MKS Instruments (NASDAQ:MKSI) reported quarterly earnings of $2.30 per share which beat the analyst consensus estimate of $2.04 by 12.75 percent. This is a 34.5 percent increase over earnings of $1.71 per share from the same period last year. The company reported quarterly sales of $1.078 billion which beat the analyst consensus estimate of $1.046 billion by 3.09 percent. This is a 15.17 percent increase over sales of $936.000 million the same period last year.