MKS Pressure Controller Model 640A-21646

MKS Pressure Controller Model 640A. Range is 50 psi. The MKS Instruments 640 Absolute Pressure Controller is a self-contained compact, closed-loop electronic control system used for upstream or downstream pressure control. It contains a Baratron Capacitance Manometer, normally-closed proportioning control valve, and closed-loop control electronics. Electrically similar to a standard MFC, the 640 is powered by ±15 VDC at only 200 mA, permitting use with standard power supply/display electronics. The pressure output and input control signals are linear 0-5 or 0-10 VDC, user-selectable. Two trip points are included in the 640, with LED status indicators, for use as simple on/off process limits. Brand new in sealed bag. Part # 640A-21646