Minimum-maximum thermometer

Minimum-maximum thermometer

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Credit: PAUL RAPSON/SCIENCE PHOTO LIBRARY

Caption: Minimum-maximum thermometer designed to float for use in water evaporation measurements. It is used together with a device to measure the level of the water (not seen). The thermometer tracks changes in water temperature that change air pressure in a bulb reservoir and moves a column of liquid. The tube is U-shaped, allowing a scale to be added to both sides and the two levels of the liquid used to track minimum and maximum temperature levels. The U-shaped tube is at centre and the bulbs are under a sunlight shield at upper centre. Markers inside the U-tube, moved in only one direction by the column of liquid, mark the minimum and maximum water temperatures.

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Keywords: environment, environmental, equipment, evaporation, floating, floating thermometer, maximum, maximum-minimum thermometer, measurement, measuring, meteorological, meteorology, minimum, one, single, technological, technology, temperature, thermometer, u-shaped tube, u-tube, water, water temperature, weather

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