Generally thermometers are calibrated two ways . primary calibration or Secondary calibration. In secondary calibration , two thermometers are kept side by side under same conditions and identify the difference with respect to one thermometer. In primary calibration , thermometer that to be calibrated is placed in a ice cubes made of pure distilled water . Now pour some distilled water and stirr well . Now place thermometer inside that mixture This will give the Melting point temperature of pure water 0 degree centigrade. Now see the reading on thermometer and adjust reading. This way of calibrating a thermometer is accurate enough form most applications.
AnswerAlcohol can be used in some thermometers due the fact of its very low freezing point. It may be used in cold atmospheres such as freezers. It however would not be suitable in vey hot atmostpheres due to the boiling point. because of it's very low freezing point
boiling
what is the boiling point of water
how about water, or Mercury as used in thermometers. both conductive.
Clinical thermometers are not used to measure the temperature of boiling water! They have a range of about 35oC to 43oC and they will explode at a temperature of about 100oC! Ordinary laboratory thermometers are used.
Thermometers may be calibrated in degrees Fahrenheit or degrees Celsius.
Calibrated
Temperature is measured with thermometers that may be calibrated to a variety of temperature scales
The homemade ones have not been calibrated while the commerical ones have been.
yes its possible in zone iv as there boiling water temp is 100 degree celcius n freezing 0 degree celcius.
Most medical electronic thermometers are not calibrated to measure ambient temperatures.
Generally thermometers are calibrated two ways . primary calibration or Secondary calibration. In secondary calibration , two thermometers are kept side by side under same conditions and identify the difference with respect to one thermometer. In primary calibration , thermometer that to be calibrated is placed in a ice cubes made of pure distilled water . Now pour some distilled water and stirr well . Now place thermometer inside that mixture This will give the Melting point temperature of pure water 0 degree centigrade. Now see the reading on thermometer and adjust reading. This way of calibrating a thermometer is accurate enough form most applications.
The main reason that mercury or alcohol is used in thermometers instead of water is due to the fluctuations that are seen in the boiling and freezing points of water which vary with pressure. Water is also used as a standard by which the thermometer is calibrated by. Alcohol's low freezing point makes it perfect for measuring low temperatures, but it's low boiling point means that high temperatures are hard to measure. Plus, it expands very nicely within the capillary tubes in which it is held. Mercury's low freezing point and high boiling point make it ideal for measuring most temperatures. However, mercury is also very expensive and dangerous.
So that you know that they show the true value, and that the results collected with one thermometer can be compared with the result collected from another thermometer.
The Celsius scale is calibrated so that zero Celsius is the freezing point of water at sea level, and one hundred degrees Celsius is the boiling point of water at sea level.
A good thermometer for measuring the temperature of boiling water is one that is calibrated so that 100oC is in the mid to upper range of the scale. A typical alcohol thermometer usually works nicely.