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™ Easy-Read™ General Purpose Liquid-In-Glass Thermometers: Total Immersion
Easy-to-read total immersion thermometers
Thermometer Fill | Enviro-Safe™ Liquid |
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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. |
H-B Instrument™ Frio-Temp™ Digital Verification Thermometers
Calibrated specicifally to verify samples in temperatures in freezers, refrigerators, incubators and ovens.
Height (Metric) | 18 mm |
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Width (English) | 2 in. |
Length (Metric) Cable | 1 m |
Bottle Size | 30 mL |
Bottle Fill | Glass Beads |
Length (English) Probe | 4.1 in. |
Width (Metric) | 51 mm |
Battery Type | AAA |
Length (Metric) Probe | 105 mm |
Includes | Alarm, Timer |
Accuracy | ±1°C from -20/130°C; ±2°C from -50/-21°C and 131/200°C; otherwise ±4°C |
Temperature Range (English) | -50/300°C |
Length (English) Cable | 3.5 ft. |
Temperature Range (Metric) | -58°F to +572°F |
Resolution | 0.1°C/°F; 1 second |
Height (English) | 0.7 in. |
H-B Instrument™ Durac™ Bi-Metallic Thermometer
With 2.5% or 2° accuracy—ideal for measuring temperatures in pipes, griddles and hot plates.
Includes | Stainless Steel probe, multilanguage statement of test and calibration, beaker clip with built in adjustment tool |
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Accuracy | 0.01 |
Display Dimensions | 1.7 in. (44 mm) |
Lens Material | Polycarbonate |
Dial Size (Metric) | 44 mm |
Material | Metal |
Dial Size (English) | 1.75 in. |
For Use With (Application) | Petrochemical, oil and gas, waste water, pharmaceutical, compost, food and beverage storage and processing, asphalt, mining, utilities, automotive, marine, photographic |
Immersion Length | 50 mm in liquids or 100 mm in gas |
H-B Instrument™ Easy-Read™ General Purpose Liquid-In-Glass Thermometers: Partial Immersion
Easy-to-read partial immersion thermometers
Thermometer Fill | Enviro-Safe™ Liquid |
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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. |
H-B Instrument™ FRIO-Temp™ Precision 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™ and DAkkS.
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™ 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™ 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 |
H-B Instrument™ Easy-Read™ Individually Calibrated Liquid-In-Glass Thermometers: Partial Immersion
Individual Calibration Report as needed for many standard operating procedures
Thermometer Fill | Enviro-Safe™ Liquid |
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Immersion Type | Partial Immersion |
Material | Glass |
Grade | Precision |
Certifications/Compliance | Each thermometer includes an individualized Thermometer Calibration Report stating corrections to one-tenth of the smallest division, unique report number and NIST standards used for the calibration. Individually serialized and made in the USA |
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. |
Immersion Length | 76 mm |
H-B Instrument™ Enviro-Safe™ Dry Block/Incubator Thermometers
EnviroKleen™-certified environmentally friendly with 100% non-toxic, non-hazardous, biodegradable liquid fill. H-B Instrument™ Enviro-Safe™ Dry Block/Incubator Thermometers are 175mm (6.9 in.) liquid-in-glass, 35mm immersion thermometers.
Accuracy | 0.5°C |
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Thermometer Fill | Enviro-Safe™ Liquid |
Material | Glass |
Subdivision | 0.5°C |
Length (English) Overall | 6.9 in. |
Certifications/Compliance | ISO/IEC 17025:2005, A2LA, NIST |
Temperature Range (Metric) | 24°C to 57°C |
Max. Temperature (Metric) | 57°C |
Min. Temperature (Metric) | 24°C |
Immersion Length | 35 mm |
Length (Metric) Overall | 175 mm |
H-B Instrument™ Durac™ Plus™ Calibrated Total Immersion Thermometers
With accuracy of 1.5°C or better.
Immersion Type | Total Immersion |
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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 |
H-B Instrument™ Double-Safe™ PFA Safety Coated, Liquid-In-Glass Thermometers: Partial Immersion
Greener Choice
Offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More
Offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
Learn More
Protect your workplace and ensure a safe environment
Includes | Multilanguage instructions, statement of accuracy |
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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™ Durac™ Bi-Metallic Thermometers: 50mm Dial
With 2.5% or 2° accuracy—ideal for measuring temperatures in pipes, griddles and hot plates
Length (Metric) Probe | 200 mm |
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Includes | Stainless Steel probe, multilanguage Statement of Test and Calibration, beaker clip with built in adjustment tool |
Accuracy | 0.01 |
Display Dimensions | 50 mm (2 in.) |
Lens Material | Polycarbonate |
Dial Size (Metric) | 50 mm |
Material | Metal |
Length (English) Probe | 7.9 in. |
Length (English) Overall | 7.9 in. |
Dial Size (English) | 2 in. |
For Use With (Application) | Petrochemical, oil and gas, waste water, pharmaceutical, compost, food and beverage storage and processing, asphalt, mining, utilities, automotive, marine, photographic |
Immersion Length | 50 mm in liquids or 100 mm in gas |
Length (Metric) Overall | 200 mm |
H-B Instrument™ Durac™ Liquid-in-Glass Oven Thermometers
Total immersion type without featuring swell
Thermometer Fill | Organic |
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Immersion Type | Total Immersion |