9 scientific, optical, analytical, measuring, dosing and controlling apparatus and instruments, particularly for laboratory analysis and for process control; namely, photometric analyzers, chemiluminescence-analyzers, luminescence-analyzers, fluorescence-analyzers, diluting apparatus for gases and liquids, distributing apparatus for liquids, spectroscopes, samplers for taking liquid samples of substances to be analyzed, in the form of syringe like devices and measuring spoons, automatic pipetting apparatus for the chemical analysis, extractors, tube racks, analyzers for microplates, automatic analyzers