High-Performance Differential Pressure Without Signal Wiring
The Yokogawa EJX110B is a wireless differential pressure transmitter from the EJX-B series.
It combines Yokogawa's proven pressure measurement technology with ISA100.11a wireless communication, allowing process variables and transmitter setting parameters to be transmitted wirelessly.
This makes the EJX110B particularly useful when installing conventional signal cables would be expensive, time-consuming, or difficult.
The transmitter is suitable for:
- Liquid flow measurement
- Gas flow measurement
- Steam flow measurement
- Liquid level measurement
- Density measurement
- Differential pressure monitoring
- Process pressure applications
Why Choose EJX110B?
Wireless Measurement Where Cabling Is Difficult
One of the biggest advantages of the EJX110B is that it does not require conventional signal wiring between the transmitter and the control system.
This can be valuable when:
- Measurement points are far from existing cable infrastructure
- New process units are being added
- Temporary or additional monitoring points are required
- Cable installation is expensive
- Existing plants have limited cable routes
- Measurement points are located in difficult-to-access areas
By eliminating signal wiring, the EJX110B can help reduce installation work and associated infrastructure costs.
High-Performance Sensing With Single-Crystal Silicon
The EJX110B uses a single-crystal silicon resonant sensor for differential pressure measurement.
This technology is part of Yokogawa's established high-performance pressure transmitter platform and allows the EJX110B to retain the measurement capabilities expected from an EJX-series transmitter while adding wireless connectivity.
Long-Life Battery Operation
The EJX110B is designed for low-power wireless operation.
It uses two high-capacity lithium-thionyl chloride batteries and an ultra-low-current design to support wireless operation for years.
This makes the transmitter practical for locations where providing continuous wired power and communication infrastructure would be difficult.
The dedicated battery pack is rated at 7.2 V and 19 Ah according to Yokogawa's general specifications.
Flexible Wireless Update Rate
Not every measurement point needs the same transmission speed.
The EJX110B allows the process value publishing interval to be selected from 0.5 second to 60 minutes.
This gives users the flexibility to balance measurement responsiveness and wireless power consumption according to the application.
Secure Wireless Network Connection
Wireless industrial instrumentation needs more than simple radio communication.
The EJX110B uses ISA100.11a wireless communication and supports secure wireless network joining.
Yokogawa specifies infrared communication between devices for wireless network configuration and parameter setting, helping simplify commissioning while maintaining controlled network access.
Key Features
- High-performance wireless differential pressure transmitter
- Yokogawa EJX-B series
- Single-crystal silicon resonant sensor
- ISA100.11a wireless communication
- Battery-powered operation
- Two high-capacity lithium-thionyl chloride batteries
- Long-life low-power design
- Wireless transmission of process variables and setting parameters
- Selectable update interval from 0.5 second to 60 minutes
- Secure wireless network joining
- Infrared wireless configuration
- Suitable for liquid, gas, and steam flow
- Suitable for liquid level and density measurement
- Suitable for differential pressure and pressure monitoring
- Optional remote antenna and antenna cable configurations
- Designed for reducing field wiring requirements
Typical Applications
Flow Measurement
The EJX110B can be used for differential pressure-based flow measurement of:
It can be integrated into wireless field instrumentation networks where installing traditional signal cables is inconvenient.
Tank Level Measurement
Differential pressure can be used to determine liquid level in tanks and vessels. Wireless communication is especially useful when the measurement point is located far from existing control-system wiring.
Density Measurement
Differential pressure measurement can also support process density applications where suitable process configuration and installation conditions are provided.
Plant Expansion and Retrofit
The EJX110B is well suited to existing plants where additional measurement points are required but installing new signal cables would involve significant construction work.
Frequently Asked Questions
What is the Yokogawa EJX110B used for?
The EJX110B is a wireless differential pressure transmitter used to measure differential pressure and applications such as liquid, gas, or steam flow, liquid level, density, and pressure.
What makes the EJX110B wireless?
Instead of relying on conventional wired signal communication, the EJX110B transmits measurement data using ISA100.11a industrial wireless communication.
It also operates from an internal battery system, making it possible to install the transmitter without conventional signal wiring.
What is ISA100.11a?
ISA100.11a is an industrial wireless communication standard designed for reliable and secure wireless communication in industrial automation environments.
The EJX110B is compliant with ISA100.11a specifications and can integrate into ISA100-compliant wireless networks.
How long does the EJX110B battery last?
Yokogawa describes the EJX110B as having a long-life battery design using two high-capacity lithium-thionyl chloride batteries and an ultra-low-current design intended for wireless operation for years.
Actual battery life depends on the configured wireless update interval, operating conditions, network environment, and other application factors.
How fast can the EJX110B update its measurement?
The wireless process-value publishing interval can be selected from 0.5 second to 60 minutes.
A shorter interval is useful when faster process updates are required, while a longer interval can be appropriate for slower-changing monitoring applications.
Can EJX110B measure flow?
Yes. The EJX110B is suitable for differential pressure-based measurement of liquid, gas, and steam flow.
Can EJX110B be used for tank level measurement?
Yes. Differential pressure from the transmitter can be used for liquid level measurement. The wireless configuration can be particularly useful when tank measurement points are difficult or expensive to connect with conventional signal wiring.
What is the difference between EJX110B and EJX110A?
The main difference is the communication architecture.
EJX110A is a conventional wired differential pressure transmitter, while EJX110B adds wireless communication based on ISA100.11a and battery-powered operation.
The EJX110B is therefore particularly attractive when reducing field wiring is an important part of the project design.
Can EJX110B transmit transmitter settings wirelessly?
Yes. Yokogawa states that the EJX110B can transmit not only process variables but also setting parameters using wireless communication.
Does EJX110B require external power?
The standard wireless configuration uses a dedicated internal battery pack. Yokogawa's general specifications also list an external DC power option of 10.5 to 30 V DC, depending on configuration.
Is EJX110B suitable for an existing plant retrofit?
Yes. Wireless installation can be particularly valuable for retrofit projects where adding conventional signal cables would require extensive cable tray work, conduit installation, or shutdown-related construction.
The final suitability depends on the wireless network architecture, measurement location, process connection, and site requirements.
Is wireless measurement reliable enough for industrial applications?
The EJX110B is designed specifically for industrial field wireless applications and uses ISA100.11a communication. Yokogawa also provides dedicated wireless network infrastructure and configuration tools for its Field Wireless products.
Where is EJX110B especially useful?
The EJX110B is particularly attractive for:
- Difficult-to-wire measurement points
- Plant expansion projects
- Retrofit applications
- Remote process monitoring
- Tank level monitoring
- Steam flow monitoring
- Utility systems
- Distributed measurement points
