Product Review: Yokogawa EJA530E
As I scrolled down my LinkedIn timeline, I came across an interesting post from Hugo Garcia of Yokogawa. The video explained a feature of one of the big Y’s product to be precise it was a Yokogawa pressure gauge, so I decided to review this product here at Visaya.
I still need to find a competitor for it, but this review will give you some insight into the product and its technology. Yokogawa is a big player in the instrumentation world, right next to brands like Emerson, Endress+Hauser, and ABB.
With no more ado, today we have the Yokogawa EJA530E, an in-line mount gauge pressure transmitter! Let’s dive into the parameters and find out the pros and cons. Stay with me, and we’ll see how it can fit a new application!
Disclaimer: This product review examines only features, not performance. If you’ve used this device, feel free to share your experience in the comments.
Whatcha got there?
The EJA530E comes from the low budget end of the Yokogawa pressure gauge line. The first impression after unboxing is “yep, Yokogawa device,” which is fine because it creates familiarity. In general, you won’t find anything special in pressure device design. Okay, sometimes you’ll see a device looking a little different, but not often.
Anyway, it has an optional local display which shows values, units, and bar graphs. You can set up the display to cycle through three items. Furthermore, you have the option of setting up the Yokogawa EJA530E locally, and this point caught my attention.
The device has a feature called local parameter setting (LPS). It combines push-button navigation with an external adjustment screw to pick units, measuring ranges, and more.
You can integrate it into your system using a nice array of field protocols: analog+Brain (proprietary), analog+HART, FOUNDATION Fieldbus, PROFIBUS PA, and a few others.
What can it do?
This Yokogawa pressure gauge will measure as it says in the name, gauge pressure, and you can use it in plenty of applications. If you don’t know the difference among absolute, gauge, and differential pressure, then find out here. If you need a different measurement, then Yokogawa offers the EJA510E for absolute pressure and the EJA110E for differential pressure.
Although the Yokogawa EJA530E is not a high-end device, it has enough accuracy (+- .055 percent) for a broad range of pressure applications. It also has a stability of +-0.1 percent per 10 years – not bad at all!
Want more numbers? Okay. It can work in temperatures from -40 to 120 degrees Celsius, and for pressure, you can select capsules A, B, C, or D. Capsule A goes up to 29 pounds per square inch gauge (psig), B to 290 psig, C to 1500 psig, and D to 7200 psig.
The manual will tell you the maximum over-pressure limit supported by each capsule. Also, capsules A, B, and C have a rangeability of 20 to 1 and D 10 to 1. This graphic shows the information from capsule D.
On Yokogawa’s website, you can find all kinds of graphics with details on reliability, maintenance, accessories, and so on.
Why should I care?
The Yokogawa EJA530E offers good flexibility for its portfolio status. It also has an exciting diagnostic we’ll talk about in a minute, but first, let’s do approvals and certification.
It comes with the labels explosion-proof, flameproof, intrinsically safe, and a few others you may need. You can see the entire list on the official site or in the device directory here. It also comes certified with Safety Integrity Levels (SIL) 2 and 3, and ratings of IP66, IP67, and type 4x.
Last but not least, it has active sensor technology! That means the EJA530E DPharp sensor sends data continually. If the signal disappears, then the device will send a search party. And a patented self-check system makes sure all the calculations work correctly. Nifty!
This Yokogawa pressure gauge is a flexible device with plenty of field protocols and sensors to fit various processes. But the complicated local setup becomes downright painful if you don’t have a handheld.
This video explains how the LPS works: