
Manual Thermometers
Mercury, non-mercury (liquid in glass), or bimetallic thermometers with analog displays, for general and application-specific use, with various temperature-range capacities and accuracies; may be traceable or certified to international standards.
In 1714, the mercury-in-glass thermometer was invented in Europe by physicist Daniel Gabriel Fahrenheit. Typically, the mercury is contained in a reservoir that opens to narrow glass tube. The distance that the mercury flows into the tube is dependent on the temperature to which the thermometer is subjected. The space above the mercury may be filled with air or an inert gas, or it may be a partial vacuum.
Thermometers are calibrated by exposing them to a known temperature and then marking the height of the mercury at that temperature. For example, one might calibrate to the freezing temperature of water (0°C or 32°F) by placing the thermometer in a mixture of ice and water. Then the thermometer could be submerged in boiling water to determine the point where the water changes from a liquid to a vapor (100°C or 212°F).
Mercury thermometers are still considered to be some of the most accurate temperature indicators. They can be used for a wide range of temperatures, from -37°C to 356°C (-35°F to 673°F). Modifications such as adding an inert gas above the mercury or replacing the glass with fused quartz can extend the upper temperature limit to as high as 800°C (1,470°F).
Mercury cannot be used below -38.83°C (-37.89°F), the temperature at which it becomes a solid. Moreover, nitrogen in the thermometer can flow down into the column and become trapped if the mercury solidifies, which makes the thermometer unusable. Use a thermometer that contains a mercury-thallium alloy for measuring lower meteorological temperatures – it will remain liquid to -61.1°C (-78.0°F).
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Filtered Search Results

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Shockwatch Div Mri Britevent Specimen Thermometer
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FEDERAL INDUSTRIES CORP CELL VET BLD TRANSP BOX 40 PL
NC2553194 CELL VET BLD TRANSP BOX 40 PL

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COLE PARMER 3P -20/110C THERM CAL 050 100C
NC2589539 -20/110C THERM CAL 050 100C

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THOMAS SCIENTIFIC THERMOMETER -20 TO 110C 76MM
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NC2171312 THERMOMETER -20 TO 110C 76MM

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Weber Scientific DIGITAL PASTEURIZATION THERMOM
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ANDWIN SCIENTIFIC GLASS ROD W/PTFE LIQ CORE 2X65
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Market Lab Bottle Thermometers, ML20101, 3ml
The MLI ML20101 Bottle Thermometer is a glass thermometer with a blue alcohol-filled column and white numbers for easy reading. It has a temperature range of -20 to 110°F/-28 to 43°C and is 8 inches long. This thermometer is designed for use in liquids and attaches to bottles, carboys, and tanks with a stainless steel clip. It can be fully submerged and is ideal for monitoring fermentation or controlling bath temperatures. The thermometer has 1° graduations for precise temperature measurement. It is made in the USA and is lead-free and non-toxic.

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