Optofluidic diagnostics system

A multi-well test plate for an optofluidic diagnostic system, the multi-well plate configured to interact with at least one sensor unit, the at least one sensor unit configured to move sequentially into and out of registry with the multi-well test plate, said multi-well test plate comprising:

• at least a first, second and third well each having a well depth defined by an upper mouth and a lower base, the at least first, second and third well arranged in a sequence cluster wherein the first well comprises a sample reservoir for containing a liquid analyte reagent, the second well comprises a drainage chamber configured to drain liquid reagents from the at least one sensor unit, and the third well comprises a colorant reservoir for containing a liquid color development reagent;
• the at least one sensor unit comprising:
• a top end,
• a bottom end spaced vertically from said top end,
• a fluid duct extending continuously from said top end to said bottom end,
• a reactor section adjacent said bottom end, said fluid duct including an reactive coating agent immobilized over at least a portion of the fluid duct in said reactor section,
• the reactor section adapted to enter the at least first, second and third wells through the respective upper mouth thereof,
• the reactor section comprising a planar observation face wherein at least a portion of said planar observation face comprises an optically transmissive material,
• the at least one sensor unit further comprising a generally plano-concave lens disposed at a portion of said reactor section between said duct and said observation face.