Consumer or Patient usable blue tooth connected Spirometer with Smartphone APP : AirNext from Nuvair 199 Euros.
Metabolic Status Analyzers
Breath isoprene analyzer as a correlate for blood cholesterol levels
Nitrous oxide analyzer as a correlate for asthma and other inflammatory conditions.
Mercaptan/Methanthiol breath analyzers
Explosives sniff detector. from Vaporsense