It does not matter what sort of you choose, you must go with the manufacturer’s instructions quite carefully. Your thermometer would not be giving accurate results if it is not used ideally.
It does not need to go with a thermometer on a person which is meant for another purpose including as a laboratory or meat thermometer. It would not impart accurate readings.
Digital Thermometer
The most important thing is that digital thermometers work by going with heat sensors which determine body temperature. They can easily be used to take temperature readings in the mouth, armpit and rectum. Considering digital thermometer readings, you need to keep in mind that armpit temperature runs about ½ to 1°F (0.6°C) cooler in comparison to other oral readings.
Advantages
The best thing is that digital medical thermometers help a lot in the context of accurate reading in about 60 minutes or less.
Drawbacks
In order to have an accurate reading from oral use, the tip of the device is needed to be placed under the tongue following the mouth completely closed. It would not be able to take an ideal reading if they are taken too close to eating or drinking.
Oral Thermometer
Oral temperature can truly be taken by either a digital or mercury thermometer. Talking more about it the average oral temperature reading is 98.6°F. Though, any oral temperature from 97°F (36.1°C) to 99°F (37.2°C) is regarded as typical. While using oral medical thermometers, you need to keep in mind what your temperature is since some people remain cool while some are slightly warmer. It is an ideal idea to understand what your temperature is typically so that you can easily assess if you are running a fever when you feel sick or not.
Advantage
Oral thermometers are quite accurate in kids over 3 years and adults.
Drawbacks
Some kids and people having breathing issues probably not be able to have their mouths closed long enough in order to have an accurate reading.
Digital Ear Thermometer
The tympanic thermometer measures the temperature inside the ear canal through infrared ray-oriented technology. Tympanic readings are 0.5°F (0.3°C) to 1°F (0.6°C) higher in comparison to the oral temperature readings.
Advantages
The most important thing is that tympanic thermometers impart fast as well as accurate readings and probably be preferable to oral or rectal thermometers.
What About The Disadvantages
Because of the size of the ear canal, a tympanic thermometer is not recommended for infants under 6 months old. Because of the size of the ear canal, tympanic thermometers are not recommended in the context of infants under six months old. They must be positioned ideally in order to have accurate results. Obstructions such as earwax probably skew results.
Conclusion
Go with the ideal thermometer considering the benefits accordingly. You may buy online or offline accordingly.