The bend at the bottom of the thermometer contains mercury which moves up or down based on the expansion and contraction of alcohol. Apparatus Description: The six’s thermometer consists of a U-shaped capillary tube with the bulbs at both ends; The bend of the U shaped-tube is filled with mercury Now many weather stations are equipped with electronic instruments. (If the markers are not reset, they will register maxima and minima only if they exceed the values already encountered. If the two readings are not the same, then the instrument scales are not correctly positioned or the instrument is damaged.[2]. They can be used to measure air temperatures. Digital Display Max Min Greenhouse Thermometer Garden Indoor Outdoor Wall Room. The markers thus record the furthest point reached by the mercury in each arm of the tube, and thereby the highest and lowest temperatures since the last reset. The arms of the U-shaped tube terminate in sealed glass bulbs. rises, the alcohol expands and pushes the mercury up the maximum column. The original Six's thermometer design contains mercury, which has been banned for most uses in the European Union[5] and some other parts of the world. It is also commonly known as a maximum–minimum, minimum–maximum, maxima–minima or minima–maxima thermometer, of which it is the earliest practical design. However, there are still many cooperative weather stations using “mercury-in-glass” thermometers. Temperature Range: -20 to 50°C&F Accuracy: +/-1°C IP Rating: IP 65 Battery: 1 x AAA (Supplied) Product Dimensions: 203 x 100 x 30mm This a very popular and reliable thermometer for monitoring maximum and minimum temperatures. The Six's thermometer was invented by James Six in the UK in 1780. The bend at the bottom of Positive: 52.941176470588 % Tutorvista.com has created a video animation to describe the working of the different types of Thermomenters. 1890 - … It is used to record the extremes of temperature at a location, for instance in meteorology and horticulture. How is a six’s thermometer useful in a green house? A U-shaped thermometer, designed by J. W. Six, with a bulb that contains creosote. Before a maximum or minimum reading can be taken, both markers must be returned to the top of the mercury, usually by hand using a small magnet to slide them along the tube. This is unlike a normal mercury thermometer, in which the expansion and contraction of mercury itself indicates temperature. There are bulbs at the top of each arm of the tube, one above each indicator. A maximum-minimum thermometer works by registering the maximum and minimum temperatures over a certain time period by using two scales set in liquid mercury. 2. The bend at the bottom of the thermometer contains mercury which moves up or down based on the expansion and contraction of alcohol. Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day. The thermometer indicates the current temperature, and the highest and lowest temperatures since last reset. Generally speaking a minimum temperature occurs during the night and a maximum during the day. GLOBE® 2005 Maximum, Minimum, and Current Temperature Protocol - 3 Atmosphere L earning A ctivities A ppendix W elcome Intr oduction Pr otocols Teacher Support Maximum/Minimum Thermometer There are two instruments available to take daily measurements of maximum and minimum temperature. Copyright Notice © 2020 Greycells18 Media Limited and its licensors. ), If the temperature rises, the maximum scale marker will be pushed. Date: 1910-1930. This is pushed around by the thermal expansion and contraction of the alcohol in the first bulb as it responds to the external temperature. JAMES SIX invented the Maximum and Minimum thermometer in 1782. Generally speaking a minimumtemperature occurs during the night and a maximum during the day. expansion and contraction of alcohol. [2], The thermometer shows a reading at the top of the mercury section on both the maximum and minimum scales; this shows the current temperature and should be the same on both scales. Go to Activity It is used to record extreme temperatures at a location as in meteorology, horticulture etc. temperature falls, the alcohol contracts and pulls the mercury up in the the thermometer contains mercury which moves up or down based on the with the help of a diagram. Six's maximum and the minimum thermometer is used for measuring the day's maximum and minimum temperature. These are the maximum and minimum temperatures and the current temperature. minimum column resulting in a fall of mercury in the maximum column. Verify your number to create your account, Sign up with different email address/mobile number, NEWSLETTER : Get latest updates in your inbox, Need assistance? Sixs maximum and minimum thermometer is a popular thermometeramong gardeners for use in greenhouses. The highest number will be the maximum, the lowest the minimum, and the current temperature will be somewhere in between. What does a max min thermometer do? One side registers the maximum temperature and the other side records the minimum temperature. Exceed the values already encountered thermometer indicates the current temperature will be somewhere in between side records the temperature..., and the highest number will be pushed responds to the external temperature already encountered temperature occurs during day... 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