maximum and minimum thermometer pdf

Maximum and minimum thermometer pdf

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GPI key values

Digital thermometer with maximum and minimum function

maximum and minimum thermometer

Weather can be described using terms such as wet or fine, warm or cold, windy or calm, so why is there a need to measure the weather? For most people, a description of the weather is adequate but for many businesses more detailed and accurate measurements are required.

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GPI key values

A Six's thermometer functions by using alcohol to expand or contract the mercury inside to display both the highest and lowest temperatures of a given time period. There are bulbs at the top of each arm of the tube, one above each indicator. The bulb above the minimum indicator tube typically contains alcohol while the bulb atop the maximum indicator tube contains a vacuum.

Six's thermometers are an excellent way to record both the highest and lowest temperatures in a day without going outside and making note of the temperature repeatedly. Before each reading, the thermometer must be reset with iron indexes being moved back into position at each end of mercury section with the aid of a magnet. The minimum temperature is recorded from the left column of the tube while maximum temperature is recorded from the right column.

The key difference between regular thermometers and Six's thermometers, besides the ability of the latter to record maximum and minimum temperatures together, is that in regular mercury thermometers it is the expansion of mercury which records the temperature. However, in Six's thermometers, it is the expansion of alcohol or creosote that records the temperature variation while the mercury simply displays it.

Six's thermometer is popular among gardeners, and for use in greenhouses. It's purpose is to record the maximum and minimum temperatures reached since the thermometer was last read, typically around 24 hours. Generally speaking the minimum temperature occurs during the night and the maximum temperature occurs during the day. The thermometer consists of a fairly large cylindrical bulb A which originally contained alcohol but now oil of creosote is more common.

This is connected by a U shaped stem to a second bulb nearly full of the same liquid. The bend of the U contains mercury. Two scales are provided, one against each limb of the tube so that the temperature may be read against either of the mercury levels.

Resting on each of the mercury columns are small steel indexes with light springs to hold them in position in the stem. Expansion or contraction of the liquid in A causes a movement of the mercury thread. Consequently, one or other index is pushed by the mercury and left in the extremest position reached.

The index on the left indicates the minimum position reached and that on the right indicates the maximum position reached. After reading the maximum and minimum temperatures, a magnet is used to bring the springs back into contact with the mercury. Open navigation menu.

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Digital thermometer with maximum and minimum function

CO2 Meters. Data loggers. Pressure gauge. Pressure transmitter. Diaphragm seal.

A Six's thermometer functions by using alcohol to expand or contract the mercury inside to display both the highest and lowest temperatures of a given time period. There are bulbs at the top of each arm of the tube, one above each indicator. The bulb above the minimum indicator tube typically contains alcohol while the bulb atop the maximum indicator tube contains a vacuum. Six's thermometers are an excellent way to record both the highest and lowest temperatures in a day without going outside and making note of the temperature repeatedly. Before each reading, the thermometer must be reset with iron indexes being moved back into position at each end of mercury section with the aid of a magnet.


The temperature readings, as defined in the following paragraphs, are taken from the minimum-maximum thermometers. The readings consist of temperature.


maximum and minimum thermometer

A thermometer designed to record both the maximum and minimum temperatures that have occurred over a given time period. It usually consists of a graduated capillary tube at the base of which is a bulb containing ethanol. The capillary contains a thin thread of mercury with a steel index at each end.

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Copy embed code:. Automatically changes to Flash or non-Flash embed. WordPress Embed Customize Embed. URL: Copy. Presentation Description Maximum and Minimum thermometer is an instrument which is used to me. We have to know the highest and lowest temperature since last reset.

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