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1800-102-2727The device that measures temperature is the thermometer. The Greek word thermos means hot and, metron indicates measure. A tapering glass tube makes up a thermometer with a bulb at one end. Mercury (a liquid metal) is present inside the channel. It stays in a liquid state while at room temperature. A minimum alteration in the temperature can lead it to expand or contract. Heat is a form of energy, and the thermometer's primary function includes heat measurement. The mathematical depiction of heat is the temperature. The thermometer has different types according to its uses.
For temperature measurement, there are three units: Celcius (C°), Fahrenheit (F°), and Kelvin (K).
According to their needs, thermometers are of different types. This guide addresses two significant ones: Clinical thermometer and Laboratory thermometer.
A clinical thermometer serves clinical purposes and measures human body temperature. The standard human body temperature is 37°C that might swing between 35°C and 42° C and, the mercury level determines the body temperature in °C. Considering the toxicity of mercury, digital thermometers are more in use nowadays in place of clinical ones. Note: It is compulsory to sterilize the clinical thermometer before usage to ensure a safe check- up.
The working methodology of a clinical thermometer is simple. After sterilizing, a person places the thermometer inside the patient's mouth to measure the temperature. The body heat leads the mercury inside the tube to expand and, it flows through the capillary cord at a particular level. The kink restricts the mercury flowing back after the thermometer is taken out from the patient's mouth. Bringing back the mercury at its original position requires a steady jerk for a few minutes.
Mercury is a poisonous metal. Accidentally, if the glass tube breaks during the temperature reading, the liquid can leak inside the mouth. It is the reason why most people use Digital thermometers or scanner thermometers nowadays.
Better known as a lab thermometer, this device helps measure any temperature other than the human body. It ranges between -10°C and 110°C. Laboratory thermometers primarily serve lab purposes like measuring freezing and boiling points and checking the temperature of other substances. The temperature of a solvent is also measured with a laboratory thermometer. Even weather reporters prefer using laboratory thermometers to measure the minimum and maximum temperature of a place.
Differences between Clinical and Laboratory Thermometer
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The German physicist Daniel Gabriel Fahrenheit is the father of the thermometer and inventor of the modern mercury thermometer. He was a worshipper of science and inventions. Fahrenheit also invented the mercury-in-glass thermometer.
1: What are the similarities between a clinical and laboratory thermometer?
Ans: Both the thermometers comprise a narrow glass tube having mercury at the extreme point. Even, Celsius scale is also present in these thermometers.
2: What does the kink do in a clinical thermometer?
Ans: The kink prevents the mercury from flowing back to the bulb after the thermometer comes out of the patient's mouth.