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).
VEE GEE Glass Thermometer
The serialized glass thermometer is a precise instrument suitable for various general-purpose applications in laboratories, universities, food and beverage, environmental, wastewater, and other settings
VEE GEE Thermometer, Encapsulated in FEP
The encapsulated glass thermometer is designed to safeguard against broken glass and liquid. It contains a biodegradable Safety Blue fill, offering mercury-like properties minus the associated risks of contamination and hazards.
VEE GEE Thermometer, Encapsulated in FEP with Armor
The armored encapsulated glass thermometer is protected in the event of breakage, the FEP coating contains the broken glass and liquid fill, preventing injury or contamination. The armor protects the thermometer from rough handling and shock during use and encapsulation protects you.
VEE GEE Thermometer, Immersion with Armor
The serialized armored glass thermometer's armor protects the thermometer from rough handling and shock during use.
Fisherbrand™ Traceable™ Refrigerator/Freezer Ultra™ Thermometer
Monitor two different areas at the same time with Traceable™ Refrigerator/Freezer Ultra™ Thermometer.
Fisherbrand™ Traceable™ Vaccine Refrigerator/Freezer Thermometer
Monitors temperature of vaccine in freezers, water baths, heating blocks, incubators, and refrigerators with enclosed temperature-buffered sensor.
TFA Dostmann™ Analog Glass Thermometer
Scale with temperature markings. High accuracy.
Brannan™ Styrene Wall Thermometer
Brannan™ Styrene Wall Thermometer is large with bold black print and suitable for indoor and outdoor use.
Brannan™ Initial™ Green Spirit-filled Partial Immersion Thermometer
Provides vibrant, easy to read measurements. Brannan™ Initial™ Green Spirit-filled Partial Immersion Thermometer is designed with moulded non-roll glass device to helps prevent breakage. Includes integral bulb with reinforced stirring tip.
Brannan™ Classic Stainless Steel Dial Oven Thermometer
Brannan Classic Stainless Steel Dial Oven Thermometer features a black temperature scale and red pointer for clear reading
Brannan™ Lab Tripod Thermometer
General purpose laboratory thermometer without calibration certificate.
Brannan™ Partial Immersion Spirit-Filled Thermometers
Filled with a brightly colored, mercury-free spirit. Brannan™ Partial Immersion Spirit Filled Thermometers use specially selected filling materials covering temperatures down to -200°C and feature a non-roll cap with suspension ring.
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™ Digital Fridge Thermometer with Alarm
Sounds an alarm sounds and flashes LED lights for 5 seconds every minute when the temperature goes outside the safety zone. Brannan™ Digital Fridge Thermometer with Alarm includes 1m probe cable and suction pad.
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