The Fideris™ Liquid Delivery Modules are mass flow controller or pump based, rack-mount modules which provide for computer controlled delivery and blending of an unlimited number of liquids. Each rack mount module is available as standard delivery, extended range (dual MFC for high/low flow) or two liquid blending. The individual outputs may then be combined as desired to deliver liquid blends to the device under test, reaction chamber, or process. Modules include a bubble tight inlet valve, inlet pressure regulator, inlet pressure switch upstream of the mass flow controller, a reverse flow prevention check valve on the discharge, and are available in brass, 316 stainless, 316 VAR for UHP applications, and teflon. An ethernet interface is standard and provides 100% digital communication between the computer and the mass flow controller to eliminate all other calibration and electronic noise issues, thereby providing the full accuracy of the mass flow controller. The front panel shows the setpoint and actual flow, inlet liquid pressure status, and communication status for complete operational status at a glance and making diagnostics a snap. Choose from several brands of mass flow controllers (thermal, ΔP, or Coriolis) or pumps (gear, positive displacement, syringe), specify full scale flow, specify desired inlet and outlet pressures, and request high accuracy MFC calibration. Also available as MFC based gas delivery modules for the addition of nearly any gas!