Product review: Honeywell SLG 700 SmartLine

Yes, here we are again to review another product! For those of you just tuning in, join us on our journey through level measurement paradise, where every week we bring new level information for you. This week we have guided wave radars for our product reviews. We have an article explaining the concept of its technology if you want to learn more.

I’ve encountered many guided wave radars in my professional career. I’m not a big fan in general, but in Brazil, most of the wireless applications I came across used radar transmitters. In fact, they performed quite well for me most of the time. Anyway, let’s dig into the features of our featured product.

With no more ado, let’s welcome the SLG700 Smartline from Honeywell! Honeywell has been around the block a time or two, but today we have a new model in the game. Let’s find out if the device can work for you!

Grab a milkshake, take a seat, have a read, and draw your conclusions!

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 SLG 700 Smartline makes a decent first impression, a compact device with multiple possibilities. Local configuration comes in a three-button option, but if you don’t need it, then you can go with the default. The SLG 700 also has a local display – with different languages, nice touch – that shows the process information, bar graphs, trend graphs, and signal quality.

SLG 700
Courtesy of Honeywell

You can use the SLG 700 in different liquids and solids up to 50 meters. The  technical manual gives it a reference accuracy of +-3 millimeters, not bad at all! The device also supports a temperature range from -60 to 450 degrees Celsius and a pressure range from -1 to 400 bar.

What can it do?

The SLG 700 can provide you with level, volume or interface measurements. I missed the option to set up the temperature as an output in the HART manual,  but maybe you won’t need it.

Guided wave radars use various probes to improve performance in different processes. Usually, you can find a table to tell you which will work best for yours. The SLG 700 has three probes – single wire, single rod, and coaxial. When you scale out the sensor, check which will suit you better.

SLG 700
Courtesy of Honeywell

By the way, you can scale out the SLG 700 with the Smartline level application and validation tool on your phone or laptop. I liked it, and you can quickly scale out the transmitter with it.

Why should I care?

Because the SLG 700 seems like a decent option. Now, let’s talk integration. The SLG 700 is a loop-powered device with analog, HART, Foundation Fieldbus (FF), and that’s all. If you need a different protocol or output, then keep looking.

The sales reps from Honeywell really like to pimp the modular design, but do you know what that even means? It means you can switch the old one for a new one easily, so you spend less time doing this sort of maintenance.

SLG 700
Courtesy of Honeywell

It also sports advanced diagnostics through the digital protocol or even on the display. You can check what’s going on inside the tank with the echo curve, which can help you to solve issues in your application.  You can see this data on the display but can you analyze it there? I couldn’t tell. You may want to use a handheld or specialized software for that.

The SLG 700 is a flexible device with good features, and you have a bunch of possibilities to implement this Honeywell transmitter in your application. So good luck with your scale out, and let us know if you find anything interesting!

This video on the SLG 700 Smartline is the funniest instrumentation video ever:

And these vendors have similar solutions, if you want to compare other devices:

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