Check the listing for details. Brooks Mass Flow Controller 5850S/BC1BB1AB2AA1A1 , Gas N2, Rate 30 SLPM. Condition: Used. Listed at 350.00 USD. This Brooks Mass Flow Controller is a reliable and efficient choice for controlling the flow of gas or liquid in your system. With a capacity of 30 SLPM, it is suitable for a variety of applications in the industrial and commercial setting. The controller is designed with high-quality materials and advanced technology to ensure optimal performance and durability. It is easy to install and operate, making it a great addition to your equipment. The Brooks brand is known for its exceptional quality and reliability, and this Mass Flow Controller is no exception. It is ideal for use in various industries, including manufacturing, construction, and engineering. Whether you need to control the flow of gas or liquid in your system, this controller is a great choice.