Shopping for industrial pumps flow control can quickly turn into a hunt for compatible parts, especially when your process needs air or CO2 flow modulation. A single integrated unit is nice, but sometimes the practical move is a bundle of components that you wire, mount, and tune yourself. That is exactly the territory this used CKD/Yokogawa kit occupies.
Quick verdict
The Air + CO2 Industrial Flow Modulator CKD Flow Controller FCM, RB500 x2 Yokogawa is a used lab pull priced at USD 899.99. It combines a CKD FCM flow controller, two CKD RB500 compact pressure regulators, and a Yokogawa control board model M3839NE, all made in Japan. If you are comfortable building and debugging your own flow control loop, it gives you a strong set of building blocks. If you expect a drop-in, documented device, it will probably disappoint.
Who it suits
This bundle suits engineers, technicians, and makers who have an existing flow control project or a bench setup in mind. It fits someone who can identify port sizes, confirm signal compatibility, and mount the components properly. It is less suited to a shopper who wants a sealed, preconfigured modulator that arrives ready to install.
What stands out from the listed details
The most useful part is what is included: the CKD FCM series flow controller for modulation, the pair of RB500 series compact pressure regulators to handle supply pressure, and the Yokogawa control board to tie the control signals together. Having two regulators means you can manage two separate supply lines, which is handy for air and CO2 mixing. All components are listed as made in Japan, and the item came out of a lab in good working shape.
Meaningful trade-offs
The big trade-off is uncertainty. The listing itself says the seller is not sure exactly what the unit is and could not find a comparable one. That means you are buying components rather than a documented solution. Expect to identify the correct gas flow ratings, pressure ranges, and electrical connections yourself before you put the bundle into service. Returns are accepted if the item is not as described, but beyond that, compatibility is your responsibility.
Air + CO2 Industrial Flow Modulator CKD Flow Controller FCM, RB500 x2 Yokogawa
This is the complete bundle at USD 899.99. The centerpiece is the CKD FCM flow controller; around it sit two CKD RB500 compact pressure regulators and a Yokogawa M3839NE control board. The multiple regulators make it easier to set up separate air and CO2 paths, while the Yokogawa board gives you a place to connect the control side. Choose it if you need those exact building blocks for an industrial flow control setup. The same thing that makes it flexible-a mixed-component lab pull-also means you are responsible for proving compatibility before relying on it.
Bottom line
If your industrial pumps flow control setup is still on the drawing board and you have the skills to integrate components, this CKD and Yokogawa bundle is a practical way to get started. You are paying for a combination that would be tedious to source individually. Just go in knowing it is a project, not a packaged product.
