An air flow measuring device includes a passage forming housing, a sensor housing, and a sensor part. The engaging latch is inserted to connect the central hole, and has near the upper end thereof a control hole to select a state between offsetting from and communicating with the main body; a transverse window is provided beneath the control hole. The conductive pattern has contact areas corresponding to the inputoutput pads of the electronic device. Such common features are specified only in high-level patterns and temporal properties to be verified. The magnetic shielding may be a magnetic shield layer, patterned magnetic shield materials, andor magnetic particles embedded in the insulator. Based on the simulations, the system then implements one or more selected solutions.