* Says Q2 sales to be at lower end of $220-$240 mln outlook
* Says impacted by shifts in semiconductor customers order timings
* Shares down 5 pct (Follows alerts)
June 15 (Reuters) - Chip-gear maker MKS Instruments Inc said its second-quarter sales will be at the lower end of its prior outlook due to changes in timing of orders and shipments by its customers, sending its shares down five percent.
The company, which supplies gas measurement, control and analysis products to make chips, said it expects June quarter revenue to be around the lower end of our prior guidance of $220 to $240 million.
Analysts were expecting second-quarter sales of $229.3 million, according to Thomson Reuters I/B/E/S.
Shares of the Andover, Massachusetts-based company were down 5 percent at $23.67 on Wednesday morning. They closed at $24.92 on Tuesday on Nasdaq. (Reporting by Soham Chatterjee in Bangalore; Editing by Prem Udayabhanu)