A clinical thermometer is a thermometer used to measure human body temperature.Most made in the 20th century are mercury-in-glass thermometers. It takes several tens of seconds to record one reading. This thermometer has the markings from 35°C to 42°C. Structure of Clinical Thermometer. Example Definitions Formulaes. A clinical thermometer has a kink or a constriction in … A labeled diagram shows an image of the device and all parts including he tube and bulb are labeled. The round glass stem around the capillary tube is made thick. A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled.A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion. The bulb is made relatively larger than its bore to contain more of the liquid, so as to improve sensitivity. The narrow bore of the capillary tube is uniform. The narrower the bore, the higher the sensitivity. Liquid-in-glass thermometers are based on the principle of thermal expansion of substances. Notify me of follow-up comments by email. An ear thermometer was invented in the 1960s, which works quickly and easily. Structure: The thermometer is made relatively small so that it is portable and cheap. Most show both Celsius scale and Fahrenheit temperature scales, and run from 35 degree Celsius to 42 degree Celsius. Mercury expands quite uniformly over a good range of temperatures. Gr8 help…seriously..^-^.. This kink is called the constriction. Quick summary with Stories. The temperature scale is marked outside the glass tube of the thermometer. The club-like spikes projecting out from their surface gave them the name. The narrow bore of the capillary tube is uniform. View Answer. It acts as a magnifying glass. Alcohol expands non-linearly over different range of temperatures. Administrator of Mini Physics. Your IP: 126.96.36.199 One end of this tube is sealed and the other end has a glass bulb filled with mercury. Mercury reacts quickly to the temperature changes whereas alcohol reacts slowly. Structure of laboratory thermometer. Thermometer types. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Range is the converse of sensitivity, i.e., the longer the range, the lower is its sensitivity. Most made in the 20th century are mercury-in-glass thermometers. • Mostly thermometers made in the 20th century are mercury thermometers. In the 20th century, the traditional clinical thermometer was a mercury-in-glass thermometer.People put the end of this in their mouth (oral temperature), under their arm, or in their rectum (rectal temperature).It is only possible to find oral temperatures on patients who can hold the thermometer … From Simple English Wikipedia, the free encyclopedia, https://simple.wikipedia.org/w/index.php?title=Clinical_thermometer&oldid=7158511, Creative Commons Attribution/Share-Alike License. 24 hour clock is used in the airline ticketing When are approximations necessary in daily life why is pendulam not used for time? In colder countries, most of its liquid-in-glass thermometers use alcohol and not mercury. The liquid is contained in a thin-walled glass bulb. Sorry, your blog cannot share posts by email. Cloudflare Ray ID: 5f86b0208a189ace As the liquid is contained in a thin-walled, small glass bulb, it will be more responsive (faster response) to heat. It has a slight bend or kink in the stem just above the bulb. This page was last changed on 24 October 2020, at 12:25. The bulb is made relatively larger than its bore to contain more of the liquid, so as to improve sensitivity. The range can be increased by lengthening the bore. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Answer in brief Q.3 state the principal of a mercury thermometer How to convvert celcius and kelvin scale What is Density .? Small expansion of the liquid in the liquid bulb will cause a big change in the length of the liquid thread in the capillary tube as it is made narrow. A clinical thermometer consists of a long narrow glass tube. clinical thermometer; A Medical thermometer is used to measure body temperature. Another way to prevent getting this page in the future is to use Privacy Pass. They are accurate and sensitive, having a narrow place where the mercury level rises very fast. Main Types of thermometer are given in the list below: Clinical or Medical thermometers. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to email this to a friend (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Skype (Opens in new window), Differences between boiling and evaporation, Case Study 2: Energy Conversion for A Bouncing Ball, Case Study 1: Energy Conversion for An Oscillating Ideal Pendulum. Medical thermometers are cleaned before and after each use, with alcohol. 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