Заполните пропуск _______ sensors are used to detect liquid or powder levels or interfaces between ...: ответ на тест 804641 - Английский язык

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 _______ sensors are used to detect liquid or powder levels, or interfaces between liquids.

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Heat causes liquids to expand. This effect is used in the thermostat in Fig. 21.2. An increase in air temperature causes the liquid to expand in the heat sensor. This expansion causes the valve to close and consequently the flow of hot water is reduced.
After a time, the temperature will go down and consequently the liquid will cool and contract. The spring load will now be greater than the liquid pressure and consequently the valve will open. Once again, the hot water flow is increased.
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Heat causes liquids to …

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 _______ is the most commonly used semiconductor material today, along with gallium arsenide, germanium, and some other materials.

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The resistive temperature device can actually be regarded as a high precision wire wound _______.

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 _______ sensing devices are used to measure levels of solid, dry materials.

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 _____is a measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects.