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).
H-B Instrument™ FRIO-Temp™ Calibrated Electronic Verification Lollipop Stem Thermometers
For use in digital verification of sample temperatures in general applications. H-B Instrument™ FRIO-Temp™ Calibrated Electronic Verification Lollipop Stem Thermometers render accurate temperature reading without sample contamination.
H-B Instrument™ Durac™ Bi-Metallic Surface Temperature Thermometers: Stainless Steel
With 2.5% or 2.5° accuracy — ideal for measuring temperatures in pipes, griddles and hot plates.. H-B Instrument Durac Bi-Metallic Stainless Steel Surface Temperature Thermometers are designed for boilers, process lines, motors, pipes, griddles and hot plates or anywhere a surface temperature needs to be measured. These bi-metal thermometers provide an inexpensive temperature measurement solution and quick readings.
H-B Instrument™ FRIO-Temp™ Calibrated Electronic Verification Lollipop Stem Thermometers for Incubator
For use in digital verification of sample temperatures inside incubators. H-B Instrument™ FRIO-Temp™ Calibrated Electronic Verification Lollipop Stem Thermometers for Incubator render accurate temperature reading without sample contamination.
H-B Frio-Temp SP Scienceware™ Calibrated Electronic Verification Thermometers, Calibrated for Incubators
Digital thermometers verify sample temperatures in freezers, refrigerators, incubators and ovens. Available calibrated for specific applications and equipment.
H-B Instrument™ FRIO-Temp™ Electronic Verification Lollipop Stem Thermometers for Ambient Rooms
For use in digital verification of sample temperatures in ambient calibration. H-B Instrument™ FRIO-Temp™ Electronic Verification Lollipop Stem Thermometers for Ambient Rooms render accurate temperature reading without sample contamination.
H-B Instrument™ H-B™ Enviro-Safe™ Individually Calibrated Environmentally Friendly Precision Liquid-In-Glass Thermometer
Individual calibration report as needed for many standard operating procedures
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 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.
H-B Instrument™ Durac™ Galileo Thermometers
Thermometers with colorful spheres which rise and fall to indicate temperature
H-B Instrument™ Double-Safe™ PFA Safety Coated, Liquid-In-Glass Thermometers: Total Immersion
Protect your workplace and ensure a safe environment
H-B Instrument™ Durac™ Angled Thermometer
Designed for use in all heating blocks
H-B Instrument™ Durac™ Wall Thermometers
Strong and durable
H-B Instrument™ Enviro-Safe™ Calibrated Dry Block Incubator Thermometer
Environmentally friendly, liquid-in-glass thermometers
H-B Instrument™ Durac™ Maximum-Registering Autoclavable Bimetal Thermometers
Indicate the highest temperature achieved and hold that measurement until manually reset
H-B Frio-Temp SP Scienceware™ Calibrated Electronic Verification Thermometers, Calibrated for Refrigerators
Digital thermometers verify sample temperatures in freezers, refrigerators, incubators and ovens. Available calibrated for specific applications and equipment.