A thermometer is a device that measures temperature or a temperature gradient using a variety of different principles. A thermometer has two important elements: the temperature sensor (e.g. the bulb on a mercury-in-glass thermometer) in which some physical change occurs with temperature, plus some means of converting this physical change into a numerical value (e.g. the visible scale that is marked on a mercury-in-glass thermometer). Operating principles of thermometers include the thermal expansion of solids or liquids with temperature, or the change in pressure of a gas on heating or cooling. Radiation-type thermometers measure the infrared energy emitted by an object, allowing measurement of temperature without contact. Thermometers are widely used in industry to control and regulate processes, in the study of weather, in medicine, and scientific research.
圖片編號:
48709393
拍攝者:
Tuayai
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 318 x 480 | JPG | 13 | |
標準授權 | S | 530 x 800 | JPG | 15 | |
標準授權 | M | 1409 x 2128 | JPG | 18 | |
標準授權 | L | 1819 x 2747 | JPG | 20 | |
標準授權 | XL | 2301 x 3475 | JPG | 22 | |
標準授權 | MAX | 3264 x 4928 | JPG | 23 | |
標準授權 | TIFF | 4616 x 6969 | TIF | 39 | |
進階授權 | WEL | 3264 x 4928 | JPG | 88 | |
進階授權 | PEL | 3264 x 4928 | JPG | 88 | |
進階授權 | UEL | 3264 x 4928 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 318 x 480 px | JPG | 13 點 |
標準授權 | 530 x 800 px | JPG | 15 點 |
標準授權 | 1409 x 2128 px | JPG | 18 點 |
標準授權 | 1819 x 2747 px | JPG | 20 點 |
標準授權 | 2301 x 3475 px | JPG | 22 點 |
標準授權 | 3264 x 4928 px | JPG | 23 點 |
標準授權 | 4616 x 6969 px | TIF | 39 點 |
進階授權 | 3264 x 4928 px | JPG | 88 點 |
進階授權 | 3264 x 4928 px | JPG | 88 點 |
進階授權 | 3264 x 4928 px | JPG | 88 點 |