Patent ID: 7465796

Claim:
A sensor control unit, comprising: a housing adapted for placement on skin and adapted to receive a portion of an electrochemical sensor extending out of the skin having a plurality of contacts; a plurality of conductive contacts disposed on the housing and configured for coupling to the plurality of contacts on the electrochemical sensor; and an rf transmitter disposed in the housing and coupled to the plurality of conductive contacts for transmitting data obtained using the electrochemical sensor, wherein the electrochemical sensor comprises: a working electrode; a counter electrode; an enzyme disposed proximate to the working electrode; and a complex disposed proximate to the working electrode, the complex having the formula: wherein c is a negative, neutral, or positive charge represented by −1 to −5, 0, or +1 to +5, inclusive, respectively; M is osmium; L 1 has the formula: wherein R 7 is a substituted or unsubstituted aryl or a substituted or unsubstituted C1-C12 alkyl; R 8 is —H or Cl alkyl; and a combination of R 9 and R 10 forms a fused, saturated or unsaturated, 5- or 6-membered ring; L 2 is a halide; and L and L′ are independently: wherein R′ 1 is a substituted or an unsubstituted C1-C6 alkyl; R′ 3 and R′ 4 are independently —H; and R a , R b , R c , and R d are independently —H or Cl alkyl; wherein said complex is coupled to a polymeric backbone through one or more of L, L′, L 1 and L 2 .