MKS Instruments 1559A-22518 Mass Flow Controller (without box) is a precision device that monitors and regulates the flow rate of gas within a process system. The model number 1559A-22518 identifies this specific unit, and the listing notes that it is sold without its original packaging. Designed to integrate into gas-delivery or vacuum setups, this mass flow controller provides automated gas flow control through its sensing and control circuitry, enabling reliable, repeatable flow in configured systems.
