What is a Differential Pressure Gauge?
Differential pressure transmitters monitor and communicate the pressure measurements of equipment. Featuring DPharp technology, they deliver accurate, repeatable, and fast-responding measurements. Traditional mount or remote diaphragm seal mount configurations are available.
How Does a Differential Pressure Transmitter Work?
Differential Pressure (DP) transmitters measure the difference between two pressures. They 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. The DP level transmitter reading can be either negative or positive depending on whether the low-side or high-side is the larger value. A DP transmitter can be used as a gauge pressure transmitter if the low-side is left open to the atmosphere.
Digital Differential Pressure Transmitter
As part of a digital transformation, digital differential pressure transmitters can make data-gathering operations more efficient and safe for people.
Common Industrial Applications
- Closed Tank Level
- DP Flow (Secondary Element)
- Filter health
- Density
What are the Different Types of Pressure Measurement?
View the differential pressure meter comparison chart.
EJA110E
High-Performance Differential Pressure Transmitter
EJX110A
High-Performance Differential Pressure Transmitter
EJA118E
Differential Pressure Transmitter with Remote Diaphragm Seals
EJX118A
Differential Pressure Transmitter with Remote Diaphragm Seals
EJA130E
Differential Pressure Transmitter
EJX130A
High Static Differential Pressure Transmitter
EJXC80A, EJAC80E (Differential / Gauge Pressure Diaphragm Seal)
Differential / Gauge PressureDiaphragm Seal System with one or two Diaphragm Seals
EJXC80A, EJAC80E (Differential Pressure Direct Mounted Seal)
Differential Pressure Direct Mounted Seal
EJA120E
Draft Range Differential Pressure Transmitter
EJX120A
Traditional-Mount Draft Range Pressure Transmitter
EJXC40A (DRS)
Digital Remote Sensor (DRS) Transmitter
Details
- Comparison Chart
- Differential Pressure Transmitters Applications
- How Does a Differential Pressure Sensor Work?
Which DP Level Transmitter Series Is Right for You?
 | | ||
| EJA-E Series | EJX-A Series | ||
|---|---|---|---|
| Accuracy | |||
| ± 0.025% | • | ||
| ± 0.040% | • | • | |
| ± 0.055% | • | ||
| Stability | |||
| ± 0.1% of URL per 15 years | • | ||
| ± 0.1% of URL per 10 years | • | ||
| Response Time | |||
| 90 msec | • | • | |
| Safety | |||
| FMEDA Report | • | • | |
| IEC 61508 Certified (SIL 2) | • | • | |
| Multi-sensing | |||
| Differential Pressure | • | • | |
| Static Pressure | • | • | |
How Does a Differential Pressure Transmitter Work?
Differential Pressure (DP) transmitters measure the difference between two pressures. They 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. The DP reading can be either negative or positive depending on whether the low-side or high-side is the larger value. A DP transmitter can be used as a gauge pressure transmitter if the low-side is left open to the atmosphere.
Resources
- Application Notes
- eBooks
- White Papers
- Media Publications
- FAQs
- Articles
Application Note
Reverse Osmosis Filter Monitoring
Overview: The Semiconductor industry usesultrapure water to rinse awaycontaminants from the silicon wafersafter each layer of the fabricationprocess. To ensure effective rinsingafter each step could require thousandsof gallons of water. If the water haseven the slightest impurities, thesemiconductors can potentially becontaminated, leading to scrap wasteand loss of weeks of production. Many industries use reverse osmosis (RO) technology in the water purification process. The importance ofpure water can include public safety, product quality, and reliability of production equipment. An RO systemfunctions by creating a differential pressure across an array of filters. Pressure is applied to thefeed water side of the system to force water through a semi-permeable membrane. The membrane blockscontaminants to allow permeate water to pass through. Industries:
Application Note
Mixing Kettle Reactor Level
Overview: Accurate reactor level measurement enables flow optimization to enhance yield. Industries:
eBook
Pressure Handbook
Overview: Download this eBook and learn:
FeaturedeBook
Excellence in the Clean in Place (CIP) Process
Overview: Read this eBook to learn how to best leverage the latest measurement instrumentation to avoid incidents and improve productivity. You will also find valuable information about overcoming common CIP challenges and stories of success. Industries:
White Paper
Total Insight Enables Digital Transformation at the Edge for Sustainable, Continuous Business Operations Improvement
6.7 MB
Overview: Smart devices, like Yokogawa’s line of Total Insight transmitters and flowmeters contribute to Digital Transformation during operations and throughout the lifecycle of the instrument. Industries:
Media Publication
How to Avoid Temperature Effects in Differential Pressure Level Measurements
(AR-P-20210722-01)
Edition 011
Overview: Overcome Temperature Challenges.Correct common conditions for better level measurement. Industries:
Media Publication
Pressure-Based Measurements Level Challenges
(Podcast)
Overview: Podcast: The benefits of a tried-and-true pressure-based level measurementtechnology. Industries:
Pressure - Low Cut Output Signal
(KB-2019-0002)
Pressure - Low Cut Output SignalWith some applications, the output signal can be erratic as the input nears the zero point. One of the most common applications with this issue is differential pressure flow measurement. A differential pressure (DP) ...
Edition 1
Pressure - Can the high-side and low-side be swapped?
(KB-2019-001)
High/Low SwapSometimes during the rush of installing hundreds of devices, the impulse lines of a DP pressure transmitter can be plumbed to the incorrect ports on the transmitter. This error can go unnoticed even during the proof test stage...
Edition 2
Why use the square root feature in a transmitter?
(Thursday Tip 11)
It is a function ondifferential pressure (DP) transmitters that calculates the process flow using differential pressure readings. It is used on DP applications for flow measurement.
Edition 1
Overview: It is a function ondifferential pressure (DP) transmitters that calculates the process flow using differential pressure readings. It is used on DP applications for flow measurement.
Article
Three Ways Instrumentation Engineers Strengthen Digital Transformation Projects
(AR-P-20210326-02)
5.4 MB
Edition 021
Overview: Get the most from what exists currentlyand take advantage of new methods. Appeared in the March 2021 issue of an ISA.org publication. Industries:
Downloads
- Brochures
Brochures
- Overcome Temperature Effects for DP Level(778 KB)
- Anatomy of a Pressure Transmitter Poster
- Yokogawa Performance Blending Solution
- Yokogawa Performance Distillation Solutions
- Refining Solutions(12.5 MB)
Videos
- Podcasts
Podcast
Pressure-Based Measurements Level Challenges
Overview: Podcast: The benefits of a tried-and-true pressure-based level measurementtechnology.
Podcast
Yokogawa Debunks: Pressure and Level Transmitters
Overview: Is it true that 4-20 mA HART will be phased out in the near future? Is a transducer equal to a transmitter? Tune in to hear the debunking of these myths.
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