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).
Ace Glass, Inc. Thermometer, -10 to 150°C, 8in length, 50mm immersion, accuracy ±1°C, ±1.5°C above 110°C
50mm immersion thermometer ranging from -10 to 150C. Thermometer is 8 in length and has an accuracy of 1C, 1.5C above 110C. In case of breakage this PFA coated thermometer will contain the organic black liquid filling. Thermometer comes with a NIST traceable statement of accuracy.
Thermco Products Inc ASTM 0S67C Approved Precision Thermometer, 95/155C x 0.2C, Blue Spirit, Total Imm, 40mm long
Thermco’s ASTM - Precision Non mercury Thermometers are calibrated against NlST standards and comes with a calibration document showing corrections to the nearest tenth of a scale division traceable to NIST. Certified at one temperatur point. The thermometer meets with all ASTM specifications and has an ice point scale enabling the user to validate and update the calibration document to insure accuracy.
Ace Glass, Inc. Thermometer, 0 to 230°F, 12in length, 76mm immersion, accuracy ±2°F
76mm immersion thermometer ranging from 0 to 230F. Thermometer is 12 in length and has an accuracy of 2F. In case of breakage this PFA coated thermometer will contain the organic black liquid filling. Thermometer comes with a NIST traceable statement of accuracy.
Enterprise Technology Solutions Integra Correction Fluid, Multipurpose, 20ml, White
Brush applicator corrects errors on surfaces, including typing, photocopies, pen ink, and faxes. Smooth application of correction fluid prevents spills and blotting. Does not require thinning. Environmentally safe and ozone friendly. Correction fluid contains mixing bead.
Petroleum Analyzer Corporation Thermometer, resistance, glass, HRB754, PT100
Thermometer, resistance, glass, HRB754, PT100
Cole-Parmer Digi-Sense Calibrated Liquid-In-Glass Thermometer; 30 to 124F, 76mm Immersion, Organic Liquid Fill
These thermometers are ideal for use in applications where a very precise accurate temperature measurement is required. Thermometers are individually calibrated to NIST standards at specific temperatures and supplied with an NIST report of calibration stating corrections to one-tenth the smallest division. Thermometers feature triangular anti-roll fitting, permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include an NIST-traceable statement of accuracy and a triangular-style antiroll fitting.
