Wireless Differential Pressure Measurement for Tank Applications
The Yokogawa EJX210B is a high-performance flange mounted differential pressure transmitter in the EJX-B wireless series. It uses a single-crystal silicon resonant sensor and is specifically positioned for level and density measurement of liquids that may solidify or contain precipitated material.
The flange-mounted configuration makes the transmitter particularly suitable for tanks and vessels where the process connection is located directly on the vessel. Instead of relying on conventional impulse piping, the flange-mounted design provides a direct process interface for differential pressure-based measurement.
Why the EJX210B Is Different
The key advantage of the EJX210B is the combination of flange-mounted measurement and industrial wireless communication.
For applications involving viscous, crystallizing, solidifying or precipitating liquids, conventional impulse lines can create additional maintenance concerns because material may accumulate or solidify inside the piping. A flange-mounted differential pressure transmitter provides a more appropriate configuration for these measurement points.
At the same time, the wireless design avoids conventional signal cabling between the transmitter and control system, which can be particularly useful for tank farms, plant expansions and measurement points where new cables are expensive or difficult to install. Yokogawa's application examples include diesel tank level measurement, chemical plants, gas wells and water treatment facilities.
Key Features
- Wireless flange mounted differential pressure transmitter
- Single-crystal silicon resonant sensor
- Designed for liquid level and density measurement
- Particularly suitable for solidifying or precipitating liquids
- ISA100.11a wireless communication
- Internal battery-powered operation
- Wireless transmission of process variables and setting parameters
- Selectable process-value update interval from 0.5 second to 60 minutes
- Long-life battery design using two high-capacity lithium-thionyl chloride batteries
- Infrared communication for wireless network configuration and parameter setting
- Available flange configurations including flush and extended types
- Measurement spans including 2–400 inH₂O and 20–2,000 inH₂O depending on capsule selection
Flange-Mounted Design for Difficult Liquids
The EJX210B is especially valuable when the process itself creates problems for conventional impulse piping.
Liquids that can crystallize, solidify or precipitate may gradually restrict or block impulse lines. By using a flange-mounted configuration at the vessel, the measurement system can avoid the long impulse piping arrangement typically associated with remote differential pressure installation.
This makes the EJX210B a strong option for applications such as storage tanks, process vessels and chemical systems where reliable level measurement is required despite challenging liquid characteristics.
Wireless Installation Without Conventional Signal Cabling
The EJX210B uses ISA100.11a wireless communication and internal battery power. This allows process measurements to be transmitted without conventional signal wiring to the transmitter.
Yokogawa specifies wireless process-value update intervals from 0.5 second to 60 minutes, allowing users to balance measurement responsiveness and wireless power consumption according to the application.
The transmitter can also transmit setting parameters wirelessly. Infrared communication is used for wireless network configuration and parameter setting, helping simplify commissioning and device configuration.
Typical Applications
Tank Level Measurement
The EJX210B is particularly suitable for differential pressure-based tank level measurement. Its flange-mounted design is useful when the process connection is directly integrated into the vessel.
Solidifying or Precipitating Liquids
Applications involving liquids that can solidify, crystallize or precipitate are one of the main reasons to consider the EJX210B. The flange-mounted configuration helps avoid some of the problems associated with conventional impulse piping.
Density Measurement
Differential pressure can also be used to determine liquid density when the process arrangement and measurement conditions are suitable. Yokogawa specifically lists density measurement among the intended applications.
Tank Farms and Distributed Monitoring
Wireless communication makes the EJX210B useful for distributed tank measurement, especially where many measurement points are spread across a facility and installing additional signal cables would be costly.
Plant Expansion and Retrofit
Because conventional signal wiring is not required at the transmitter, the EJX210B can simplify the addition of new measurement points during plant expansion or retrofit projects. Yokogawa's application examples include diesel tank monitoring and wireless pressure/level monitoring in industrial facilities.
Frequently Asked Questions
What is the Yokogawa EJX210B used for?
The EJX210B is primarily designed for liquid level and density measurement using differential pressure. It is particularly suitable for liquids that may solidify or precipitate, where conventional impulse piping can be problematic.
Why use a flange-mounted differential pressure transmitter?
A flange-mounted transmitter can connect directly to a tank or vessel through a suitable flange connection. This is especially useful when conventional impulse lines may become blocked, restricted or difficult to maintain because of the process medium.
What type of liquids is the EJX210B suitable for?
Yokogawa specifically identifies solidifying or precipitating liquids as an important application area. The exact flange, diaphragm and process configuration should be selected according to the medium, temperature, pressure and vessel design.
Is the EJX210B wireless?
Yes. The EJX210B uses ISA100.11a wireless communication and operates using internal batteries. It can transmit process variables and setting parameters through the wireless network.
How fast can the EJX210B update its measurement?
The measured process value can be published wirelessly at selectable intervals from 0.5 second to 60 minutes.
Does the EJX210B need signal cables?
The transmitter does not require conventional signal cabling to transmit its measurement data because it uses ISA100.11a wireless communication. A compatible wireless infrastructure is still required for the complete system.
What is the difference between EJX210B and EJX110B?
Both are wireless differential pressure transmitters using the EJX-B wireless platform, but their mechanical configurations and primary applications differ.
The EJX110B is a general wireless differential pressure transmitter for liquid, gas and steam flow, liquid level, density and pressure measurement. The EJX210B is a flange-mounted configuration specifically suited to level and density measurement, particularly for solidifying or precipitating liquids.
What is the difference between EJX210B and EJX118B?
The main difference is the process connection arrangement.
The EJX118B uses remote diaphragm seals connected to the transmitter through capillaries and is intended for applications where process isolation and remote seal installation are required.
The EJX210B is a flange-mounted differential pressure transmitter, making it particularly suitable for direct tank or vessel level applications involving solidifying or precipitating liquids.
Can the EJX210B be used for tank level measurement?
Yes. Tank level measurement is one of its key applications. Yokogawa also provides application examples involving oil level measurement in diesel storage tanks.
Can the EJX210B measure density?
Yes. Differential pressure measurement can be used for density measurement, and Yokogawa specifically identifies density measurement as an application for the EJX210B.
How is the wireless network configured?
The EJX210B uses infrared communication for wireless network configuration and parameter setting. This helps simplify the process of joining and configuring the wireless network.
Is the EJX210B suitable for retrofit projects?
Yes. The wireless architecture can be useful when additional measurement points need to be installed without running new signal cables over long distances. This can reduce installation work in existing plants and tank farms.
