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 Ashcroft A935AF2 Adjustable Angle Glass Thermometer, 3.5" Stem; 0/120F
FEATURES
- Mercury free blue liquid in glass with magnifying lens for easy readability
- Molded Valox - V-shaped black case for ranges up to and including 300°F
- Die cast black aluminum V-shaped case for ranges above 300°F
- Glass front excludes dust and dirt
- White aluminum scale with bold black graduations and figures
- Accuracy is 0.1% of full scale
- Easy adjustment permits case and stem to be rotated 360°
- 9" scale is standard
- 1-1/4" - 18" NEF swivel nut
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
Grainger Dial Indicator 0 to 10mm 0-50-0
The Mitutoyo Back Plunger Dial Indicator is a precision measuring instrument used to accurately measure small distances and variations. It has a measuring range of 0-1" (0-25mm) with graduations of 0.001" (0.01mm). The indicator has a carbide-tipped contact point, jeweled movement, and satin chrome finish. It can be used on surfaces not perpendicular to the stem. This high quality dial indicator is ideal for use in inspection, machine shops, tool rooms and more.
Grainger Dial Indicator 0 to 1mm 0-100-0
The Mitutoyo Dial Indicator Flat Back 0-1" is a precision instrument for measuring small distances and variations. It has a 0-1" range with 0.001" graduations and a 1.6" dial face. The flat back design allows it to sit upright on surfaces. It measures in inch and metric units and features a friction thimble to lock the plunger. Made of hardened stainless steel with a satin chrome finish, it comes with a plastic case for protection. This durable dial indicator is ideal for inspection, manufacturing, and machining applications.
Enterprise Technology Solutions Awards Cert. Padded Cover
7510017146629 SKILCRAFT Awards Certificate Padded Cover Binder USMC Seal 9 12 x 11 62 Red/Gold
Ptc Instruments THERM SPOT CHECK 0-525C
Direct Contact Spot-Check Thermometer, Temp Range 10 to 525 deg.C, Accuracy +/-2% of full scale range, Dimensions: dia. 1-3/4 in. (4.4cm), Height 1/2 in. (13cm), Weight 1/2 oz.
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.