MKS 649A 23962 Pressure Controller Valve Range 10 SCCM Gas N2 10 Torr

This listing is for a Wonderful Cosmetic & Operational Condition & Rare: MKS 649A 23962 Pressure Controller Valve Range 10 SCCM Gas N2 10 Torr as can be seen in the pictures.

Used MKS 649A 23962 Pressure Controller Valve Type 649 Range 10 SCCM, Gas N2 10 Torr. 

This controller valve has been fully tested and is in PERFECT working condition. 

Picture are actual of the controller valve.

Please feel free to read Manufacturer's Technical Data Sheet by Clicking: http://www.mksinst.com/docs/R/649A-MAN.pdf

THIS UNIT IS PRICED LOW SO AS TO SELL, WON'T LAST LONG, IF YOU NEED IT BUY IT!!! WON'T HAVE ANOTHER OPPORTUNITY, THESE ARE RARE!!!!

This unit was pulled out from a working environment due to new Grant Update (University Research). 

The MKS Type 649A Pressure Controller with an Integral Mass Flow Meter combines pressure control and flow metering capabilities into one compact unit. The 649 pressure controller includes a Baratron® capacitance manometer, proportioning control valve, closed-loop electronics, and patented thermal mass flow sensor. The closed-loop control circuitry enables the unit to function as a proportional-integral (PI) controller. The combination of a pressure controller and mass flow meter in one unit makes the 649 pressure controller the ideal solution for backside wafer cooling applications. In addition, the unit’s compact size and small footprint reduce space requirements compared to multi-component systems. The 649 pressure controller is available with full scale pressure ranges from 1333 Pa to 13.3 kPa and full scale flow rates from 10 to 5000 sccm (nitrogen equivalent). The 649 unit is metal sealed; the valve plug material can be metal, Viton®, Kel-F®, or Kalrez®. The unit can have either Cajon® 4-VCR® male (or equivalent) or 8-VCR male (or equivalent) male fittings. One Type “D” connector, located on the top of the unit, accepts the input power and has both the pressure (input and output) and flow (output) signals. You can connect the 649 controller to an MKS Type 247 or 246 Mass Flow Controller Power Supply/Readout or a Type 647 Mass Flow and Pressure Programmer/Display unit. The 649 pressure controller provides two user-settable alarm trip points. The pressure trip points can be set from 1 to 100% of full scale. Each trip point controls an open collector transistor. An LED light located on the top of the unit, indicates the trip point status. 

Everything is functional.