AMETEK Inc. is set to acquire Gatan, a manufacturer of instrumentation and software used to enhance and extend the operation and performance of electron microscopes, from Roper Technologies Inc. in an all-cash transaction valued at $925 million. 

Upon closing, Gatan will join AMETEK as part of its Electronic Instruments Group, which specializes in advanced analytical, monitoring, testing, calibrating and display instrumentation.

Gatan has annual sales of approximately $180 million and is headquartered in Pleasanton, California. The transaction is expected to close in the fourth quarter of 2019 and is subject to customary closing conditions, including applicable regulatory approvals.