The mercury rises into the capillary tube. Clinical thermometer is a slight modification of mercury thermometer. The tube is calibrated. It has a constriction in the fine capillary tube. A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature. The functionality ... Capillary. Clinical thermometers, also known as medical thermometers or doctors' thermometers, are used to take body temperatures in humans and animals 1 2. The bulb is the basis of mercury thermometers. Traditional thermometers use thermometric liquids (i.e., alcohol, mercury) to measure temperature in body cavities -- orally, rectally, vaginally -- or at other axillary points, such as the underarm 1 2. The body is the glass tube that covers the stem. Infrared Thermometer . The liquid is contained in a thin-walled glass bulb. It is at the bottom and is cylindrical or spherical depending on the artifact. It has a bulb with mercury, a kink to avoid rapid fall of mercury which gives us time to record the measurement. Clinical thermometer; A thermometer used to determine the temperature of the human body. The normal human body temperature is 37˚C; which can fluctuate between the ranges 35˚C to 42˚C. A medical thermometer has a constraint close to the bulb in it. Clinical Thermometer. Clinical thermometers are meant for clinical purposes. Bulb. Body. The tip of the thermometer is inserted into the mouth under the tongue (oral or sub-lingual temperature), under the armpit (axillary temperature), into the rectum via the anus (rectal temperature), into the ear (tympanic temperature), or on the forehead (temporal temperature). This helps the mercury in the bulb to obtain the patient’s temperature more rapidly and exactly. The narrow bore of the capillary tube is uniform. It is specially designed to measure the human body temperature. Thermometer parts. Structure: It is smaller in size than the laboratory thermometer. Bulb of laboratory thermometer is usually larger than its bore in order to contain more liquid, to improve its sensitivity.That's why its more precise as even a small change in temperature will make the liquid to rise in the capillary tube. The bulb is made relatively larger than its bore to contain more of the liquid, so as to improve sensitivity. In Fahrenheit, the thermometer … It is a long narrow glass tube with a bulb containing mercury at the end. Laboratory thermometers are designed small to make it potable. The more functions you have, the higher your cost. Structure: The thermometer is made relatively small so that it is portable and cheap. The infrared thermometer, also known as infrared pyrometer or non-contact thermometer, differs from other types of thermometers by measuring the thermal radiation and not the temperature as such. A clinical thermometer is generally used in hospitals to measure human as well as animal’s body temperature. It is developed for measuring the human body temperature.