THERMOMETER The thermometer is used as an “instrument for measuring temperature.” “Thermo” is a prefix related to heat, and “meter” is a suffix used for any measuring device. What is a normal body temperature? The normal body temperature is about 98.6 degrees in Fahrenheit (° F) or 37 degrees in Celsius (° C). Normal body temperature is usually lower in the morning and higher during the day. It reaches its peak in the late afternoon or in the evening. Primary and secondary thermometers Depending on how the measured gross physical quantity is assigned to the temperature, the thermometer is called primary or secondary. “For the primary thermometers, the measurement properties of the matter are well known, so that the temperature can be calculated without unknowns. For example, the thermometer based on the equation of state of a gas, the speed of sound in a gas , thermodynamics, noise voltage or current of a resistance, and the angular anisotropy of gamma rays emitted by certain radionucl...
THE BIOMEDICAL ENGINEER