|Successors||Thermo Fisher Scientific|
|Products||Analytical and scientific products and services|
Thermo Electron Corporation (NYSE: TMO) (incorporated 1956) was a major provider of analytical instruments and services for a variety of domains. It was built by George Hatsopoulos, John Hatsopoulos, and Arvin Smith. 
In 2011, Thermo Fisher Scientific, its successor, had revenues of over $11 billion, and employed 37,000 people.
On May 14, 2006, Thermo and Fisher Scientific announced that they would merge in a tax-free, stock-for-stock exchange. The merged company became Thermo Fisher Scientific. On November 9, 2006, the companies announced that the merger had been completed. However, the Federal Trade Commission ruled that this acquision was anticompetitive with regard to centrifugal evaporators, requiring Fisher to divest Genevac. In April 2007, Genevac was sold to Riverlake Partners LLC and the merger closed with FTC approval.
- Zetatron, a high-voltage vacuum tube device that generates a stream of neutrons
- "George and John Hatsopoulos, and Arvin Smith". Chemical Heritage Foundation. Retrieved 26 June 2013.
- Merger of Thermo Electron and Fisher Scientific Completed, Forming Thermo Fisher Scientific, press release, November 9, 2006
- Merger of Thermo and Fisher anticompetitive, FTC Ruling
- 3 April 2007. Riverlake Partners, LLC Acquires UK-based Genevac, Ltd. Press Release.
- FTC consent to Genevac divestiture, FTC news release