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
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.
Alla France™ Precision Thermometers
Use these thermometers for a variety of applications. Alla France™ Precision Thermometers are manufactured using yellow Sodocalcique glass with a diameter of 6 to 7mm.
Length (Metric) | 305 mm |
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Product Type | Alcohol Thermometer |
Thermometer Fill | Red Liquid |
Immersion Type | Total Immersion |
Material | Glass |
Bottle Fill | Red Liquid |
For Use With (Application) | General use |
Fisherbrand™ -20 to +110 Lo Tox™ Laboratory Immersion Thermometer
Lo Tox™ organic filling is specially chosen to achieve wide temperature span and provide the lowest practical levels of hazard.
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.
Fisherbrand™ Traceable™ Refrigerator/Freezer Ultra™ Thermometer
Monitor two different areas at the same time with Traceable™ Refrigerator/Freezer Ultra™ Thermometer.
Bottle Size | 2.5 x 6.3 cm (1 x 2.5 in.) |
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Min. Temperature (English) | -58°F |
Max. Temperature (Metric) | 70°C |
For Use With (Application) | Monitoring temperatures in freezers, water baths, heating blocks, incubators, and refrigerators |
Accuracy | ±0.5°C (-30°C to +50°C), ±1°C otherwise |
For Use With (Equipment) | Monitoring Temperature in Freezer, Water Bath, Heating Block, Incubator and Refrigerator |
Product Type | Refrigerator/Freezer Ultra Thermometer |
Max. Temperature (English) | 158°F |
Temperature Range (English) | -58°F to +158°F |
Weight (English) | 4 oz. |
Temperature Range (Metric) | -50°C to +70°C |
Min. Temperature (Metric) | -50°C |
Calibrated | Yes |
Display | Digital |
Resolution | 0.1° |
Fisherbrand™ Traceable™ Vaccine Refrigerator/Freezer Thermometer
Monitors temperature of vaccine in freezers, water baths, heating blocks, incubators, and refrigerators with enclosed temperature-buffered sensor.
Height (Metric) | 19 mm |
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Length (Metric) Cable | 25.4 cm |
Length (Metric) | 70 mm |
Length (English) | 2.75 in. |
Min. Temperature (English) | -58°F |
Material | ABS Plastic |
Bottle Fill | Glycol |
Max. Temperature (Metric) | 70°C |
For Use With (Application) | Monitoring temperature in freezers, water baths, heating blocks, incubators and refrigerators |
Battery Type | AA Alkaline (1) |
Accuracy | ±1°C |
Max. Temperature (English) | 158°F |
Temperature Range (English) | -58°F to +158°F |
Length (English) Cable | 10 in. |
Weight (English) | 4 oz. |
Certifications/Compliance | ISO 17025, A2LA, NIST |
Temperature Range (Metric) | -50°C to +70°C |
Min. Temperature (Metric) | -50°C |
Display | Digital LCD |
Resolution | 1°C |
Height (English) | 0.75 in. |
Brannan™ LO-tox™ Lab Thermometer with 3-points Traceable Calibration
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
LO-tox™ lab thermometer complete with calibration certificate.
Material | Glass |
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Width (Metric) | 1.2 cm |
Brannan™ LO-tox™ Lab Thermometer with 3-points UKAS Calibration
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
LO-tox™ lab thermometer complete with calibration certificate.
Material | Glass |
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Width (Metric) | 1.2 cm |
Bel-Art™ H-B Frio-Temp Freezer Verification Thermometer with Individual Calibration Report
These mercury free, calibrated thermometers cover ranges from -90°C to +25°C and are calibrated at one or two specific temperatures.
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™ Precision Lab Thermometer with 3-points Traceable Calibration
High precision lab thermometer complete with calibration certificate.
Accuracy | ± 1.0°C |
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Material | Glass |
Certifications/Compliance | UK Traceable to National Standards ISO 9001 |
Width (Metric) | 1.2 cm |