The present invention relates to new hetaryl-substituted homotetramic and homotetronic acids of the formula in whichA, B, Q1, Q2, W, G and Het have the meanings stated in the disclosure,to a plurality of processes for their preparation, and to their use as pesticides, microbicides, and herbicides. A sustained transient that is tracked as a system parameter is substantially varied thereby allowing sustained chaotic transients to exist far away from the crisis parameter values. Data is acquired at two different states of the gas, which eliminates the need to determine the concentration of nitrogen in the gas. In order to be able to take the actual thermal conditions on the test substrate and in particular also on known and unknown calibration standards and thus the thermal influence on the electrical behavior of the calibration standard used into consideration, the second support surface is equipped for temperature control of the calibration substrate.