Gentec-EO is a highly accurate calorimeter for huge, high energy laser beams. Teaming with many advanced research centers, Genter-EO has become a global leader in the manufacturing, servicing, and calibrating of calorimeters and are used in energy inertial confinement fusion calorimetric measurements. The device is highly advanced and work on materials ranging from surface coating to robust volume absorbers. It has excellent signal to noise ratios, is highly sensitive with vacuum compatibility, and it is intricately designed with expert workmanship. Gentec-EO, with over 40 years of expertise is an apt choice for any energy measurements.