Are costly wiring runs preventing you from monitoring critical pressure points on rotating equipment, remote tank farms, or existing infrastructure? Do you need the high performance of a wired transmitter without the installation expense? Yokogawa's wireless differential pressure transmitters (EJX-B series) combine the proven accuracy of our thoroughbred EJX-A series sensor technology with the freedom and flexibility of ISA100 wireless communication. This powerful combination delivers new opportunities for data acquisition, enabling you to monitor applications previously considered impractical or too expensive.

Why Choose Yokogawa Wireless Pressure Transmitters? Solving Accessibility & Installation Cost Challenges

Gain process insights from anywhere with intelligent wireless features that directly address common industrial pain points.

• Eliminate Wiring Costs for Remote or Moving Assets: Installing cable to rotating equipment like kilns or dryers is difficult, expensive, and prone to failure. A Yokogawa wireless differential pressure transmitter eliminates this problem entirely. It establishes reliable communication with a gateway, allowing you to collect critical pressure data from moving machinery without slip rings or complex cabling, as highlighted in their rotating equipment application.

• Deploy Quickly and Cost-Effectively: Need to add monitoring points to an existing plant or a temporary test setup? With ISA100 wireless communication, there is no need for trenching, cable trays, or conduit. The simple equipment implementation means you can deploy wireless pressure transmitters in a fraction of the time of wired instruments, minimizing potential disruption to operations and reducing project costs dramatically.

• Long-Life Power for Unattended Operation: Battery replacement in remote locations is a hidden cost and logistical headache. These transmitters feature long-life lithium-thionyl chloride battery packs, with a typical battery life of 10 years at a 60-second update rate (or 4 years at a 10-second update rate). For intrinsically safe applications, the battery pack is even replaceable in hazardous areas, ensuring continuous, reliable operation.

Key Features for Demanding Industrial Applications

Engineered for longevity, precision, and seamless wireless integration:

• Proven Sensor Technology: At the core is the same single crystal silicon resonant sensor found in the renowned EJX-A series, ensuring high accuracy (e.g., ±0.2% of span for absolute pressure) and excellent long-term stability.

• Robust & Secure Wireless Protocol: Built on the ISA100.11a protocol, these devices offer reliable, self-healing mesh networking. Communication is secured with AES 128-bit encryption and operates in the license-free 2.4 GHz ISM band.

• Comprehensive Model Range: The EJX-B series includes variants for virtually every pressure application:

• EJX110B: Wireless Differential Pressure Transmitter for flow, level, density.

• EJX118B: Wireless Differential Pressure Transmitter with Remote Diaphragm Seals for corrosive or hot processes.

• EJX210B: Wireless Flange Mounted Differential Pressure Transmitter for solidifying or precipitating liquids.

• EJX310B / EJX430B: Wireless Absolute and Gauge Pressure Transmitters.

• EJX510B / EJX530B: Wireless In-Line Mount Absolute and Gauge Pressure Transmitters.

• Harsh Environment Rating: Built to withstand tough conditions with IP66/IP67 and NEMA4X protection and an extended ambient temperature range of -40°C to 85°C.

Technical Specifications at a Glance

Wireless Communication

• Communication Protocol: ISA100.11a

• Frequency: 2.400 – 2.4835 GHz (License-free ISM band)

• Data Rate: 250 kbps

• Radio Security: AES 128-bit encryption

• RF Transmitter Power: Max. 11.6 dBm (fixed)

• Antenna: +2 dBi Omni-directional monopole (Remote antenna options available)

• Regulatory Compliance: FCC, IC, R&TTE (ETSI EN 300 328, EN 301 489)

Performance Specifications

• Measurement Types: Differential Pressure, Gauge Pressure, Absolute Pressure, Flange Mounted Level

• Accuracy (Absolute Pressure): ±0.2% of span (for 1 MPa or higher ranges)

• Update Time: User-selectable from 0.5 to 3600 seconds

• Sensor Technology: Single crystal silicon resonant sensor

Power Supply

• Battery Type: Long-life lithium-thionyl chloride

• Battery Life:

• 10 years typical (at 60-second update time, 23°C, IO mode, LCD off)

• 4 years typical (at 10-second update time, same conditions)

• Feature: Intrinsically safe battery pack replaceable in hazardous area

Environmental & Mechanical

• Ingress Protection: IP66/IP67, NEMA4X

• Ambient Temperature Limits:

• Operation: -40°C to 85°C (-40°F to 185°F)

• LCD Visible Range: -30°C to 80°C (-22°F to 176°F)

• EMC Conformity: EN61326-1 Class A, Table 2 (Industrial locations)

• Safety Standards: EN61010-1, EN61010-2-030

• Explosion Protection: ATEX, FM, CSA, IECEx Intrinsically Safe approvals available

Ready to Unlock New Monitoring Possibilities Without the Wiring?

Whether you need to monitor rotating equipment, extend your network to a remote tank farm, or quickly deploy temporary measurement points, Yokogawa's wireless differential pressure transmitters deliver the data you need with the reliability you expect.