NORTH BILLERICA, MA -- BTU International today raised revenue guidance for its second quarter ending June 30 on the strength of higher than expected sales of reflow soldering equipment. 

BTU upped its second quarter revenue forecast to $16 million to $17 million, versus the April 29 company estimate of $14 million to $15 million.

"Bookings during the quarter, primarily in the electronics assembly business, have been stronger and related revenue is expected to be higher than originally forecast," the company said.

 The company is scheduled to report its second quarter financial results on July 29.