Yokogawa EJXC40A Digital Remote Sensor (DRS) Differential Pressure System

The EJXC40A Digital Remote Sensor (DRS) transmitter connects two pressure sensors, the master sensor (for high-pressure side) and remote sensor (for low-pressure side) with DRS dedicated communication cable to measure differential pressure. The DP is transmitted via a 4 to 20 mA analog signal. EJXC40A is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure.

Key Features

  • High performance, high accuracy and high reliability
    Better performance over long capillaries of diaphragm seal system.
  • Suitable for level measurement of a tall tank
    DRS cable length (maximum): 45 m
  • Signal characterization for various tank types

Exida SIL 2 / SIL3 Certified

EJXC40A Differential Pressure Digital Remote Sensor (DRS) Overview

Plants run better with Yokogawa differential pressure transmitters.

At it’s heart, Yokogawa’s differential pressure transmitter with DPharp digital sensor offers the performance and device intelligence needed to get greater insight into your process.


Digital Performance

Digital Performance


Yokogawa’s DPharp digital sensor offers twice the performance and stability of the competitor’s analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistentreliableaccurate measurement you need.

Poor Performance = Lost Money



EJXC40A Digital Remote Sensor (DRS) - More InformationMore Information

Yokogawa’s DRS Pressure System offers greater insight into your process. One DRS can supply differential pressure (primary variable), high-side pressure, high-side sensor temperature, low-side pressure, and low-side temperature.

More Information = Found Money






Signal Characterization

Signal Characterization


Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points.

Greater Flexibility = Found Money



Local Indicator

Local IndicatorAll of the process variable’s measured by Yokogawa’s transmitter can be displayed on the easy to read local indicator. The indicator can display any of the variables measured (DP, SP, Capsule temperature); alarm codes with short text; and a sweeping bar graph to give a graphical representation of the process. Fully programmable, the indicator is customizable for your needs. Unlike competitor’s transmitters, the indicator is not driven off the 4 to 20 mA analog signal, but, exist on a separate circuit. This allow the display to operate independently from the output signal, so it can indicate information that maybe more useful at the transmitter location.

More information = Found Money

Standard Diagnostics

Yokogawa’s transmitter has 40 self-diagnostic checks to ensure that everything is running smoothly within the transmitter. But, all transmitters on the market have a level self-diagnostic checks. However, Yokogawa has two that are not offered by competitors. First, the transmitter features a patented Back-check Technology that reverse checks all calculations in real-time. Second, the DPharp sensor is an active sensor. This means that the sensor is constantly supplying a signal even when the process has not changed. If the signal is lost from the sensor, the transmitter knows there is an issue. Competitor’s analog sensors are passive. They do not supply a continual signal, so, is the sensor still working when there is no signal?

Good Diagnostics = Less Surprises