“Scent is difficult to control,” the gallerist said. There’s fear of odors spreading and contaminating other works, which is fair—following an early show by artist Camilla Nicklaus-Maurer, Keller had trouble getting the smell of banana out of his own clothes. These days, however, he’s equipped with a pump that can turn over the air inside the gallery within an hour.

— Read more in Olfactory Art Dealer Andreas Keller Already Knows How to Sell to Clients Looking for Rare Perfumes. But Art Collectors? That’s New Territory at Artnet. Keller's gallery, Olfactory Art Keller, is in New York City's Chinatown.