how to increase range of thermometer igcse

2020-11-13T12:14:31+00:00

Liquid-in-glass thermometer properties How the structure of a liquid-in-glass thermometer affects its sensitivity, range and linearity GCSE Keywords: Bulb, Thread diameter, Liquid, Glass thickness Characteristics that make a substance suitable for use in a liquid-in-glass thermometer include: There are several types of thermometer including the. It is calculated in meter/degree Celsius. To increase sensitivity: (a) make the bore smaller (b) … This website uses cookies to improve your experience. The sensitivity of a thermometer is defined as the increase in the length of the mercury column per unit increase in temperature. The sensitivity of a thermometer can be increased by Using a thermometer with a smaller bulb – A smaller bulb contains less mercury and hence absorbs heat in shorter time. Structure and advantages of a thermocouple. The change in pressure is used The liquid crystal thermometer – it contains heat-sensitive liquid crystals that change colour to indicate different temperatures. The range of a liquid-in-glass thermometer is limited by the length of the thermometer and can be increased by: increasing the diameter of the capillary – this means that the liquid will not expand as far along the tube per GCSE Keywords: Bulb, Thread diameter, Liquid, Glass thickness. We also use third-party cookies that help us analyze and understand how you use this website. The range of a liquid-in-glass thermometer is limited by the length of the thermometer and can be increased by: increasing the diameter of the capillary – this means that the liquid will not expand as far along the tube per degree rise in temperature. A liquid-in-glass thermometer is said to be. We'll assume you're ok with this, but you can opt-out if you wish. a low freezing and high boiling point so that the substance remains liquid over a good range of temperatures. -5 ℃ to 70 ℃. It would have to be marked with degrees of differing sizes (as above). tube as it is heated. decreasing the volume of the bulb – this means there is less liquid and so it will not travel as far along the capillary Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. If the liquid did not expand uniformly, the scale would be non-linear. To increase range: (a) make the thermometer stem longer (b) make the bore(capillary) bigger (c) use a liquid with a lower expansivity. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. It is mandatory to procure user consent prior to running these cookies on your website. A glass bulb with thinner wall – Heat can be transferred to the bulb easily. expanding uniformly over a large temperature range, a low specific heat capacity for quick response. But opting out of some of these cookies may affect your browsing experience. These cookies do not store any personal information. You also have the option to opt-out of these cookies. Thermistors Thermistors work over a small range, ie. It's resistance decreases with temperature. degree rise in temperature. Capillary with narrow bore – produces a greater change in the length of the mercury column. The range of a thermometer, on the other hand, refers to the dissimilarity between the maximum and the minimum temperature. It works over a wide rang of temperatures, and is bulky. (1) sensitivity by increasing bulb size (& hence the thermometric liquid) OR by reducing bore diameter (2) responsiveness (and its not "responsitivity") by … to indicate a change in temperature. This category only includes cookies that ensures basic functionalities and security features of the website. This website uses cookies to improve your experience while you navigate through the website. 17. Thermochromic Liquids The constant-volume gas thermometer – it contains a gas; when the temperature rises, the pressure increases. Constant-Volume Gas Thermometers Constant-Volume Gas thermometers use the change in pressure of a gas to measure temperature. Anything that makes it easier to detect small changes in temperature increases the precision, or sensitivity of a liquid thermometer; Some of the factors which increase sensitivity are: Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Necessary cookies are absolutely essential for the website to function properly. These cookies will be stored in your browser only with your consent. They have low freezing points and high boiling points, allowing them to be used over a greater range of temperatures; Sensitivity is another word for precision. This website uses cookies to improve your experience while you navigate through the website. It would be very difficult to calibrate and to use. 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