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Sniffing Out Bedbugs

Two years ago, as more and more people began waking up with itchy, red welts on their body, Chris Goggin, an innovator with two dozen patents realized the world needed a cheap and effective way to detect bedbugs.

The notorious insects, which reemerged in the US about 10 years ago after a 50-year hiatus are extremely difficult to find. They can hide in the folds or cracks of nearly any object. Unlike cockroaches and mice, bedbugs don’t respond to poison-laced baits or bombs. Exterminators must deliver poisons more directly, so pinpointing the insects’ exact location is vital in stamping out an infestation. During a typical inspection, an exterminator may spend up to an hour per room seeking bedbugs out. Goggin’s Bed Bug Detective does the same job in 15 minutes.

The device replicates the way dogs pick up scents, enabling it to sniff out bedbug pheromones, chemicals that insects use to communicate with one another. Dogs’ olfactory system allows them to recognize even the faintest of scents. In recent years, well-trained bedbug-detecting pups have proven their ability to recognize bedbug pheromones with 98 percent accuracy in a controlled study. Goggin’s cocker spaniel, Nina, acted as a model by lending the device her unique “sniff cadence,” the rhythm dogs use to breathe in an odor. The snuffling pulls a scent into the smaller of a dog’s two olfactory chambers; over time, faint aromas build up in the chamber and become recognizable to the animal.

How it works

A fan sucks air in through seven small holes in the wand. The air comes into contact with three sensors capable of detecting a bed bug’s unique aromatic signature, a combination of pheromones, CO2 and methane. Software monitors and adjusts the system, and a colour display shows when the user is getting closer or farther from the source Blanddesigns.co.uk

Exterminators in the US currently employ around 200 dogs, a number that’s on the rise. But the training and care for a dog can run a pest-control company between $30,000 and $70,000, according to the National Pest Management Association, USA, a cost that’s generally passed on to the customer. Since training isn’t regulated, some dogs do not learn to find bedbugs adequately. Those that do can locate an infestation to only within a few feet, which still leaves a lot of space that must be searched by hand. Dogs also don’t distinguish between male and female pheromones (egg-laying females pose the highest infestation risk) or sense other signatures such as the insects’ odorless carbon dioxide and methane emissions.

Goggin’s electronic version uses CO2 and methane sensors, as well as a proprietary pheromone detector, to pinpoint bedbugs to within one square inch, from a distance three times as far away as a dog could. The device can also tell the bugs’ sex. The handheld unit will go on sale this year for $200. Goggin says a new model that works for a wider variety of pests, including cockroaches, ants and mice, is on the way.

http://www.popsci.com

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