thermometer
thermometer
What kind of thermometer you use to measure the body temperature
Doctors use body temperature thermometers to measure body temperature.
thermometer
A thermometer is used to measure the temperature of hot water.
termometer
human body temperature,to measure it
A thermometer, of which there are literally thousands of different kinds depending on their intended application.
Clinical thermometer
You could use an ear thermometer or a tongue thermometer or a forehead thermometer or a rectal thermometer or even a liver probe im some situations. But to answer the question body temperature is taken whenever someone is thought to be ill as it is generally a noninvasie tool to assist diagnosis.
If you do not use a thermometer to measure temperature, then you have no way of knowing exactly what the temperature is, either of the air, or of the turkey you are baking, or of your refrigerator, or of your own body (if you have a fever) or of various other things for which you might have a reason to want to know the temperature.
Body fat calipers are a useful tool. There are many models on the market today. Be sure to carefully read any instructions that come with the tool so that you will know the correct way to use the tool. If you use body fat calipers correctly these are a reliable and accurate way to measure body fat on certain areas of the body.