
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

Fisherbrand™ PFA Safety Coated Liquid-In-Glass Partial Immersion Thermometers
In the event of breakage, the PFA fluoropolymer safety coating keeps the liquid and glass encapsulated.

Thermometer Fill | Organic |
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Immersion Type | Partial Immersion |
Material | Glass |
Certifications/Compliance | ISO/IEC 17025:2005, A2LA, NIST |
For Use With (Application) | Chemical laboratories, universities, scientific institutions, food and beverage processing, petrochemical laboratories, pharmaceutical industry, medical industry, manufacturers, dairies, breweries and distilleries |
Product Type | Spirit Thermometer |
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Thermometer Fill | Red Spirit |
Material | Glass |
Grade | Student |
Length (English) Overall | 12 in. |
Length (Metric) Overall | 305 mm |
Fisherbrand™ Enviro-Safe™ Liquid-In Glass Verification Thermometers with Compliance Report
Feature a PFA-fluoropolymer safety coating and Enviro-Safe EnviroKleen™ environmentally friendly fill.

Includes | Certificate of Compliance and individual serial number |
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Accuracy | 0.5°C |
Thermometer Fill | Enviro-Safe™ Liquid |
Material | Glass |
Grade | Precision |
Subdivision | 0.5°C |
Certifications/Compliance | NIST |
Fisherbrand™ General Purpose Liquid-in-Glass Partial Immersion Thermometers, Economical Grade
With red organic liquid with white back glass.

Thermometer Fill | Red Organic Liquid |
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Immersion Type | Partial Immersion |
Material | Glass |
Grade | Economical |
Length (English) Overall | 11.8 in. |
For Use With (Application) | Chemical laboratories, universities, scientific institutions, food and beverage processing, petrochemical laboratories, pharmaceutical industry, medical industry, manufacturers, dairies, breweries and distilleries |
Immersion Length | 76 mm |
Length (Metric) Overall | 300 mm |
Fisherbrand™ Durac™ Refrigerator/Freezer Thermometers
Dual scale thermometer features steel case and red organic liquid.

Fisherbrand™ Enviro-Safe™ Easy-Read™ General Purpose Liquid-in-Glass Thermometers
Environmentally friendly liquid-in-glass thermometers.

Includes | 10/30 Ground joint with Celsius scale |
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Thermometer Fill | Red Organic Liquid |
Material | Glass |
Subdivision | 1° |
Min. Temperature (Metric) | -10°C |
H-B Instrument™ High-Precision Enviro-Safe™ FRIO-Temp™ Liquid-in-Glass Verification Thermometers
Greener Choice
Offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
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Offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
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To verify sample temperatures in freezers, refrigerators, incubators and ovens with traceability to NIST, DAkkS/PTB

Includes | Multilanguage instructions, statement of accuracy, PFA Fluoropolymer coating |
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Bottle Size | 60 mL |
Bottle Fill | Liquid |
Subdivision | 0.1°C |
Certifications/Compliance | ISO/IEC 17025:2005, NIST, DAkkS/PTB |
H-B Instrument™ Durac™ Plus™ Calibrated Partial Immersion Thermometers

For precise measurements featuring an individual serial number with a Calibration Report

Thermometer Fill | Organic |
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Immersion Type | Partial Immersion |
Material | Glass |
Certifications/Compliance | ISO/IEC 17025:2005, A2LA, NIST |
For Use With (Application) | Chemical laboratories, universities, scientific institutions, food and beverage processing, petrochemical laboratories, pharmaceutical industry, medical industry, manufacturers, dairies, breweries and distilleries |
Immersion Length | 76 mm |
H-B Instrument™ Durac™ Plus™ Precision Verification Thermometers
To verify sample temperatures in freezers, refrigerators, incubators and ovens.

Includes | Multilanguage instructions, statement of accuracy indicating accuracy traceable to NIST |
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Product Type | Precision Verification Thermometer |
Thermometer Fill | Blue Organic Liquid |
Bottle Fill | Glass Beads |
Certifications/Compliance | ISO/IEC 17025:2005, A2LA, NIST, DAkkS |
H-B Instrument™ SP Scienceware™ Durac™ Plus™ ASTM-Like Total Immersion Laboratory Thermometers
Designed for use in quality control laboratories or when mercury filled thermometers cannot be used, but ASTM standards are still needed. H-B Instrument - SP Scienceware™ Durac™ Plus™ ASTM-Like Total Immersion Laboratory Thermometers are safer to use than their mercury filled counterparts.
Thermometer Fill | Blue Organic Liquid |
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Material | Glass |
Certifications/Compliance | ASTM, ISO 9000 |
For Use With (Application) | Quality control laboratories or where ISO 9000 standards are in place |
Thermco™ Precision Lig Mercury Thermometer, Total Immersion
Thermco™ Precision LIG Mercury Thermometer, Certified is individually serialized and permanently marked.
Accuracy | ±0.3°C |
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Product Type | LIG |
Thermometer Fill | Mercury |
Certifications/Compliance | No |
Immersion Length | Total |
H-B Instrument™ Durac™ Plus™ Individually Calibrated ASTM Liquid-In-Glass Thermometers, Organic Liquid Fill
Use these mercury-free, calibrated thermometers in quality control laboratories. The Durac™ Plus™ ASTM Liquid-In-Glass Thermometer conforms to ASTM standards for methods specified in the order table.
Length (Metric) | 405 mm |
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Product Type | ASTM Thermometer |
Thermometer Fill | Blue Organic Liquid |
Fisherbrand™ Calibrated Dry Block Thermometers
Individually calibrated thermometers feature blue organic liquid fill against lead-free white back glass.

Includes | Calibration report stating corrections to one-tenth of the smallest division and individual serial number |
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Accuracy | 0.5°C |
Thermometer Fill | Organic |
Immersion Type | Partial Immersion |
Material | Glass |
Subdivision | 0.5° |
Length (English) Overall | 4.9 in. |
Certifications/Compliance | NIST |
For Use With (Application) | All standard heating blocks and water baths |
Immersion Length | 35 mm |
Length (Metric) Overall | 125 mm |
Thermometer Fill | Red Spirit |
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Grade | Student |
Length (English) Overall | 12 in. |
Length (Metric) Overall | 305 mm |