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).
Shockwatch Div Mri ColdMark 5C / 41F
ColdMark temperature indicator monitors temperatures during shipping and storage, indicating if goods experience unacceptable conditions. These reliable temperature indicators provide visual evidence of exposure to unacceptably low temperature levels, allowing you to determine if product quality has been compromised. Temperature threshold: 5C/41F. Accuracy +/-1C. Shelf life 2 years. Single-use.
Med Vet International Thermometer Adapter, 22 Id X 22 Od mm, Standard, Hud1645, Each
Multipurpose port accepts most temperature probes and thermometers
Med Vet International Medline Thermometer, Hud1647, Each
Clear housing with "easy read" red liquid column Fahrenheit and Celsius scales from 50 degrees to 120 degrees and 10 degrees to 50 degrees respectively Probe fits most temperature ports and aerosol tee adaptors
Thomas Scientific Enviro-Safer Pocket Thermometer 0 to 220 F x 2 F Aluminum
Enviro-Safer Pocket Thermometer 0 to 220 F x 2 F Aluminum
Grainger Cls 2 Trnsfrmr 20VA Enclosed Foot
The Dayton Class 2 Transformer is a 20 VA, 120V primary to 4V secondary transformer made by Dayton Electric Manufacturing. It has an aluminum enclosure and features two 4V secondary windings that can be connected in parallel for a 4V output at higher current. The transformer can supply up to 5 amps continuously and has a maximum temperature rise of 115C. It can be mounted on a wall or DIN rail and complies with UL and CSA standards. The transformer measures 3.5" x 3" x 3.25" and weighs 2.5 lbs.
Hach Company Thermometer, Non-mercury, 30 to 50° C
Non-mercury thermometer, 30 - 50 degrees C Length: 250 mm Immersion: 76 mm Safety coated. Blue fill solution on white background provides excellent visibility.
