Note: Clinical thermometers must be sterilized before use for the safe and clean check-up. Mercury expands quite uniformly over a good range of temperatures. The thermometer is then kept under the tongue or under the arms in order to get the reading on the thermometer. Other Suggestions . This method is common when the temperature needs to taken from the children as it is quick. For e.g. The thermometer is then held close to the eye as shown in figure 3 in order to see the correct reading. Digital thermometers can be considered to be advanced thermometers that are used for measuring body temperature. As a laboratory thermometer is more complex, it yields more accurate results as compared to a clinical thermometer. Now, this value is multiplied by the value of one division (which is 0.2 in this case). What is the measure or basis for that hotness? the thermometer is read. Place the tip of the thermometer under the armpit. In colder countries, most of its liquid-in-glass thermometers use alcohol and not mercury. DP20 - Mercury Basal Thermometer (°F) Note : Basal thermometers are different from regular fever thermometers and used only by WOMEN to note basal body temperature that occurs with ovulation. After use, clean the tip of the thermometer with cotton and alcohol. 3) Location Clinical thermometers are often used in various locations like houses, clinics, and hospitals while lab thermometers are mainly located in laboratories. This kind is still popular where people like to read temperature from a distance. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances. 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The thermometer is washed with water at a normal temperature. It acts as a magnifying glass. A laboratory thermometer is a tool used in laboratories to measure temperature with high accuracy. The narrow bore of the capillary tube is uniform. He is also credited for the invention of the mercury-in-glass thermometer. For mercury thermometer: -39 to 357°C For alcohol-in-glass thermometer: -115 to 78°C; In colder countries, most of its liquid-in-glass thermometers use alcohol and not mercury. The liquid that is used in the thermometer needs to have some properties, and they are listed below: The thermal expansion of the liquid must be uniform. Mercury is in a liquid state at room temperature and has the highest coefficient of expansion. Made with | 2010 - 2020 | Mini Physics |. It ranges from -10˚C to 110˚C. Thermometers such as mercury thermometers, alcohol in glass thermometer, constant pressure gas thermometers, and platinum resistance thermometers are designed on the basis of technology. The tip of the thermometer should be placed inside the ear pointing towards the nose. The round glass stem around the capillary tube is made thick. Notify me of follow-up comments by email. Figure 2-1. Facts about Laboratory Thermometer 5: scale. The liquid is contained in a thin-walled glass bulb. Following are the different types of thermometers that we use on a daily basis: Clinical thermometers are meant for clinical purposes. Therefore, even the slightest change in temperature is notable. For the first time I am watching education with visualising. Range is the converse of sensitivity, i.e., the longer the range, the lower is its sensitivity. On the other hand, Temperature is the measure of that heat. C Reading the Fahrenheit thermometer. It is a long narrow glass tube with a bulb containing mercury at the end. These thermometers are used for measuring the temperature by the means of an electronic circuit. Checking the body temperature using the inside of the ear is known as tympanic membrane temperature. This is just gr8….cn learn more abt Physics anywhere!! The range of a laboratory thermometer is generally from - 20 o C (Fig-3). 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