Danaher Corp., Washington, D.C., said its wholly owned subsidiary Fluke Electronics Corp. agreed to acquire Visual Networks Inc. for about $75 million in cash, including transaction costs and net of estimated cash to be acquired. With 2004 revenues of approximately $53 million, Visual Networks, headquartered in Rockville, Md., is a provider of network test and application performance management solutions and will become a part of Danaher's Fluke Networks business. The transaction was unanimously approved by the Visual Networks' directors and still must be approved by its shareholders as well as regulators.