Xconomy -- Thermo Fisher Scientific (NYSE:TMO), the Waltham, MA-based global provider of products and services for labs and other customers, has agreed to buy Lomb Scientific for an undisclosed sum, according to a press release. Lomb is a provider of lab chemicals, consumables, and instruments in Australia, New Zealand, and parts of Asia and the Middle East, according to Thermo Fisher. With about 100 employees, Lomb had 2009 revenue of $32.5 million based on the current exchange rate between the Australian and U.S. dollars.