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).
American Diagnostic Corporation AMERICAN DIAGNOSTIC CORPORATION
NC3927718 DIG THERM CUST BRANDING PK/12
Cole-Parmer Digi-Sense Armored Liquid-In-Glass Thermometer; 20 to 500F, 76mm Immersion, Organic Liquid Fill
Ideal for use in application where thermometers needs added protection from minor shocks. Nickel/plated brass armor shell protects these thermometers from accidental breakage during use and storage. The armor case has a screw cap with ring top and viewing window; the lower section that surrounds the bulb has small openings for circulation. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include statement of accuracy and a triangular-style antiroll fitting.
Cole-Parmer Pocket Liquid-In-Glass Thermometer; -5 to 50C, Window Plastic Case, Organic Liquid Fill
These thermometers are ideal for use in laboratory, biology, chemistry, university, photographic, food/beverage, petrochemical, automotive, wastewater and many other general purpose applications. The protective plastic case protects these thermometers from accidental breakage during use and storage. The section of the case that surrounds the bulb has small openings for circulation.
GA International Stain-Proof Xylene-Resistant Labels 0.75" x 0.75" / 19.1mm x 19.1mm Rectangle White From -80°C to +149°C (-112°F to +300°F)
Thermal-transfer printable labels designed for microscope slides. These highly glossy labels repel stains and do not acquire colors from histological stains, such as hematoxylin or eosin. The labels and printed information are xylene-resistant when used in combination with our XAR-class of solvent-resistant ribbons. The print will resist xylene, toluene, alcohol, MEK, and other solvents and chemicals without needing additional protection. Ideal for histology lab applications.
Med Vet International Thermometer With Tee Adapter, Hud1637, Each
Clear housing with "easy read" red liquid column
Tel Tru Manufacturing Company Inc BI-METAL DIAL THERMOMETER LT22
NC3859957 BI-METAL DIAL THERMOMETER LT22
THORLABS INC Thorlabs N-BK7 Bi-Convex Lens Kit, AR Coated 350-700 nm
This Thorlabs N-BK7 Bi-Convex Lens Kit features lenses designed with an anti-reflective (AR) coating effective from 350 to 700 nm. The kit includes 14 individual pieces, suitable for a variety of optical applications.
- Bi-convex lens type
- N-BK7 material
- 1 in. diameter
- AR coating: 350 to 700 nm
- Kit includes 14 pieces
Cole-Parmer Fluke Calibration 1529-R Thermometer, 4 Thermistor/RTD Inputs
Use this high-accuracy thermometer to read up to four different sensors simultaneously. Display up to eight user-selected data fields such as averages, standard deviations and spreads, probe type and serial number, T1-T2 functions, date, time and battery power levels. Save up to 10 screen configurations for easy recall. Line or battery powered, ideal for both benchtop and on-site readings. Push-button front panel brings up a simple menu that guides you through setup. Choose probe coefficients, sample intervals, communication settings, password protection, and more. RS-232 port allows data download to a computer or printer—order advanced software and printer below. What's included: battery, battery charger, basic software and cable Available for sale in the United States and Canada only.
Grainger Digital Food Service Thermometer 1.7 L
The Grainger Approved Digital Food Service Thermometer is a digital thermometer designed for commercial kitchen use. It features a stainless steel probe with a temperature range of -58 to 572°F (-50 to 300°C), and an accuracy of ±1.8°F/1°C. The large LCD display shows the temperature reading in Celsius or Fahrenheit. It has a food-safe ABS plastic body, and includes a pocket clip and probe cover. The thermometer is powered by a single LR44 button cell battery. It meets NSF standards for commercial food service.