressure, absolute pressure, and gauge pressure.
Liquid Level

Accurate level readings are essential to the safe, reliable, profitable operation of your plant. Liquid Level transmitters measure differential pressure to infer the level in a vessel.
Mass Flow (Multivariable)

There are several technologies on the market to measure mass flow. One is the Multi-variable Pressure Transmitter.
Draft Pressure

Draft Pressure transmitters are a unique type of differential transmitter that is designed to measure small differences in very low static pressure environments.
- EJA120E
- EJX120A
Low Flow

Using Bernoulli's equation, Differential Pressure transmitters can be used to infer the flow of fluid through a pipe.
- EJA115E
- EJX115A
Partner Products for Pressure Transmitters

Yokogawa Partner Products for Pressure Transmitters
- Badotherm - Remote Seals
- WIKA - Remote Seals
Product Finder

This web tool makes it easier to find products according to the application, measurement conditions and required specifications.

Yokogawa have been manufacturing electronic pressure transmitters for more than four decades. We revolutionized the industry and set a new standard for pressure measurement with the introduction of the DPharp digital sensor in 1991. The superior performance of the new technology enabled exponential market expansion. Yokogawa continues, the digital evolution with the enhancement of our DPharp family to deliver best in class pressure measurement solutions to our esteemed customers.

Pressure Transmitter Technology Evolution

Timeline of Yokogawa's Pressure Sensor Advances.

DPharp Pressure Transmitters EJX Series/EJA Series Comparison Table

Refer to the general specifications on each product page for detailed specifications.

Accuracy
	EJX-A Series	EJA-E Series
± 0.025%	●
± 0.040%	●	●
± 0.055%		●
Stability
± 0.1% of URL per 15 years	●
± 0.1% of URL per 10 years		●
Maximum Working Pressure
250 bar	●	●
160 bar		●
Turn down
200 : 1	●
100 : 1		●
Multi sensing
DP, SP	●	●
Safety
FMEDA report	●	●
IEC61508 Certified	●	●
Response Time
< 90 msec	●	●
User Linearisation
10 points signal characteriser	●	●
FF Function Blocks
AI (Analog Input)	●	●
PID (PID control)	●	●
Other *	●	●
FF Link master
Standard	●	●
Advanced Diagnostics
Impulse line blockage detection	●
Heat trace monitoring	●
Alarm output
Contact output	●
Multi-Variable
DP, SP, PT, Q_V and Q_M	●
Wireless Communication
ISA100.11a	●

* Other FB include SC (Signal Characteriser), IT (Integrator), AR (Arithmetic) and IS (Input Selecor).

Pressure Transmitter Initiatives

Based on YOKOGAWA "Trusted Green" sustainability guidelines for the product lifecycle, we strive to ensure the sustainable and stable operation of our customers' plants with our differential pressure transmitters.

Trusted Green
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Product Lifecycle	Initiatives Related to the Environmental Contribution of Products	Pressure Transmitter Initiatives
Design	Carbon footprint	Pressure transmitters are designed using LCA (Life Cycle Assessment), and their environmental impacts are calculated and reduced compared to previous models. Pressure transmitters are accompanied by product manuals that are being shifted from paper to web publication, contributing to the reduction of environmental impact.
Procurement	Sustainable materials	Pressure transmitters are finished with powder coating as part of ongoing efforts to reduce VOC (volatile organic compound) emissions. Pressure transmitters are built with materials and parts prioritized for low environmental impact, based on the YOKOGAWA Green Procurement Guidelines.
Production	Environmental risk management	Pressure transmitters are designed and managed in compliance with domestic and international environmental regulations (RoHS, REACH, etc.), with hazardous substances thoroughly controlled and environmental impact reduced.
Production	Carbon footprint	Pressure transmitters are manufactured under the NYPS (New Yokogawa Production System), with production volumes leveled and the entire manufacturing process improved, while inventory disposal is minimized. Pressure transmitters are manufactured with continuous efforts to reduce CO₂ emissions (Scope 1 and 2) through factory-level energy‑saving initiatives.
Logistics	Carbon footprint	Pressure transmitters are packaged using materials that are under review, and the amount of plastic used in product packaging is being reduced.
Usage	Longebility	Pressure transmitters are being continuously improved to increase mean time between failures (MTBF). Pressure transmitters are enhanced for long‑term stability, and the frequency of periodic calibration is reduced.
	Repairbility	Pressure transmitters are supported with information on replacement parts, and repairability is being improved.
	Maintainability	To enhance maintainability, pressure transmitters are designed to allow on-site tasks—such as loop testing, tag changes, and range adjustments—to be performed without the use of dedicated tools. For efficient maintenance and troubleshooting, pressure transmitters support diagnostics and configuration using a variety of tools, including FieldMate. Throughout the product lifecycle, pressure transmitters are supported by maintenance manuals, calibration certificates, material certificates, and other relevant documentation provided via the member portal site, contributing to improved maintainability.
End of Use	Lifecycle management	Pressure transmitters are continuously being redesigned to shorten disassembly time. By continuously reviewing packaging methods, the ease of processing packaging materials is being improved.
The Entire Lifecycle	Goal setting and management system	Pressure transmitters are designed and managed based on Yokogawa’s Trusted Green guidelines and our own standards.