The rate and extent to which chemical reactions occur

Medical digital thermometers generally need to be extremely hygienic and easy to sanitise, for obvious reasons. They also tend to be relatively portable, as they’ll frequently need to be carried around from site to site, and yet accuracy and speed of readout is often critical.
Many medical digital thermometers include combination probe types, which makes them usable for various different methods of body temperature reading other than the standard oral digital thermometer type. These are often removable and interchangeable for additional hygiene and ease of cleaning.

Forehead Thermometer

The forehead thermometer is also known as the temporal artery thermometer. It uses infrared technology to detect the temperature of the temporal artery on your baby’s forehead. For most you simply swipe the thermometer across your baby’s forehead or gently press the probe against the babies temple and voila! You have a reading.
For newborn infants younger than 3 months, rectal digital thermometers have been acclaimed as the most accurate. The issue here of course is ease of use and discomfort for baby. New studies, however, indicate that the forehead thermometer can be reliably used with newborns.

Advantages of the Forehead Thermometer

1. 
   Easy to Use You simply swipe the thermometer across your baby's forehead or press it against the temple (be sure to read the exact instructions for each thermometer as this may vary slightly). Whether your baby is fussy or fast asleep, the forehead thermometer is non-intrusive and super easy to use.
   
2. 
   2. Fast The forehead thermometer enables you to get your baby’s temperature reading in a flash. Most forehead thermometers will produce a beeping sound when they are done taking the reading. Time is always of the essence especially with a sick child and this thermometer ensures you do not waste any.
   

Disadvantages of the Forehead Thermometer

1.