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 Refrigerator Verification Thermometer; -5 to 15C
Accurately monitor temperatures in freezers, refrigerators, incubators, ovens, and other environments where stability is required. All thermometers are supplied in a glass bead filled unbreakable plastic bottle and can be removed from the bottle for recalibration. Use the magnetic attachment with pressure-sensitive backing to attach the bottle to a metal wall or door. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include an statement of accuracy and a triangular-style antiroll fitting.
Thermco Products Inc Block heater bottle thermometer, spirit, 50 deg./110 deg.C, 0.5C div, 165mm, 1ml mineral oil
NC0439143 DRYBLOCK THERM 50-110C
Thermco Products Inc BLUE SPIRIT THERM OS62C
ASTM S62C 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.
Thermco Products Inc NIST Traceable Thermometer, -1/201C x 0.5C Blue Spirit, Total Imm, 430mm long, Factory Certified @ 0, 25, 37, 44.5, 56, 105, 121, 180, 200C
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.
Icl Cal Lab Inc NIST Traceable, ISO/IEC 17025 accredited thermometers, -5 to 130 °C, -5 to 130 °C
Specifically designed to comply with CLIA and EPA specifications. Supplied with NIST Traceable, ISO/IEC 17025 accredited certificate of calibration. Precision mercury in glass or Non Mercury thermometers.Graduated in 0.5 ° Divisions. Please provide calibration interval on each order, 1 or 2 years
Cole-Parmer TRACE DIGI POCKET THERMOMETER
Traceable Digital Pocket Thermometer with Calibration; 1C accuracy
Cole-Parmer Digi-Sense Dry Block/Incubator Liquid-In-Glass Thermometer; 0 to 100C, 35mm Immersion, Organic Liquid Fill
These thermometers are designed for use in specific applications. These Durac thermometers feature markings that are permanently printed on the glass, individually serialized, and red spirit liquid that has a dark scale contrasts against a white background. Some thermometers are PFA coated for added safety which may cause a slight change in accuracy up to 1 division. Dry block thermometers - designed for use in all standard heating blocks and water baths with most having arrows indicating critical temperatures.
Cole-Parmer Taylor 497J Metal Dial Thermometer, 12", -60 to 120F, 30% to 80% RH
Giant, oversized face has bold, easy-to-read numerals. Made of metal for durability and is weather resistant. Thermometer easily mounts to walls or any other flat surface. Dual-scale thermometer reads in both C and F. Temperature scale has maximum contrast for ease of reading in low lighting conditions. Rectangle thermometers are 12" high and have a spirit filled glass tube.
Chemglass Life Sciences Thermometer, Non-Mercury, 10/18 Joint, 51mm Immersion, -10C to 250C
Thermometer, Non-Mercury, 10/18 Joint, 51mm Immersion, -10C to 250C. 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 10/18 inner ground joint. All ranges have 1° subdivisions. Immersion is measured from the bottom of the joint to the bottom of non-mercury bulb.