Device for determining gas source direction that uses peltier elements to collect gas samples

A new device for determining the direction of a gas source is proposed. Peltier elements are used to transfer heat from the center of the device to its left and right sides. Ascending air currents generated from the warmed sides of the device bring a gaseous chemical substance trailing along the floor toward the right and left gas sensors. A descending air current is also generated from the colder central part of the device. This air current works as an air curtain and expands the sensor response difference. Experimental results are presented to show the soundness of the device design.