Yokogawa EJA110E Differential Pressure Transmitter
0.055% Accuracy (0.04% Accuracy optional)
0.1% Stability per 10 years
90 ms Response Time
Exida and TUV SIL 2 / SIL3 Certified
MWP 2,300 psi (MWP 3,600 psi option)
Local Parameter Setting (LPS)
The EJA110E with DPharp digital sensor offers the performance needed to run your operations at peak performance. This ensures on-spec product, reduced waste, and improved yield, helping you increase profitability.
Digital Performance
Other pressure sensor technologies require an analog to digital conversion before the signal can be processed, introducing additional errors. In Yokogawa’s pressure transmitters, the DPharp sensor directly outputs a digital signal, eliminating the need for analog to digital conversion and improving performance.
Accuracy Under All Operating Conditions
Fluctuations in static pressure and temperature cause errors in differential pressure measurement. Analog sensors can only measure DP and sensor temperature and therefore can only compensate for temperature effect.
Yokogawa’s DPharp digital sensor measures the differential pressure (DP), static pressure (SP), and sensor temperature from a single sensor. Given these three pieces of process data, our differential pressure transmitters compensate the DP measurement for temperature effect and static pressure effect in real time. This compensation is referred to as Dynamic Compensation and improves DP measurement accuracy.
Stability under all operating conditions
What happens when a transmitter sensor is exposed to overpressure?
Overpressure events such as incorrect sequencing of a manifold during start-up or shutdown and process upsets can damage analog sensors, requiring the transmitter to be recalibrated - or even replaced - in order to return it to normal operations.
The simple, robust design of Yokogawa's DPharp pressure sensor makes it less susceptible to overpressure events. A mechanical system within the transmitter provides additional overpressure protection by equalizing the excessive pressure before it reaches the sensor. Once it returns to normal operating pressure, the transmitter returns to operation within the defined accuracy and stability specifications with no need for recalibration. The Yokogawa DPharp sensor has a more significant operational envelope compared to an analog sensor, allowing you to run your control loop at your desired set-point regardless of process conditions.
EJA110E Specification Overview
| Measurement Types | |
|---|---|
| Primary Variable | Differential Pressure (DP) |
| Secondary Variable | Static Pressure (SP) |
| Reference Accuracy | |
| Primary Variable | ±0.055% of Span |
| Secondary Variable | ±0.5% of Span available |
| Response Time | |
| Primary Variable | 90 msec |
| Secondary Variable | 360 msec |
| Long Term Stability | |
| Primary Variable | ±0.1% of URL per 10 years |
| Over-pressure Effect | |
| Primary Variable | ±0.03% of URL |
| Rangeability | |
| Primary Variable | 100:1 |
The EJA110E reduces total cost of ownership by having safety as standard, extending calibration intervals, and giving users the option to measure both differential and static pressure with one transmitter.
Safety as Standard
At Yokogawa, safety is never an option. All Yokogawa pressure transmitters are designed and certified to IEC61508:2010 Parts 1 through 7 and IEC61511:2004 Parts 1 through 3 by Exida® and TÜV Rheinland®.
As standard, all Yokogawa transmitters are certified for single transmitter use in SIL 2 safety applications and dual transmitter use in SIL 3 safety applications. The same transmitter can be used for both process control and safety applications. Managing two separate transmitter models is no longer necessary, reducing spares inventory and simplifying daily operations.
Extended Calibration Check Intervals
When devices are initially installed, they operate at peak performance, but what happens after they are running under various process conditions and poorly managed or maintained? Changing operating conditions can cause transmitters to drift to the point where they are no longer able to make accurate measurements for the process loop they are installed in, resulting in poor quality or an impact to product yields. This requires a calibration check interval to ensure you’re operating within desired error limits.
Yokogawa EJA-E series pressure transmitters have the long-term stability of ±0.1% per 10 years under all operational conditions, reducing calibration frequencies. As you gain experience with these transmitters, the interval between calibration checks is extended. Long-term this can help reduce your maintenance cost by up to 34%. Spend your time where it is needed.
Multi-sensing in DP Applications
Other suppliers' transmitters use analog sensors, which require two separate transmitters for any application that needs both differential pressure (DP) and static pressure (SP) measurements.
Yokogawa's differential pressure transmitter features our multi-sensing DPharp sensor, which can measure both process variables (DP and SP) with a single transmitter, saving you the cost of a gauge pressure transmitter as well as the manifold, piping, wiring, I/O, construction and engineering man hours associated with it. With our DP transmitter, there are fewer devices to manage, maintain and calibrate, lowering overall lifecycle costs.
Standard Communication Protocol
Yokogawa transmitters support all industry standard field device communication protocols. Interoperability and interchangeability can be ensured. Use all the same tools and work procedures as before. Yokogawa transmitters are available with analog 4 to 20mA signal with either BRAIN® digital protocol or HART® digital protocol; Low Power analog 1 to 5 VDC with HART® digital protocol; or all digital FOUNDATION® Fieldbus or PROFIBUS® PA protocol.
International Certifications
With the rapid globalization of markets, numerous international standards and approvals are becoming necessary. Yokogawa pressure transmitters have acquired various international certifications including FM, CSA, ATEX, IECEx, INMETRO, KOSHA, EAC, and NEPSI.
