Yokogawa Differential Pressure Transmitter

Yokogawa Differential Pressure Transmitter

The EJX differential pressure sensors provide a 4–20 mA current output proportional to the differential pressure. Additionally, this transmitter, with its highly accurate and stable sensor, can measure static pressure, which can be displayed either on the local indicator or on remote indicators via the BRAIN or HART network.

Other key features of the EJX series differential pressure transmitter include a fast sensor response, wireless communication capability with the sensor via a network, built-in diagnostics, and the ability to modify output functions. These are among the main advantages of the YOKOGAWA EJX transmitter.

The use of multi-sensor technology allows for excellent detection and diagnostics of anomalies such as severe line shocks caused by blockages or thermal failures in the pipeline.

The networks supported by this product include Fieldbus and Profibus PA.

All EJX series differential pressure transmitters, except for those with Fieldbus and Profibus PA capabilities, are TÜV-certified with SIL 2 approval for high-safety applications.

The outputs of the mentioned transmitter include the following:

The 2-wire 4–20 mA current output of this transmitter can be transmitted and converted to BRAIN or HART FSK networks.

The actual current output range of the EJX transmitter is 3.6–21.6 mA. The 21.6 mA corresponds to 110% of the maximum range to indicate device over range, while 3.2 mA corresponds to –5% of the minimum range to signal an error or fault. However, the standard output range for the EJX series differential pressure transmitter is 3.8–20.5 mA.

The update time for the DP transmitter output is 45 ms for differential pressure and 360 ms for static pressure.

The display of the EJX series transmitter is a 6-digit unit, which can be configured to periodically show one to four data points, including:

1 – Differential Pressure

2 – Differential Pressure as a %

3 – Scaled Differential Pressure

4 – Static Pressure

Overall, compared to other flow and pressure measurement methods, which are often very expensive, this method is an optimal, cost-effective solution. Due to the absence of moving parts, it also offers a long mechanical lifespan.