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: 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™ Durac™ Plus™ Liquid-In-Glass Armored Thermometer
Features an open protective nickel plated brass armor
Includes | Multilanguage instructions, Statement of Traceability indicating accuracy |
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Thermometer Fill | Blue Organic Liquid |
Immersion Type | Partial Immersion |
Material | Glass |
Certifications/Compliance | ISO/IEC 17025:2005, A2LA, NIST, ANSI/SAMA Z236.1-1983 |
Immersion Length | 76 mm |
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™ 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™ Durac™ Plus™ ASTM-Like Partial Immersion Laboratory Thermometers
Safer than their mercury counterparts
Thermometer Fill | Blue Organic Liquid |
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Material | Glass |
Certifications/Compliance | ASTM |
For Use With (Application) | Quality control laboratories or where ISO 9000 standards are in place |
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 |
H-B Instrument™ Durac™ Bi-Metallic Thermometer: Range: 10° to 260°C (50° to 500°F), 64mm Dial
With 2.5% or 2° accuracy—ideal for measuring temperatures in pipes, griddles and hot plates
H-B Instrument™ Durac™ Bi-Metallic Oven Thermometer, Range: 10deg. to 260deg.C
Stainless-steel construction with plastic dial face
H-B Instrument™ Double-Safe™ PFA Safety Coated, Liquid-In-Glass Thermometers: Total Immersion
Protect your workplace and ensure a safe environment
Thermometer Fill | Enviro-Safe™ Liquid |
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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) | Chemical laboratories, universities, scientific institutions, food and beverage processing, petrochemical laboratories, pharmaceutical industry, medical industry, manufacturers, dairies, breweries and distilleries |
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™ Durac™ Liquid-in-Glass Oven Thermometers
Total immersion type without featuring swell
Thermometer Fill | Organic |
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Immersion Type | Total Immersion |
For Use With (Application) | Measuring refrigerator/freezer temperatures |
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H-B Instrument™ DURAC™ Bi-Metallic Min/Max Thermometer; -50/50°C (-58/122°F)
Maximum/Minimum thermometers display the current temperature and register the maximum and minimum temperatures attained since the last reset.
H-B Instrument™ Durac™ Galileo Thermometers
Thermometers with colorful spheres which rise and fall to indicate temperature
Includes | Colorful spheres |
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Accuracy | ±4°F |
Material | Glass |
Subdivision | 4° |
Temperature Range (Metric) | — |
H-B Frio-Temp SP Scienceware™ Calibrated Electronic Verification Thermometers, Calibrated for General Applications
Digital thermometers verify sample temperatures in freezers, refrigerators, incubators and ovens. Available calibrated for specific applications and equipment.
Includes | Multi-language instructions (English, French, German, Italian, Portuguese and Spanish) |
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Certifications/Compliance | Tested and calibrated in H-B's exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory (Cert No.2448.01), against equipment whose calibration is traceable to NIST. Individually serialized, CE marked. |
For Use With (Application) | Temperature Calibration and Verification |
Calibrated | General |
Resolution | 0.1°C/°F |