What is the use of maximum and minimum thermometer?
What is the use of maximum and minimum thermometer?
Maximum/minimum thermometers are often used to measure a maximum/minimum air temperature for example in a greenhouse. Thus, the transfer liquid should preferably remain substantially liquid up to and above the highest expected temperature.
What is a maximum thermometer used for?
Maximum thermometers are commonly used to measure a person’s body temperature. Liquid thermometers can be limited by the type of liquid used. Mercury, for instance, becomes a solid at -38.83 degrees Celsius (-37.89 degrees Fahrenheit). Mercury thermometers cannot measure temperatures below this point.
What are the uses of minimum thermometer?
minimum thermometer A thermometer that records the lowest temperature to which it has been exposed (e.g. by allowing a fall of mercury past a restriction in the tube, but preventing the mercury’s return on expansion). It is most commonly used to record minimum daily temperatures.
What is the use of maximum and minimum thermometer Class 7?
Laboratory thermometer is used to measure the temperature of things other than human body. The daily maximum and minimum temperatures reported in weather reports, are all measured by a thermometer known as the Maximum minimum thermometer.
What is maximum and minimum thermometer Class 10?
A maximum and minimum thermometer is a device that records the highest and lowest temperatures reached over a certain time period or in a day at a certain place.
What is maximum and minimum thermometer Class 11?
Six’s thermometer is a thermometer used to record the maximum-minimum temperatures of a given location within a given time period, for instance, 24 hours. It is used to measure the extremes of the temperature. It is also called a maximum-minimum thermometer. It was invented by British scientist James Six.
What is maximum thermometer Class 8?
This is used to measure the maximum and minimum temperature. Role of index in minimum and maximum thermometer: The role of index in minimum and maximum thermometer is to enable to record the maximum day temperature to be read on the scale when the temperature rises during day time.
When was six maximum and minimum thermometer was discovered?
1780
It was invented by the British scientist James Six, in 1780; the same basic design remains in use. It is also commonly known as a maximum–minimum, minimum–maximum, maxima–minima or minima–maxima thermometer, of which it is the earliest practical design.
What is the use of the Stevenson screen?
They protect the temperature sensors from being influenced by direct or reflected sunlight. Stevenson screens are always painted white to better reflect the sun’s rays. The louvered sides allow outside air to flow around the thermometers.
How does a 6 thermometer work?
How The Six’s Thermometer Works. When the temperature increases alcohol in the left bulb expands and pushes the mercury in the U shaped bend towards the right tube where there is vacuum bulb. The vacuum bulb’s purpose is to allow mercury to be pushed towards it when alcohol expands in the right tube.
What is the use of dry-bulb thermometer?
The dry-bulb thermometer shows the current temperature, whereas the wet-bulb thermometer shows a somewhat lower temperature, the result of the latent heat of evaporation, which depends on the relative humidity of the air.
What are wet and dry-bulb thermometers used for?
An instrument used to measure the amount of water vapor or relative humidity in the air. It is a combination of wet- and dry-bulb thermometers mounted on a frame with a handle that allows it to be swung around to permit air to move across the psychrometer. See psychrometer.
What is maximum and minimum temperature?
The lowest possible temperature is -273 degree Celsius, or 0 Kelvin( Kelvin is a unit of temperature) Maximum temperature is the highest temperature at a place in a given time period . There is no limit for maximum temperature.
Why mercury is used in maximum thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
What are the uses of hygrometer?
hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity.
What is wet and dry thermometer?
a type of hygrometer consisting of two thermometers, one of which has a dry bulb and the other a bulb that is kept moist and ventilated. The difference between the readings of the thermometers gives an indication of atmospheric humidity. Also called: wet-and-dry-bulb thermometer.
What is difference between dry-bulb and wet bulb temperature?
The dry bulb temperature is the ambient air temperature that is measured by regular thermometers, while the wet bulb temperature is measured by thermometers that are wrapped in wetted wicks. The greater the wet bulb depression, the greater the felt effect is on the discharge air temperature.
What is the minimum temperature?
Zero kelvin (−273.15 °C) is defined as absolute zero.
What is the difference between maximum and minimum?
The minimum is the smallest value in the data set. The maximum is the largest value in the data set.
What are the uses of mercury and alcohol in maximum and minimum thermometer?
Measurement. Alcohol Thermometers: Alcohol thermometer is suitable for measurement of low temperatures. Mercury Thermometers: Mercury thermometer is suitable for measurement of high temperatures.