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).
Alkali Scientific ASI™ 1" wide x 500" Color Coding Labeling Tape, 500 per Roll, 12/Rolls, Red
1" wide x 500" Color Labeling Tape Color coding tape is our another popular item, which is offered in an assortment of colors. This tape is beneficial in any laboratory, medical, or educational setting. From labeling test tubes to laboratory wraps, our brand color coding tape is an essential! Strong and Durable – oil, acid, and water resistant Withstands temperatures from -23º C to +121ºC (-10º F to +250ºF) Can be written on with pen, pencil, or permanent marker without smearing Available in 27 different colors and 1/2”, 3/4”, 1”, 1 1/2”, and 2” widths Labels Per Case: 500"/Roll, 12 Rolls/case
Enterprise Technology Solutions Business Source Thermal Paper Rolls, 4-3/8"x127', 50RL/CT, White
Thermal rolls are designed for route delivery and service-related receipts in portable printers. They are easy to use. Simply drop them in the portable printer's cradle and feed the paper. End-of-roll warning feature keeps you prepared for replacement time. The recyclable 3/8" core of the roll and the packaging are made of plastic. The 4-3/8" x 127' thermal roll is made with BPA-free and FSC Certified thermal paper.
USA Scientific Inc Direct Therm Cryo-Tags, 3/8"
Direct Thermal Cryo-Tags, red labels for 0.5-2.0 mL tubes, 3/8 in, 4000/roll. For direct thermal printers.
