Buyer guide: OPTIMASS 6400 and TCE 8000

Hey all! If you need to shop for a Coriolis meter, have we got a deal for you! Today in our buyer guide, we’ll check out the OPTIMASS 6400 from KROHNE and the TCE 8000 from TRICOR. So what are you waiting for? Get in there!

Oh wait, before that – these product reviews and comparisons examine only the features of each product, not their performance. You’ll have to discuss the devices in the comments with people who’ve used them to find out how they do on site.



So, what do we have here? KROHNE has a prominent place in the market as a conventional vendor, offering high-performance flow meters for liquid and gas applications.

image of OPTIMASS 6400
Courtesy of Krohne

Let’s start with the design. In a nutshell, wow! The interface gives you a smooth and easy setup, with its pretty display and clear depictions of the process variables. It’s also one of the few flow meters that offer measurement up to 1500 tons per hour. And the compact design, smaller than some competitors, saves space in the installation.

In protocols, it supports HART, FOUNDATION Fieldbus (FF), PROFIBUS DP/PA, Modbus, analog, and binary output – a limited list but sufficient for most needs. If you want EtherNet-IP, then the 6400 has a bit of a downside there. As for PROFINET, you can either wait or buy a converter.

However, the 6400 comes in stainless steel, Hastelloy, and duplex to provide corrosion resistance to chemicals, which does put a smile on my face.


The 6400 offers a wide range of parameters – density, temperature, concentration and more. And KROHNE says it can produce 0.10 percent in liquids (or 0.05 percent if you get the advanced version). It also reaches 0.35 percent for gas and  one kilogram per cubic meter for density. Plus, if you go with the on-site calibration, then the accuracy jumps to  0.2.


The 6400 brings good features, such as the automatic test run. As soon as you install it, it calibrates 90 percent of its parameters. This gets you off to a great start, because the device will have status messages, diagnostics, and input/output data to alert you to problems before you begin.

image of OPTIMASS 6400
Courtesy of Krohne

It also has redundant data storage. So if you have to swap out the electronic for a new one, then you can transfer the old one’s configuration to the new. We like this time-saving feature!

If you have entrained gas, then the 6400 ensures continuous measurement, one of the highlights of this device. You also have a good list of approvals, including custody transfer and safety.

TCE 8000


This device might not ring a bell, because it and its company are new to this field. TRICOR does come with a lot of experience, nearly 30 years in the automation sector.

With the TCE 8000, TRICOR offers a robust, accurate, and flexible flow meter. You can use it in a lot of different processes and segments. The add-on list may have a bit or bob to catch your eye too, so make sure you check that out.

image of TCE 8000
Courtesy of tricorflow


The TCE 8000 family can read data from all kinds of TRICOR sensors. Unfortunately, the technical files don’t make clear the difference between the 8000 and 8100. And that brings up another point – TRICOR needs to improve its documentation, because the files are hard to find and read.


The 8000 transmits flow rate, total flow, density, and much more. Although it doesn’t offer much innovation, it does provide the basics for a wide variety of processes.

However, it could use a better field setup, because the manuals and support catalogs don’t offer much help. You’ll find yourself downloading YouTube tutorials to get through it. The display doesn’t have a touchscreen, but you can do the setup there.

image of TCM 8000
Courtesy of tricorflow

And now, the protocols – HART, FF, Modbus RTU, analog output, and digital inputs. Decent, but the website lacks downloadable files for HART and FF. On the other hand, the TRICOR documents say “other options on request.” So you may want to talk to a TRICOR rep. And if you want to configure the 8000 through the configurator program, then you’ll want the HART communicator.

Here, you get 0.1 percent accuracy in liquid and 0.5 percent in gas. It gives a density accuracy of 0.001 grams per cubic centimeter, and you can request a special calibration. The sensors mainly differ in range and a few other things.


The 8000 will simply provide you with what you need, as long as you don’t need fancy innovation or wide compatibility. Sadly, it lags in digitalization when compared to other Coriolis meters. 

On the upside, it has the Net Oil software. Heard of it? It can determine the ratio of oil to water in your fluid. You won’t find this feature in most of Coriolis meters, so that makes a nice plus.

TRICOR doesn’t have an online tool to scale out flow meters for your process, but you can find out more here: Tricor Coriolis Technology

Table of comparison





TCE 8000




standard design, comfortable configuration, good display

simple design, but buttons inside housing and no touchscreen





HART, FF, and Modbus RTU, plus others on request 




stainless steel, Hastelloy, or duplex stainless steel; process connections like DIN, ASME, and JIS

only stainless steel; process connections like ANSI, weld neck, and tri-clamp




0.1 percent in liquid, 0.35 percent in gas; special option gives 0.05 in liquid

0.1 percent in liquid, density one kilogram per cubic meter; in gas, 0.25 percent with a density of 2.0



General information and documentation

website barely responsive on mobile, and issues finding what you want; device microsite seems good, with tables and videos; for downloads, you have to go back to the clunky main site

simple, clean, and responsive website; information easy to find but hard to read; no basic downloads like DD files



Keep in mind that what works for your neighbor may not work as well for you. So you have to scale out your candidates using your own process data to decide what fits your needs.

And if you decide a fancy-ish meter suits you, then you might want to plop the OPTIMASS 6400 on your shortlist. If you want to keep it simple, then the TCE 8000 supports most requirements in a more economical way. So which sounds good to you?

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