Manual Thermometers
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
H-B Instrument™ Enviro-Safe™ General Purpose Liquid-In-Glass Thermometers
Certified environmentally safe thermometers replace dangerous mercury.
H-B Instrument™ Easy-Read™ General Purpose Liquid-In-Glass Thermometers: Partial Immersion
Easy-to-read partial immersion thermometers.
Includes | Multilanguage instructions, statement of accuracy |
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Thermometer Fill | Enviro-Safe™ Liquid |
Material | Glass |
Certifications/Compliance | Traceable to NIST. Includes a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy and Traceability. |
For Use With (Application) | Ideal for use in chemical/petrochemical laboratories, universities, scientific institutions, food and beverage processing, pharmaceutical and medical industries, dairies, breweries and distilleries. |
Product Type | Distillation Thermometer |
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Material | Glass |
Min. Temperature (Metric) | 0°C |
H-B Instrument™ Double-Safe™ PFA Safety Coated, Liquid-In-Glass Thermometers: Partial Immersion
Greener Choice Product
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More About the Greener Choice Program
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More About the Greener Choice Program
Protect your workplace and ensure a safe environment
Includes | Multilanguage instructions, statement of accuracy |
---|---|
Thermometer Fill | Enviro-Safe™ Liquid |
Immersion Type | Partial Immersion |
Material | Glass |
Grade | Precision |
Certifications/Compliance | Traceable to NIST. Includes a multi-language (English, French, German, Italian, Portuguese, and Spanish) Statement of Accuracy and Traceability. |
For Use With (Application) | Ideal for use in chemical/petrochemical laboratories, universities, scientific institutions, food and beverage processing, pharmaceutical and medical industries, dairies, breweries and distilleries. |
H-B Instrument™ Double-Safe™ PFA Safety Coated, Liquid-In-Glass Thermometers
Greener Choice Product
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More About the Greener Choice Program
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More About the Greener Choice Program
Protect your workplace and ensure a safe environment.
Includes | Multilanguage instructions, statement of accuracy |
---|---|
Material | Glass |
For Use With (Application) | Ideal for use in chemical/petrochemical laboratories, universities, scientific institutions, food and beverage processing, pharmaceutical and medical industries, dairies, breweries and distilleries. |
Fisherbrand™ Lab Thermometer
A general purpose/stirring thermometer for a wide application of laboratory needs.
Product Type | Liquid Filled Thermometer |
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Thermometer Fill | Red Spirit |
For Use With (Application) | General use |
Fisherbrand™ Red Spirit Filled Total Immersion Thermometers
A general purpose/stirring thermometer for a wide application of laboratory needs. Fisherbrand™ Red Spirit Filled Total Immersion Thermometers have a white backing for readability.
Fisherbrand™ Red Spirit Filled Total Immersion Thermometers
A general purpose/stirring thermometer for a wide application of laboratory needs. Fisherbrand™ Red Spirit Filled Total Immersion Thermometers have a white backing for readability.
Product Type | Precision Thermometer |
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Immersion Type | Total Immersion |
Bottle Fill | Red Spirit |
For Use With (Application) | Government testing |
Calibrated | Yes |
Product Type | Thermometer |
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Immersion Type | Total Immersion |
Material | Glass |
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Brannan™ Horizontal Fridge Freezer Thermometer
Indicates recommended food storage temperature zones. Brannan™ Horizontal Fridge Freezer Thermometer sits on a shelf or hangs from a rack.
Material | Glass |
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Width (Metric) | 1.2 cm |
Brannan™ White Wall Thermometer
Takes measurements with miscible red spirit filling. Brannan™ White Wall Thermometer. Displays both °C and °F temperature scales and is suitable for indoor and outdoor use.
Brannan™ Forehead Clinical Thermometer
Brannan™ Forehead Clinical Thermometer is a safe, reusable thermometer strip that takes body temperature on contact.