Breath alcohol testing device

DETAILED DESCRIPTION In accordance with this invention, generally, stated, in a breath alcohol testing device designed to determine blood alcohol concentrations, the device including a breath-receiving tube, a fuel cell chamber communicating with the tube, a fuel cell within the chamber and a movable wall mounted adjacent the fuel cell to be moved reciprocably between a down position at which the wall is relatively close to the fuel cell and an up position at which the wall is relatively far from the fuel cell, the movement of the wall acting to pump breath to and from the fuel cell, the movable wall, a diaphragm in the embodiment described, defines one wall of the fuel cell chamber, and breath in the space between the diaphragm and the fuel cell is in substantially unrestricted communication with the fuel cell.