Colored metalorganic fluids for electrowetting, electrofluidic, and electrophoretic devices are disclosed. The invention further provides for fluorescent oligonucleotide comprising one or more pteridine nucleotides. The system may determine the flame-sensing rod contamination, the stray capacitance of the flame sensing system, and compensate for stray capacitance in the flame sensing system. After selection of the required field device, at least one further supplementary search criterion relating to the selected field device is entered into a search field of the input mask in a refinement step, and the device data corresponding to the supplementary search criterion for the required field device is displayed after subsequent start of the search by the user.