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 Calibrated Liquid-In-Glass Thermometer; -20 to 150C, 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.
Grainger Cls 2 Trnsfrmr 30VA Enclosed Foot
The Edwards Signaling 30VA Class 2 Transformer is a UL Listed Class 2 transformer that steps down 120VAC to 24VAC. It has a maximum load rating of 30VA and provides short circuit protection. This transformer can be used for doorbells, chimes, nurse call systems, security systems, fire alarm systems, and other low voltage control applications. The transformer has an all-steel construction with a scratch resistant powder coated finish, measures 5-1/4" H x 4-3/8" W x 3-3/8" D, and weighs 4 lbs. It comes with a 5 year warranty.
Research Products International Corp Thermometer, 2 Solid Probe Sensors
High accuracy dual channel thermometers feature 0.01° high resolution with accuracy of ± 0.30°C. Individual channels provide simultaneous monitoring of temperatures in separate locations. Display exact time and date when a min/max reading occurred and alarm sounded. Min/Max temperatures are programmable in 0.1°C increments over entire range of -50° up to +70°C. Temperature buffered solution probes contain a non-hazardous glycol mixture that eliminates rapid temperature changes when opening refrigerator or freezer door.
Available with one miniature size sensor that is chemical resistance and waterproof for use in water baths, incubators or dry block heaters. Supplied with Traceable Calibration Certificate (NIST), stand, mounting strips and battery.
Essendant Smead Redrope Drop Front File Pockets with 2/5-Cut Guide Height Tabs, 3.5" Expansion, Legal Size, Redrope, 25/Box
Manage bulky records with these sturdy file pockets that are available in a variety of expansions The 6 5 high gussets are reinforced at top with rollover tear resistant material strip to make them virtually tear-proof Back of pocket lined with 11 pt manila stock for added strength and easy identification of subject heading Bottom and sides fully enclosed Made of sturdy redrope stock 2/5-Cut Guide Height TabsRight position Pocket/Wallet Type- Files/Papers Size- Legal Overall Expansion- 3 5 Color(s)- Redrope
Sigma Aldrich Fine Chemicals Biosciences Easy-ReadR thermometer tem1EA
Easy-to-read thermometers with black printing on a bright yellow background. filled with contrasting black non-hazardous Enviro-Safe liquid. Calibrated with NIST DKD standards.
Thermco Products Inc -20/110C RED SPIRIT SAFCOTE
-20/110C Partial Red Spirit, 305mm, 1 degree divisions, Safety coated
Cole-Parmer Digi-Sense Dry Block/Incubator Liquid-In-Glass Thermometer; 20 to 100C, 76mm Immersion, Organic Liquid Fill
These thermometers are designed for use in specific applications. These Durac thermometers feature markings that are permanently printed on the glass, individually serialized, and red spirit liquid that has a dark scale contrasts against a white background. Some thermometers are PFA coated for added safety which may cause a slight change in accuracy up to 1 division. Dry block thermometers - designed for use in all standard heating blocks and water baths with most having arrows indicating critical temperatures.