A group of security dogs with supersensitive noses has arrived at Logan Airport as part of an initiative that the Transportation Security Administration says will make it easier for investigators to spot explosives.

The Labrador retrievers, which began working full time at Logan earlier this month, are the first of their kind in New England, officials said.

The dogs will be placed outside security checkpoints and will use their sense of smell to pick up on vapors, TSA Spokesman Michael McCarthy said.

“It’s like if someone with a lot of perfume walks through a room, you can still smell it even when they leave,” he said. “So with a K-9 nose. . . they’re going to pick up on even the smallest traces of what could be an explosive as passengers pass by.”