Biosensor for measuring caused by smoldering fires, organic trace components

The invention pertains to a biosensor with a chemoreceptor for detecting one or more trace components produced by burning. The chemoreceptor is preferably connected to a semiconductor component via an electrolyte. The biosensor can be designed in such a way that only a small number of insect antenna segments, in particular a single such segment, is connected at one end of the chemoreceptor directly or via the electrolyte to the semiconductor component.