Method and apparatus for determining the concentration of...

Details Method and apparatus for determining the concentration of... Method and apparatus for determining the concentration of...

G - Physics

01

N

G01N 33/98 (2006.01) G01N 25/22 (2006.01) G01N 33/497 (2006.01)

Patent

CA 2116689

Testing apparatus is provided in the form of a pen and has a body (11) and cap (12), The body (11) has an inlet (l3) at its tip which communicates with a fuel cell chamber (14), containing a fuel cell (15), and, via that chamber, with a passage (16) and a cylinder (17). A piston (18) is mounted in the cylinder (17) for operation by a button (19), a spring (21) and latch (22) such that it can Brave air through the inlet (13) to the fuel cell (15). If the inlet (13) is placed in a user's mouth the apparatus can provide an indication of his breath alcohol concentration, for example, on display (23).

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