'Mousetrap': Sydney trains sniff out graffiti vandals with new technology

By Jacob Saulwick
Updated May 12 2015 - 7:18pm, first published May 7 2015 - 3:00pm
Price tags: The state spent about $34 million last year removing graffiti.  Photo: Kate Geraghty
Price tags: The state spent about $34 million last year removing graffiti. Photo: Kate Geraghty
"Mousetrap" technology will raise the alarm when paint fumes are sensed.  Photo: Kate Geraghty
"Mousetrap" technology will raise the alarm when paint fumes are sensed. Photo: Kate Geraghty

Sydney's trains are being fitted with sniffing technology to catch graffiti vandals in the act.