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2010-02-18 02:56:19
2010-02-18 02:56:19

The bore is the tube thing that the liquid is inside. It goes through the center of the whole thermometer.

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A bore refers to the extremely fine or narrow tube found in a thermometer. It is called a narrow bore or a capillary.


A thermometer includes a scale, the bore, the bulb, the steps, and coloured alcohol or as in the past:mercury.


To increase the sensitivity of the thermometer, that is, for the thermometer to respond quickly to small changes in temperature.


If you're the one designing the thermometer, you could make it longer or make the bore wider. If you've got an existing thermometer, there's not much you can do.



well clinical thermometers have thin capillary because to make the thermometer sensitive - by Tericiona in twitter


A so-called "glass" thermometer has a small bore-hole in the center of the glass that has some liquid in it. It's the activity of the liquid in the narrow hole that makes the thermometer a thermometer.


The narrower the bore the less liquid (mercury or alcohol) is required so the bulb containing the fluid will adjust more quickly to the temperature being measured. o.k well the narrower bore makes the liquid move slower up the thermometer so the accuracy is better ?????


using a thin capillary bore using a thick glass stem


So that it can regulate the flow of the rest of the liquid...i think :)


To hold the mercury so you have time to read the patient's temperature.


A lab thermometer normally is very long and has a wide range of measurement with uniform degrees spread out over the distance and has a mark showing how far into the measured substance it go to get accurate measurements.A clinical thermometer has a larger bore at the bottom where the contents can expand without measurement occuring then a tiny bore where the degrees are spread out at the body temperature. Thus at room temp, all the liquid is down in the big area and only as it gets up to 95 degree or so is the liquid expanded in the reading area. This allows the thermometer to be physically short and easy to handle while having wide degrees to be easy to read. There is also a trap so that the column separates leaving liquid in the tiny bore to read instead of dropping quickly on removal. The liquid has to shaken out of the tiny bore back into the big one.


When placed in boiling water, the materials comprising the thermometer respond in the order in which the heat penetrates them. As the heat first permeates the glass cylinder, the cylinder expands, enlarging the bore. For the moment until the mercury is also heated, the constant volume of mercury fills the expanded bore to a slightly lower depth. When the heat reaches the mercury and it also expands, its volume to increase, and the liquid depth rises in the bore.


Alcohol thermometerBeckmann differential thermometerBi-metal mechanical thermometerElectrical resistance thermometerGalileo thermometerInfrared thermometerLiquid Crystal ThermometerMedical thermometer (e.g. oral thermometer, rectal thermometer, basal thermometer)Mercury-in-glass thermometerReversing thermometerSilicon bandgap temperature sensorSix's thermometer- also known as a Maximum minimum thermometerThermistorThermocoupleCoulomb blockade thermometerPill Thermometerconventional glass thermometerdigital thermometertympanic thermometerBulb thermometerBaby thermometerIndoor thermometerOutdoor thermometerMeat and candy thermometerEar thermometerthermometer refrigeratorthermometer oventhermometer furnacegarden thermometerClinical ThermometerThermometer ForkLaboratory thermometersMedical thermometer


Alcohol thermometer Beckmann differential thermometer Bi-metal mechanical thermometer Electrical resistance thermometer Galileo thermometer Infrared thermometer Liquid Crystal Thermometer Medical thermometer (e.g. oral thermometer, rectal thermometer, basal thermometer) Mercury-in-glass thermometer Reversing thermometer Silicon bandgap temperature sensor Six's thermometer- also known as a Maximum minimum thermometer Thermistor Thermocouple Coulomb blockade thermometer Digital thermometer Oven cord thermometer Oven thermometer


A lab thermometer normally is very long and has a wide range of measurement with uniform degrees spread out over the distance and has a mark showing how far into the measured substance it go to get accurate measurements. A clinical thermometer has a larger bore at the bottom where the contents can expand without measurement occuring then a tiny bore where the degrees are spread out at the body temperature. Thus at room temp, all the liquid is down in the big area and only as it gets up to 95 degree or so is the liquid expanded in the reading area. This allows the thermometer to be physically short and easy to handle while having wide degrees to be easy to read. There is also a trap so that the column separates leaving liquid in the tiny bore to read instead of dropping quickly on removal. The liquid has to shaken out of the tiny bore back into the big one.


As the temperature rises, the mercury expands into a narrow bore, because the volume of the mercury increases. If the bore is very narrow then the extra volume has to go a longer way up the bore to accomodate that volume, so it is more sensitive to small changes of temperature. And it is easier to spot small changes of temperature, and read them from the scale more accurately. But if the scale isn't marked accurately in the first place you are no better off.


Clinical Thermometer -To measure the body temperature, a special thermometer, called the clinical thermometer is used. -This thermometer has to be given sharp jerk after measuring the thermometer. -In 1866 Sir Thomas_Clifford_Allbutt invented the clinical thermometer, Laboratory thermometer -This thermometer is generally used in laboratories for measuring temperature. -This thermometer does not has to be given sharp jerk after measuring the thermometer. -----------------------------------------------------------------------------------------------------


1. Alcohol or spirit thermometer 2. Mercury thermometer 3. Liquid crystal thermometer 4. Quartz thermometer 5. Reversing thermometer 6. Resistance thermometer


Rifled bore and Smooth bore


In Full bore ball valve, The bore dia will be same as internal dia of the pipe.In reduced bore, the bore dia is reduced than the ID of pipe.


a thermometer thermometer a thermometer



Some examples are Mercury Thermometer, Alcohol thermometer and digital thermometer.


gas thermometer are more sensitive then liquid thermometer



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