Patent ID: 8216524

Claim:
A testing device for testing or analysing fluids comprising: at least one sheet-or plate-like test member including analysis reagent and having opposite side surfaces surrounded by edge portions, and a separately produced holder having retaining means for receiving and retaining the test member in a predetermined relative position in the holder, said retaining means comprising an abutment surface engaging with one of said side surfaces of the test member and projections, which are positioned and shaped so as to allow insertion of the test member into the holder by moving the test member into engagement with said abutment surface while engaging with opposite edge portions of the test member, and said holder having upper and lower complementary surfaces so as to allow stacking of a plurality of testing devices on top of each other, which complementary surfaces are shaped so as to allow mutual displacement of stacked testing devices along one axis transversely to a longitudinal direction of the stack and prevent mutual displacement of stacked testing devices along other axes transversely to the longitudinal direction of the stack.