Check the listing for details. Brooks Mass Flow Controller 5850S/BC1BA1AA0AA1A1 , Gas O2, Rate 10500 SCCM. Condition: Used. Listed at 350.00 USD. This Brooks Mass Flow Controller 5850S/BC1BA1AA0AA1A1 is a reliable and efficient choice for controlling the flow of gas or liquid in various industrial applications. With a maximum flow rate of 2 SCCM, it is suitable for a wide range of pumps and plumbing systems. The brand name Brooks is synonymous with quality and durability in the industry. This flow controller is designed to provide accurate and consistent performance, making it an ideal choice for use in business and industrial settings. It is easy to install and operate, and its compact design makes it suitable for use in a variety of spaces. Whether you're looking to control the flow of gas or liquid in your pump system, this Brooks Mass Flow Controller is an excellent choice.