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Otherwise known as a Maximum - Minimum thermometer.
Records the max and min temperature, at the position of a couple of small metal riders.
A u-tube, each arm a few inches long. The lower part of the U contains Mercury, and there will be a small metal bit (a rider) above the mercury in each arm. One of the arms is otherwise filled with alcohol, and the other arm will have a vacuum or alcohol under low pressure.
As the alcohol arm expands, it will depress the mercury column in that arm, and thus elevate the mercury column in the other. The riders are pushed up their respective tubes by the mercury as appropriate. When the temperature changes and the mercury withdraws, the metal bits will remain in position, (by a weak magnet) thus recording the max (or min) temperature in that column.
There is usually a small push button, which moves the weak magnet away from the columns, thus allowing the metal riders to fall to the top of the mercury columns.
The temperature read at both ends of the mercury column (bottom of the riders) should be the same.
A U-shaped thermometer works on the principle of thermal expansion of a liquid. The liquid in the U-shaped tube expands or contracts when the temperature changes, causing its level to rise or fall in one arm relative to the other. This change in level indicates the temperature measurement.
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Why would a mercury thermometer not work below -39 degrees Celsius?
Mercury freezes at around -39 degrees Celsius, so below this temperature, the mercury in the thermometer would solidify and no longer be able to expand and contract with changes in temperature, rendering the thermometer unusable.
What instrument measures hot or cold air?
A thermometer is used to measure the temperature of air, indicating whether it is hot or cold. Temperature readings are typically displayed in degrees Celsius or Fahrenheit.
What instrument is used to measure thermometer?
A thermometer is typically used to measure temperature.
How do you measure room temperature using thermometer?
To measure room temperature using a thermometer, simply place the thermometer in the room for a few minutes to allow the temperature to stabilize. Then, read the temperature indicated on the thermometer display. Make sure the thermometer is calibrated and accurate for the most precise measurement.
What instrument is used to measure temperature of cup of tea?
A thermometer is typically used to measure the temperature of a cup of tea. These thermometers can be digital or analog, and they provide an accurate reading of the tea's temperature.
What is a dual probe thermometer?
this is a thermometer that can work twice as much as a normal thermometer or a thermometer that can check the temperature of two things at the same time
How does love thermometer work?
by heat
Will a thermometer work in the horziontal position?
Yes, it will.
How a laboratory thermometer work?
It works when the thermometer gains heat from the surroundings. When the thermometer gains heat from the surroundings, gradually Mercury expands and it points the accurate measurement of temperature.
How does a thermometor work?
i don't know how a thermometer works
How do you tell how hot or cold something is?
use a thermometer.We can feel how hot or cold something is. However, sometimes things are just too hot or cold for us to feel safely. At other times we need to know exactly how hot or cold something is. When we need to measure temperature correctly we need to use an instrument called a thermometer. This measures temperature in degrees Celsius [sometimes called centigrade] or degrees Fahrenheit. There are different types of thermometers for different situations. A medical thermometer, for example, needs to be very accurate. It measures in fractions of degrees. When we are ill, even tiny changes in temperature are important. Some thermometers use a liquid that moves up a very fine glass tube. Most room thermometers, and outdoor thermometers are like this. The liquid is either mercury [ which is poisonous] or coloured alcohol. As liquids get warmer they expand [get bigger], and move up the tube. Water expands too, but not as much as alcohol and mercury. Thermometers that might be used by small children are not made of glass. They use a digital display which lights up the temperature. Inside the displays are chemicals that change colour according to the temperature.
What thermometer would be used to collect data over a twenty four hour period of time?
You can use the recording thermometer or the mercury thermometer, either one of those will work.
What instrument measures Antarctica's temperature?
This work is commonly accomplished by a thermometer.
How does a liquid in glass thermometer work?
the heat makes it expand you see
What are 10 tools the scientist use in their work?
Barometers, Anemometer, Thermometer
How does a USB thermometer work?
A USB thermometer works in much the same way any digital thermometer works by measuring the temperature of the individual via contact with their skin or mouth. The USB thermometer is then able to be plugged into a computer via the USB to record and chart the findings.
How does alcohol in a thermometer work?
Alcohol in a thermometer expands when heated and contracts when cooled. This change in volume causes the level of alcohol in the thermometer to rise or fall. By measuring the level of the alcohol, the temperature of the substance being measured can be determined.
