Alicat Scientific MCD Series bidirectional mass flow controllers

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Alicat Scientific introduces what it claims to be the first bidirectional flow controller. The MCD Series bidirectional mass flow controller control flows into the user’s process in one direction and then switches direction; or controls flow into a closed process and then vents the volume, with no need for additional bleed valves.

The product is able to: measure mass flow and volumetric flow in both directions plus absolute pressure and temperature; control mass or volumetric flow from a pressurised source or from vacuum; control absolute pressure or backpressure in a flowing process; control absolute pressure in a closed volume with automatic venting.

The flow controller is easy to use. With the local display, users can make changes to the configuration of the unit without the need for computers, complicated software or scripts.

The product is rated with accuracies of ± 0.8% of reading + 0.2% of full scale. It has very few moving parts and a repeatability of ± 0.2% of FS.

The device has a response time of less than 10 ms and a control time of 100 ms. It is available in any flow range, from 0.5 sccm through 3000 slpm, and is equipped with analog outputs and inputs. It requires little power to run, reducing operating costs, and has less pressure drop when compared to similar flow devices, meaning more process fluids go into the process and not into the measurement devices.

The product is used in processes like pharmaceutical and semiconductor manufacturing, fuel cell research, auto-paint application and emissions-compliance equipment.