A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts because the temperature rises or falls. The tiny size of the bulb and micro-fine size of the tube help the mercury reach the temperature of what it’s measuring very rapidly. Keep reading how does a thermometer measure temperature.
Bulb thermometers: follow the straightforward principle that liquids change their volumes relative to their temperature. As temperatures rise, the mercury-filled bulb expands into the capillary.
Its rate of expansion is calibrated on the glass scale. Two different scales are often found on thermometers–the Fahrenheit scale and therefore the Celsius scale. With the Fahrenheit scale, Daniel Fahrenheit decided that the freezing and boiling points of water would be separated by 180 degrees and he pegged freezing water at 32 degrees.
How Does a Thermometer Measure Temperature
So he made a thermometer, stuck it in freezing water, and marked the extent of the mercury on the glass as 32 degrees. Then he stuck an equivalent thermometer in boiling water and marked it 212 degrees. He then put 180 evenly spaced marks between those two points.
On the Celsius scale, Celsius decided that the freezing and boiling points of water would be separated by 100 degrees and he made the melting point of water at 100 degrees. Bulb thermometers are most ordinarily found in two places outside on our porches measuring the temperatures outside or under our tongues measuring our bodily temperatures.
With the age, the technology came the invention of other sorts of thermometers. Each different sort of thermometer has its own distinctive means of measuring or controlling temperature.
For instance, electrical device thermometers are extremely effective for controlling temperatures. Although bulb thermometers are good for measuring temperature accurately, they’re harder to take care of set temperatures.
While bulb thermometers measure our changing temperatures once we feel feverish, electrical device thermometers help us bake our favorite cakes by maintaining a group temperature in ovens.
The bimetallic strip thermometer, because it is made of metal, is good at maintaining the same temperature for a long period of time. Recent technology has created new ways to live temperatures with electronics. The most common device is understood as a thermostat. This sensor changes its resistance with changes in temperature.
A computer or other electronic circuit measures the resistance and converts it to a temperature, either to display it or to make decisions about turning something on or off. Read how does a thermometer measure temperature.
Why should I take my temperature?
Checking your body’s temperature with a thermometer is a simple thanks to seeing if a fever is present. A fever, which is a rise in the body’s temperature, is usually caused by an infection. Though fevers are often uncomfortable, they’re a symbol that the body is fighting off infection.
There are many various sorts of thermometers you’ll use to live temperature. When using any quiet thermometer, confirm you read and follow the instructions that accompany the thermometer. If your thermometer uses batteries, check them. You might notice that weak batteries give inconsistent readings.
What is a normal body temperature?
Normal blood heat is about 98.6 degrees Fahrenheit (°F) or 37 degrees Celsius (°C). The normal temperature often varies from 1° to 2°F (½° to 1°C). A normal temperature is typically lower within the morning and increases during the day. It reaches its high within the late afternoon or evening.
What temperature is considered a fever?
In adults, a fever is taken into account to be a temperature of 100.4°F (38°C) or above. You can treat this at home with a fever reducer medication and fluids to make yourself more comfortable, or let it run its course. But if it reaches 102°F (38.8°C) or higher and home treatment doesn’t lower it, call your healthcare provider.
How do I take a temperature with a thermometer?
Using a Digital Oral Thermometer
1. Wash your hands with soap and warm water.
2. Use a clean thermometer, one that has been washed in cold water, cleaned with rubbing alcohol, and then rinsed to remove the alcohol.
3. Do not eat or drink anything for at least five minutes before you take your temperature because the temperature of the food or beverage could make the reading inaccurate. You should keep your mouth closed during this point.
4. Place the thermometer tip under the tongue.
5. Hold the thermometer within the same spot for about 40 seconds.
6. Readings will continue to increase and the F (or C) symbol will flash during measurement.
7. Usually, the thermometer will make a beeping noise when the ultimate reading is completed (usually about 30 seconds). If you’re keeping track, record the temperature and thus the time.
8. Rinse thermometer in cold water, clean it with alcohol and rinse again.
How often should I take my temperature?
If you’re feeling ill or if your child seems to be ill, it’s likely that you simply will reach for your thermometer. Often one of the first questions a health provider asks is that if you’ve taken the temperature of the one that’s ill. You may decide to take medicine to reduce fever.
If you do, there’s usually a period of your time on the instructions about when it’s safe to require the drugs again. (This is usually a period of about four to six hours.) Before taking another dose, check your temperature or your child’s to see if medicine is really needed.
However, if the primary temperature is extremely high, you would possibly plan to recheck the temperature on a more regular schedule, maybe once or twice an hour. You might decide to recheck temperatures when medicine doesn’t seem to be working, like when the illness isn’t recuperating, and you still have symptoms.
Your healthcare provider might recommend times to need your temperature, like mornings and evenings. You should keep a record of those temperatures to be ready to report back.