Why is the mini CORI-FLOW called mini?

July 25, 2017 Chris King
mini CORI-FLOW in action

When Bronkhorst® developed the mini CORI-FLOW mass flow meter it was named so for two reasons: it was small and it measured and controlled low flows, using the Coriolis principle. Saying something is ‘’small” or handles “low flow” is about as subjective as the answer to “How long is a piece of string?”.
So let’s take a more objective look at why the mini CORI-FLOW is truly mini.

The world’s smallest Coriolis meter and controller

The mini CORI-FLOW flow meter models M12, M13, and M14 are only 144 mm (5.67 in) tall, 32mm (1.26 in) deep, and (for a controller with integral valve included) only 146mm (5.75 in) end to end. To put that in better perspective, the Samsung Galaxy S8 smartphone is 148.9mm (5.86 in) tall. A fully functioning Coriolis controller, a complete control loop consisting of measuring sensor, PID control, and control valve will all fit in your hand about as well as the latest smartphone!

There is not another Coriolis based complete control loop in the world that is as compact as the mini CORI-FLOW mass flow meter. Granted you will likely not be holding it in your hand, so why does that matter?
Because real estate in a system creates cost; the less space needed, the lower the cost. Because it may be critical to have the final control element (valve) as close to the point of measurement as possible; if you can’t fit a sensor, transmitter, and control valve into a small space near the point of injection into a reaction your system may not be able to perform as required.

The world’s lowest flow Coriolis meter and controller

There are some heavy hitters in the Coriolis world, and you may have your favorite that you use as standard, but if you want the accuracy, speed, and stability of Coriolis measurement and control at low flows then Bronkhorst should be on your list for consideration. You may find that, depending on your flow requirement, Bronkhorst may be the only name you can put on your list.

“Low flow”, what is low?

Back to our objective view; the mini CORI-FLOW mass flow meter (model ML120) has a minimum full scale range of 0.05 – 50 g/h (grams per hour). To give you a better feel for just how low a flow this is, consider that if your favorite coffee house were to flow coffee at 50 g/h (which is 1.76 ounces per hour) it would take 6.82 hours to fill your small (12 oz./350ml) coffee.

Those of you who require a harder push in the morning should place your order the night before as the big one (20 oz./590ml.) would take 11.4 hours to fill! Better hope they don’t use the lowest flow of 50 mg/h (milligrams per hour) or that small coffee would take 6,818 hours (284 days) to fill.
We have yet to provide a mini CORI-FLOW mass flow meter specifically for filling a morning cup of coffee but there are mini CORI-FLOW instruments measuring and controlling various fluids in applications where it had initially been thought that Coriolis technology could never be applied because the required flow was too low for the technology.

Comparison between Samsung phone and mini CORI-FLOW M12
Comparison between Samsung phone and mini CORI-FLOW M12

Truly mini

A complete Coriolis control loop that you can hold in your hand, and that will measure and control flow so low and stable that you can watch the drips form, is the reason Bronkhorst named this giant of an instrument the mini CORI-FLOW. Stay tuned for more; as a leader in low flow fluidics handling technology Bronkhorst continues to develop instruments that will measure and control lower and lower flows.


  • Watch our video to find out the working principle of the Coriolis mass flow meter.
  • Check out our success story using Coriolis mass flow meters for flow measurement in microfluidics.

Bronkhorst USA LLC

57 South Commerce Way
Suite 120
USA - Bethlehem, PA 18017 
Tel.  +1-610-866-6750

Copyright © 2021 Bronkhorst. All rights reserved.     Sitemap     Disclaimer     Privacy note