How does digital thermometer measure the temperature without mercury?

Digital thermometers contain a small computing mechanism and a resistor. A change in temperature causes the sensor to notice a change in resistance. The computer converts the difference in resistance into a difference in temperature and offers a digital readout in degrees.

What do they use instead of mercury in thermometers?

The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly.

Is digital thermometer does not use mercury?

Unlike traditional thermometers, digital thermometers do not use mercury. Mercury thermometers work on the principle that a rise in temperature can cause the mercury to expand, which can be used to measure the temperature of the body.

What is the difference between a mercury thermometer and a digital thermometer?

Mercury thermometers readings are slower to realize because we have to wait for the mercury to heat and then slowly rise to display the temperature whereas digital thermometers are designed using advanced technology that enables them to provide instant results on the spot, which means no more waiting for crawling hot …

Are digital thermometer more accurate than mercury?

The digital thermometer is not only faster on body temperature measurement results providing, but also better accuracy results to us. Based on the tested records of the experiments, the accuracy of a digital thermometer could be 0.1℃. The accuracy is better than the normal mercury thermometer.

Are non-mercury thermometers accurate?

Scale Divisions and Accuracy Limits Non-mercury thermometers have scale divisions equal to mercury thermometers. Most range from 0.5° to 1° C. Accuracy limits for non-mercury thermometers below 150° C are also compatible with mercury thermometers; accuracy is typically ± 1° – 2° C.

What is the advantage of using the digital thermometer as compared to the traditional thermometer?

Digital thermometers provide faster results Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature.

How accurate is the digital thermometer?

Digital thermometers provide accurate readings in about 1 minute or less.

Does digital thermometer gives accurate temperature?

A digital thermometer is the most accurate and quickest way to take a temperature. Digital thermometers are available in most drug stores and supermarket pharmacies.

How accurate is a digital thermometer?

Are digital thermometers more accurate than mercury thermometers?

How does a mercury thermometer work?

Mercury thermometers are based upon the practical phenomena that mercury expands with temperature. A small amount of mercury in a reservoir is subject to heat and it expands and pushes the mercury up a capillary (thin) tube so we can easily see the expansion against a physical scale.

How does a digital thermometer work?

Digital thermometer primarily relies on the principle of electrical resistance of the metal that is dependent on the temperature. The resistance increases with the rise in temperature. A voltage passes through an electrode that measures the current and the microchip in the digital thermometer converts that measurement into a digital reading.

A primarily clinical trial has been undertaken to investigate and compare the use of mercury and digital thermometers in a ward situation. Both laboratory and clinical studies show that there is no significant difference in the average accuracy of the two types of thermometers, however there is a gr …

Is there any clinical trial on the use of mercury thermometers?

A primarily clinical trial has been undertaken to investigate and compare the use of mercury and digital thermometers in a ward situation.