Patent ID: 8236246

Claim:
A gas-sensitive apparatus comprising (a) first, second, third and fourth groups of sensor elements wherein no member of one group of sensor elements is a member of any other group of sensor elements; (b) a first electrode that contacts each member of the first group of sensor elements; (c) a second electrode that contacts one member of each of the four groups of sensor elements; (d) a third electrode that contacts each member of the second group of sensor elements; (e) a fourth electrode that contacts a member of the second group of sensor elements that is different from the member contacted by the second electrode, and a member of the third group of sensor elements that is different from the member contacted by the second electrode; (f) a fifth electrode that contacts each member of the third group of sensor elements; (g) a sixth electrode that contacts each member of the fourth group of sensor elements; (h) a seventh electrode that contacts a member of the first group of sensor elements that is different from the member contacted by the second electrode; (i) an eighth electrode that contacts a member of the second group of sensor elements that is different from the member contacted by the second electrode; (j) a ninth electrode that contacts a member of the third group of sensor elements that is different from the member contacted by the second electrode; and (k) a tenth electrode that contacts a member of the fourth group of sensor elements that is different from the member contacted by the second electrode.