The XLi 800 alloy analyzer weighs 1.7 lb (0.8 kg) and performs typical alloy identification in less than three seconds. Infiniton(tm) isotope source configuration provides a fast analysis that never slows down, never requires replacement and eliminates the need to measure with multiple sources. The XLt 800 alloy analyzer uses an x-ray tube excitation source, providing enhanced element excitation without the use of radioisotopes. The unit weighs 3 lb (1.4 kg) and reduces the regulatory requirements involved in shipping and transport of the instrument that typically are experienced with radioisotope-based systems.