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 ASTM Like Liquid-In-Glass Thermometer; 15F / Low Softening Point, Total Immersion, 32 to 180F, Organic Liquid Fill
These thermometers are precision manufactured to conform to ASTM E-1 specifications except for not being mercury filled. Designed for use in quality control laboratories or when mercury filled thermometers can not be used but where ASTM standards are still needed. ASTM established thermometer standards suited for special applications, and assigned an ASTM number according to each specification. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered.
Alkali Scientific Bi-directional Liquid Transfer Cap System for 3L High Efficiency Erlenmeyer Flasks, White, TPE Tube (50cm 1/4" ID 3/8" OD), Vent Filter (0.22 μm Φ24mm), Sterile, 1/pk, 4/cs
Our 3L High Efficiency Erlenmeyer Flask comes equipped with a Bi-directional Transfer Cap with a TPE Tube (50cm 1/4" ID 3/8" OD) and a Vent Filter (0.22 μm – 24mm). This sterile flask is ideal for various laboratory applications. The Bi-directional Transfer Cap facilitates easy and efficient transfers, while the TPE Tube ensures a secure connection. The Vent Filter, with a pore size of 0.22 μm, provides reliable filtration. Each pack contains 1 flask, and there are 4 packs per case. This setup is designed to streamline your workflow and enhance productivity in sterile environments.
Med Vet International Dynarex Pre-Filled Saline Flush Syringe, 5mL, 480/Case
Dynarex Pre-Filled Saline Flush Syringes are convenient, integrated needle-free systems designed to safely and efficiently flush compatible intravenous administration sets. These sterile, disposable syringes come pre-filled to reduce the risk of cross-contamination and minimize syringe-generated blood reflux. Clearly marked with graduations for accurate dosing, the syringes feature an easy screw-tip cap to minimize the risk of microbial contamination. Dynarex Pre-Filled Saline Flush Syringes are high-quality integrated needle-free systems designed to effectively maintain the patency of indwelling intravenous access devices. These sterile Syringes come pre-filled for time-saving convenience, and to help reduce the risk of cross-contamination and syringe-generated blood reflux.