An air-conditioning system of a vehicle for air-conditioning a vehicle interior compartment may include a channel system which is flowed through by air and a sensor device for detecting at least one property of air. The sensor device may include at least one analysis channel through which air is flowable during operation, and a generating device configured to generate and emit electromagnetic waves. The sensor device may also include a diverting device configured to divert the electromagnetic waves emitted by the generating device at least partially into an interaction section of the at least one analysis channel, through which interaction section the diverted electromagnetic waves may pass and interact with air flowing through the at least one analysis channel. The sensor device may also include a detector which detects the diverted electromagnetic waves after the interaction with the air.