Gentec Electro-Optics (Gentec-EO) has a long history in the laser measurement field. With a 50-year track record of innovation and providing quality solutions for laser power and energy measurement applications from the factory to the hospital and laboratory As a former laser manufacturer, Gentec-EO knows the needs of its customers. In fact, its first laser energy measurement products were developed for internal use as the company put the first high repetition rate TEA CO2 lasers on the market in 1972. Gentec, Inc. introduced the first pyroelectric joulemeters shortly after that. Gentec, Inc. was also the first to manufacture both thermopile and pyroelectric laser power and energy detectors. In the mid-1990s, the company introduced the WB series (today known as the W5 and W9 series) with an average power density damage threshold of over 100 kW/cm2 that is still unrivalled today. In 2000, Gentec Electro-Optics, Inc. was formed from Gentec, Inc. so that it could focus entirely on thermal laser power and energy measurement. The acquisition, in 2010, of Spectrum Detector Inc. allowed to add measurement solutions for the new and rapidly expanding THz market, ultra-sensitive optical Joulemeters for applications down to femtojoules, instruments for pulse to pulse energy measurements up to 200 kHz and Optical TRAP detectors that act as primary calibration standards, to name a few.