A maximum-minimum thermometer works by registering the maximum and minimum temperatures over a certain time period by using two scales set in liquid mercury. Two bulbs filled with alcohol or oil regulate the movement of the mercury.Know More
Maximum-minimum thermometers are typically U-shaped parallel tubes of glass. One side registers the minimum temperature, while the other registers the maximum temperature since its last reading. The bend at the bottom of the thermometer contains the liquid mercury, which moves up and down based on contractions of the oil or alcohol located in the two bulbs at the top of the thermometer. The contractions of the alcohol or oil are the result of thermal changes in the environment causing it to expand or contract.
The oil or alcohol pushes the mercury in both tubes to record certain temperature readings, which are marked by steel indexes in the tubes that are held in place by small springs. The indexes are located on the surface of the mercury and move when the mercury is pushed by the oil or alcohol. When the temperatures reach their minimum and maximum, the steel indexes remain in place. This allows for the readings of both the minimum and maximum temperatures simultaneously without constant monitoring of the thermometer. The steel indexes can be returned to the surface of the mercury by using small magnets.Learn more about Thermodynamics
A thermometer is usually calibrated using two approaches: the ice point method and the boiling point method. This temperature measuring deviceÂ must be calibrated daily if repeatedly used. Otherwise, a thermometerÂ should be adjusted prior to itsÂ initial usage, when switching from one temperature to another or every time itÂ is dropped.Full Answer >
TaylorUSA.com sometimes provides manuals for Taylor thermometers. Not every Taylor thermometer product on the website, however, has a complete manual available. If the manual is not available on the site, check ManualsOnline and ManualsLib for more downloadable instruction books and user guides for Taylor thermometers.Full Answer >
Thermistors measure temperature as a function of change in potential difference at constant current or a change in current at constant temperature. These temperature sensors are constructed of semiconductor materials, and their resistance is either a direct or inverse function of temperature.Full Answer >
Thermal energy is used to describe energy in a heated form. Thermal energy is transferred in three different ways: radiation, conduction and convection.Full Answer >