| 摘要 |
<p>A freezer failure indicator assembly is provided comprising an indicator unit in the form of a closed container party filled with an opaque liquid (1) and a support bracket (8) therefor. The container has an opaque zone (2) and a transparent zone (3) arranged to enable the liquid to be pre-frozen within the opaque zone followed by re-orientating the container relative to the bracket to render the transparent zone of the wall visible, devoid of any liquid and lower than the pre-frozen liquid. Thawing of the pre-frozen liquid causes it to move to become visible through the transparent zone. Colour imparting means (13) are carried by the bracket so as to be visible through the said transparent zone in the operative position thereof to thereby impart a first colour to the transparent zone in the absence of any liquid being ,present in it. The opaque liquid serves to obscure such first colour when the liquid is present in the transparent zone. The liquid has a second colour chosen to provide a colour indication distinctly different from said first colour when the liquid is present in the transparent zone.</p> |
