Which liquid is filled in thermometer?
Which liquid is filled in thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
Are liquid thermometers more accurate?
Liquid-in-glass thermometers without mercury are not as accurate, so they should be used when less precision and certainty is acceptable. However, analog alternatives, liquid-in-glass thermometers, and bimetal thermometers are the most economical options, with prices, as of this writing, often under $50.
Do oven thermometers have mercury?
There are two types of oven thermometers: one with a dial face and the other with a glass bulb (for safety reasons, the bulb is filled with colored alcohol rather than mercury).
What is the blue liquid in a thermometer?
The blue spirit thermometers listed contain non-toxic isoamyl benzoate and dye. These thermometers can be stored horizontally; their separation rate is equal to or better than mercury thermometers.
How do liquid filled thermometer work?
Liquid-in-glass thermometers are based on the principle of thermal expansion of substances. A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled. A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion.
What are the disadvantages of liquid in glass thermometer?
Disadvantages. Liquid in glass thermometers tend to be fragile and hence easily broken, can only be used where the liquid column is visible, cannot be used for surface temperature measurements, cannot be read from a distance and are unsuitable for high temperature measurements.
What are the advantages and disadvantages of liquid in glass thermometer?
| THE LIQUID-IN GLASS THERMOMETER | |
|---|---|
| Advantage | Disadvantage |
| no power source required | limited to applications where manual reading is acceptable, e.g. a household thermometer |
| repeatable, calibration does not drift | have a limited useable temperature range |
| easy to use & cheap | cannot be digitised or automated |
Are mercury thermometers still available?
Mercury Thermometers Are Going Extinct.
Can you suggest alternatives to mercury thermometers?
(c) Other alternatives to mercury thermometers are Digital thermometers and Spirit thermometers.