Well, certainly I can speak somewhat to the temperature issue. That paper is American, so I think they said it was 48 degrees, which we all know to be Fahrenheit.
These devices—at least the ones I'm familiar with, and the ones I would recommend—utilize fuel cell technology as their mechanism for detecting alcohol, and fuel cells can be affected by cold weather. What will happen if they're cold is that you will get an underestimation of the actual result. That means that it will have a false negative, potentially. That's true of the approved screening devices as well, which is why we instruct our officers when they're doing snowmobile patrol, for example, to keep it inside their parka.
I don't know the specifics about some of the devices that are out there, or how they're protected against the cold, but it could cause a false negative. The alcohol sensor, as a fuel cell, will not cause a false positive, which is something that is very encouraging—to a forensic scientist, anyway—by having it cold, nor will heat cause false positives.
With regard to damp conditions, once again I think this comes back to my earlier testimony that the environmental conditions are far more important with these devices than they are with anything we've ever tested before. We'd have to turn our minds to that very, very carefully. The study you've alluded to with the windy conditions was done by NHTSA in the United States. They produced a breeze in the lab that I think was characterized at 0.5 miles per hour. We're Canadians. That's nothing up here.