Table of Contents
Are mercury thermometers accurate?
Mercury thermometers provide accurate temperature readings and can be used orally, rectally, or under the arm. They don’t require batteries.
Is mercury thermometer more accurate than digital?
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 greater fluctuation of readings of temperature when using electronic thermometers.
How long do you keep a mercury thermometer in your mouth?
After shaking the mercury down, place the thermometer under the child’s tongue, with the bulb toward the back of the mouth. Tell your child to keep the lips firmly closed, but not to bite the thermometer. 3. Leave the thermometer in place for 3 minutes.
How long should I keep the mercury thermometer under my tongue?
Place the thermometer tip under the tongue. Hold the thermometer in the same spot for about 40 seconds. Readings will continue to increase and the F (or C) symbol will flash during measurement. Usually, the thermometer will make a beeping noise when the final reading is done (usually about 30 seconds).
What is the maximum temperature that can be measured by mercury thermometer?
Physical properties. Mercury thermometers cover a wide temperature range from −37 to 356 °C (−35 to 673 °F); the instrument’s upper temperature range may be extended through the introduction of an inert gas such as nitrogen.
How long do you leave a mercury thermometer in your mouth?
What is the most reliable thermometer for adults?
Our pick. Vicks ComfortFlex. A reliable stick thermometer.
What is the most accurate way to take a temperature?
Rectal temps are the most accurate. Forehead temps are the next most accurate. Oral and ear temps are also accurate if done properly. Temps done in the armpit are the least accurate.
Are mercury thermometers the most accurate?
The Rectal Thermometer is handy, provided with a short probe and is used for measuring rectal temperatures. Having mercury-in-glass construction, these thermometers are designated to be the most accurate ones.
How dangerous is mercury from a thermometer?
Mercury is highly poisonous, and the mercury inside of a thermometer can have dangerous health effects if you are exposed to it directly. Mercury is a toxin that affects the neurologic system of your body; its vapor can cause mood swings, insomnia and memory loss, and high vapor levels can damage organs.
Which thermometer is most accurate?
Rectal thermometers are the most accurate. If suitable, you should try to use either of these methods, especially for younger children. When a baby is an infant, having a temperature reading that’s even a few degrees off might make the difference of needing a trip to the hospital or not. Oral thermometers are also accurate.
What is the principle of a mercury thermometer?
The Basic Principle of a Mercury Thermometer All thermometers work on the principle that warm fluids occupy more space than cold fluids . Since we know how much space a fluid such as mercury will fill at any given temperature, we are therefore able to determine the temperature of that fluid by measuring how much space it takes up.