Extorr, Inc. manufactures electronic instruments based on quadrupole mass spectrometer technology, with a focus on vacuum measurement products. Their flagship product, the XT residual gas analyzer product line, uniquely measures both total pressure and partial pressures of gases in vacuum systems. Extorr offers advanced technology for vacuum measurements at significantly higher operating ranges than traditional RGAs, providing value to customers worldwide. The company's expertise lies in developing instruments for precise vacuum measurements and residual gas analysis.