Abstract: A gas sensor includes know types of electrodes such has sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.

Abstract: A gas sensor includes know types of electrodes such has sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.

Abstract: A gas sensor includes known types of electrodes such as sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.

Abstract: An electrochemical gas sensor includes additional gas diffusion electrodes incorporated to carry out one or more diagnostic functions while the sensor is responding to a target gas. Members of a plurality of sensing and diagnostic electrodes can be switched by associated control circuits to intermittently sense a target gas while others intermittently sense a different gas. The diagnostic electrodes are in direct communication with the target gas that is entering the cell.

Abstract: At least one video camera mounted upon the tractor part of a truck. An anchor is affixed to the truck so as to prevent any relative motion of anchor and truck, and a rail is affixed to the anchor. A slider is moveably mounted upon the rail so that motion along the rail is allowed but the slider cannot depart from the rail. A camera rack is affixed to the slider but the camera rack and slider are angularly coupled to the trailer/semi-trailer of the truck, so that the rack and any cameras mounted thereon swivel with the trailer, not with the tractor. The angular coupling may be achieved with at least one roller affixed to the camera rack but urged against the trailer. There may be at least two cameras: one showing each side of the trailer.

Abstract: The present invention teaches at least one video camera mounted upon the tractor part of a truck. An anchor is affixed to the truck so as to prevent any relative motion of anchor and truck, and a rail is affixed to the anchor. A slider is moveably mounted upon the rail so that motion along the rail is allowed but the slider cannot depart from the rail. A camera rack is affixed to the slider but the camera rack and slider are angularly coupled to the trailer/semi-trailer of the truck, so that the rack and any cameras mounted thereon swivel with the trailer, not with the tractor. In the preferred embodiment, the angular coupling is achieved with at least one roller affixed to the camera rack but urged against the trailer. Also in the preferred embodiment, there are at least two cameras: one showing each side of the trailer.