| 摘要 |
<p>A thermometer, comprises a plurality of spaced-apart thermochromic Patches 361-36n, each of which comprising a liquid crystal that, within an operating temperature range of the thermometer, exhibits a single colour change at a respective threshold temperature within the operating range. Having exhibited that colour change, each liquid crystal is a distinct colour distinct from at least one other patch that has exhibited a colour change. Each patch may include indicia that become visible when the threshold temperature of the patch is exceeded. The indicia may be a numeric sequence and / or symbols, letters or shapes. The thermometer may be standalone, or it may include a base 10 that can be attached to a shelf 20 of a storage cupboard, a refrigerator or a freezer.</p> |
