http://www.rentokil.co.uk/files/file_301261.pdfhttp://www.youtube.com/watch?feature=player_embedded&v=DsvwgWkIPjIRADAR has two entrances, one at each end
of the unit, allowing mice to run through
its passageway. When the mouse breaks
two consecutive infrared beams, it trips
a circuit that immediately closes both
entrances. Once the mouse is trapped
inside the tightly sealed chamber, the
carbon dioxide gas is released. The gas acts
extremely rapidly and is widely recognised
as a humane method of control.
How much do those darn thingies cost anyways. A CO2 canister & IR diodes & sensors, a solenoid to drop two trapdoors, a gastight enclosure, a battery, a blinking LED & a chip to trigger it all. Wow. Has to be $50 at least eh?