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).
Cole-Parmer Digi-Sense Ultra Low Liquid-In-Glass Thermometer; -100 to 50C, Total Immersion
These thermometers are inexpensive and safe for use in laboratories, universities, food/beverage, environmental, wastewater, petrochemical, pharmaceutical and many other general-purpose applications. Choose from partial immersion or total immersion thermometers. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include a ring top and a statement of accuracy supplied by manufacturer.
Ace Glass, Inc. Thermometer, -20 to 110°C, 12" length, 76mm immersion
-20 to 110C enviro-safe economy thermometer with a 76mm immersion length. 12 inches long. Thermometer is filled with organic black liquid, and is made from lead-free glass. Does not contain mercury. Comes with a NIST traceable statement of accuracy.
Thermco Products Inc NIST compliant, factory certified glass Spirit thermometer, -100 deg./50 deg.C, 1.0C div, TOTAL imm, certified at -78 deg.C, -20 deg.C, 0 deg.C, 4 deg.C, 25 deg.C, 37 deg.C, 305mm
Thermco Certified Thermometers are used in temperature verification and calibration procedures. These instruments can be used to calibrate Liquid-In- Glass, RTD, Thermistors, Thermocouples, and Bi-Metal Thermometers. The certified thermometers are carefully inspected to insure they conform to exact specifications and are certified against NlST standards. Each thermometer is furnished with a document proving traceability and a felt-lined leatherette storage case.
Cole-Parmer Digi-Sense PFA Safety Coated Liquid-In-Glass Thermometer; 0 to 230F, 76mm Immersion, Organic Liquid Fill
These thermometers are ideal for use in laboratories, universities, food/beverage, environmental, wastewater, and many other general-purpose applications. In the event of breakage, the PTFE coating contains the broken liquid and glass, preventing contamination or injury. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered.
Chemglass Life Sciences Thermometer, Non-Mercury, 10/30 Joint, 100mm Immersion, -10°C to 250°C
Thermometer, Non-Mercury, 10/30 Joint, 100mm Immersion, -10¿C to 250¿C. Thermometer is mineral spirit filled to eliminate workplace and environmental hazards associated with mercury. Thermometer has a white back, a 6 to 7mm outer diameter, and a standard taper 10/30 inner ground joint. All ranges have 1¿ subdivisions. Immersion is measured from the bottom of the joint to the bottom of the mercury bulb.
Thermco Products Inc ASTM NM THERM FC -20-150C
ASTM S1C thermometer (Blue spirit) certified at the ASTM recommended temperatures and calibrated against N.I.S.T. standards. A N.I.S.T. traceable document is completed in the Thermco ISO17025/ILAC accedited laboratory.
USA Scientific Inc Direct Therm Cryo-Tags, 1/2"
Direct Thermal Cryo-Tags, yellow labels for 1.5-2.0 mL tubes, 1/2inch, 4000/roll. For direct thermal printers.
