Check the listing for details. UNIT UFC-1100A Mass Flow Controller for O2 Gas, 1 SLPM, Calibrated and Sealed.. Condition: Used, Made in United States. Listed at 500.00 USD. The UNIT UFC-1100A Mass Flow Controller for O2 Gas is a highly precise and reliable device designed for controlling the flow of oxygen gas. With a maximum flow rate of 1000 SCCM (1 SLM) and a port diameter of 1/4 inch, this controller is ideal for a variety of industrial applications that require accurate measurement and control of gas flow. The unit is calibrated and sealed by Laminar Technologies Inc. to ensure optimal performance and repeatability, making it a valuable tool for businesses in the fields of Semiconductor Industries. Made in the United States by the trusted brand UNIT, this mass flow controller is a top choice for those seeking quality and precision in their gas flow control systems.