Thermo Fisher Scientific Inc. Offers Cross Belt Online Elemental Analyzer. Thermo Fisher Scientific Inc. Also manufactures various types of scientific instruments. The Cross Belt Online Elemental Analyzer, Model CB Omni, is a Prompt Gamma Neutron Activation Analysis [PGNAA] system designed to integrate into either a new or an existing conveyor belt line and analyze, in real time, the composition of raw materials being transported by conveyor belt. The Cross Belt Online Elemental Analyzer is not subject to errors and costs associated with material sampling.