Water Thermometer
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Taylor 9842 Commercial Waterproof Digital Thermometer
List Price: |
DescriptionFlat-Edged Dial Safe-T-Guard Thermometer with Antimicrobial Sleeve. Special additive in the sleeve material inhibits bacterial and fungal growth. Thermometer is waterproof for dependable use in kitchen or lab environments... |
Water Thermometer

How does a thermometer tell the temperature?
A thermometer measures temperature through a glass tube sealed with mercury that expands or contracts as the temperature rises or falls.
The tiny size of the bulb and micro-fine size of the tube help the mercury reach the temperature of what it is measuring very rapidly.
Bulb thermometers follow the simple principle that liquids change their volumes relative to their temperature. As temperatures rise, the mercury-filled bulb expands into the capillary tube. Its rate of expansion is calibrated on the glass scale. Two different scales can be found on thermometers--the Fahrenheit scale and the Celsius scale.
With the Fahrenheit scale, Daniel Fahrenheit decided that the freezing and boiling points of water would be separated by 180 degrees and he pegged freezing water at 32 degrees. So he made a thermometer, stuck it in freezing water, and marked the level of the mercury on the glass as 32 degrees. Then he stuck the same thermometer in boiling water and marked it 212 degrees. He then put 180 evenly spaced marks between those two points.In Celsius scale, Anders Celsius decided that the freezing and boiling points of water would be separated by 100 degrees and he made the freezing point of water at 100 degrees. (His scale was later inverted, so the boiling point of water became 100 degrees and the freezing point became 0 degrees.)
Bulb thermometers are most commonly found in two places--outside on our porches measuring the temperatures outside or under our tongues measuring our bodily temperatures.With the age the technology came the invention of other types of thermometers. Each different type of thermometer has their own distinctive means of measuring or controlling temperature. For instance, bimetallic strip thermometers are extremely effective for controlling temperatures. Although bulb thermometers are good for measuring temperature accurately, they are harder to maintain set temperatures.
While bulb thermometers measure our changing temperatures when we feel feverish, bimetallic strip thermometers help us bake our favorite cakes by maintaining a set temperature in ovens. The bimetallic strip thermometer, because it is made of metal, is good at maintaining the same temperature for a long period of time.Recent technology has created new ways to measure temperatures with electronics. The most common device is known as a thermoresistor (or thermistor). This sensor changes its resistance with changes in temperature. A computer or other electronic circuit measures the resistance and converts it to a temperature, either to display it or to make decisions about turning something on or off.
The heat is on…
The first attempt to make a standard temperature scale was done by Galen in AD 170. In his medical writings, Galen created a standard ""neutral"" temperature consisting of equal quantities of boiling water and ice. On each side of this ""neutral"" temperature were four degrees of heat and four degrees of cold.The earliest devices that were used to measure temperature were referred to as thermoscopes. A thermoscope was a glass bulb with a long tube extending downward into a container of colored water.
Did you know?
• In 1610 Galileo supposedly used wine instead of water in thermoscopes.
• In 1641, the first sealed thermometer that used liquid rather than air as the thermometric medium was invented for Ferdinand II, Grand Duke of Tuscany. His thermometer used a sealed alcohol-in-glass device, with 50 ""degree"" marks on its stem but no ""fixed point"" was used to zero the scale. These were referred to as ""spirit"" thermometers.
• Robert Hook, Curator of the Royal Society, created in 1664 the thermometer that eventually became the standard temperature-measuring instrument of Gresham College and was used by the Royal Society until 1709. (The first intelligible meteorological records used this scale).
• Mercury's unique characteristics are perfect for measuring temperatures for the following reasons: it has large and uniform expansion abilities, its silvery appearance allows for easy reading, its ability to remain a liquid over a wide range of temperatures.
About the Author
For More information about THERMOMETER visit our site www.coolquiz.com/trivia/explain/docs/thermometer.asp.
Holiday Tea Gifts: Water Thermometers
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Taylor 9842 Commercial Waterproof Digital Thermometer
List Price: |
DescriptionFlat-Edged Dial Safe-T-Guard Thermometer with Antimicrobial Sleeve. Special additive in the sleeve material inhibits bacterial and fungal growth. Thermometer is waterproof for dependable use in kitchen or lab environments... |
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Medelco 12-Cup Glass Stovetop Whistling Kettle
List Price: |
DescriptionThe Stovetop Whistling Tea Kettle can withstand high variations in temperature and is dishwasher safe%2E This whistling tea kettle has a 12 cup capacity with a heat resistant phenolic handle%2E Can be used on gas or electric stove tops%2E %28Includes whistling lid and metal trivet%29%2E |
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Taylor Classic Instant-Read Pocket Thermometer
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DescriptionThis thermometer instantly ascertains the temperature of foods, whether they're on the buffet line or being cooked. Its 1-inch dial, protected by a shatterproof plastic lens, displays temperatures from 0 to 220 degrees F... |
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HDE Temperature Gun Infrared Thermometer w/ Laser Sight
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DescriptionAvailable in red or yellow. |
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Black & Decker TLD100 Thermal Leak Detector
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DescriptionThe Black & Decker Thermal Leak Detector helps you increase the efficiency of your home's insulation by finding leaky areas that can lead to higher heating and cooling bills. You'll instantly identify problem areas around drafty windows and doors, and uncover hidden leaks and insulation "soft spots" around your home... |
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Kintrex IRT0421 Non-Contact Infrared Thermometer with Laser Targeting
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DescriptionThe KINTREX IRT0421 Non-Contact Infrared Thermometer with Laser is designed to measure temperatures accurately from a distance. Lightweight, compact, and easy to use, the IRT0421 can safely measure hot, hazardous, or hard-to-reach surfaces without damaging them... |
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Digital Stream Thermometer
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DescriptionDigital fishing thermometer lets you record water temperature quickly and more easily than ever in mere seconds. Thermometer has a simple jackknife style that clips onto belt for handy access. Records both high and low temp in C and F... |
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ADC Adtemp 427 Temple Touch Thermometer
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DescriptionAMERICAN DIAGNOSTIC CORP |
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Tetra Pond Thermometer (Catalog Category: Aquarium / Pond Supplies)
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DescriptionTetra Pond Thermometer. Feed your fish based on water temperature Color coded temperature scale shows when to feed and which food to feedRetrieval cord included. Size 75 long |
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Mobi 4-IN-1 Infrared Thermometer. MOBI ULTRA DIGITAL THERMOMETER EAR & FOREHEAD VOICE F OR C PERS. Clock, Water Resistant - For Ear, Forehead, Room |
DescriptionManufacturer/Supplier: Mobi Technologies, Inc Manufacturer Part Number: 70119 Brand Name: Mobi Product Name: 4-IN-1 Infrared Thermometer Product Type: Digital Thermometer Application/Usage: Ear, Forehead, Room Features: Clock, Water Resistant |
Tagged with: bath • bimetallic strip • boiling point of water • capillary tube • celsius scale • daniel fahrenheit • fahrenheit scale • freezing point of water • google • thermometer • types of thermometers • water • water thermometer 1593 • water thermometer digital • water thermometer for fishing • water thermometer inventor • water thermometers • work
Filed under: Aquariums
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