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 Soil Thermometer, 36" L x 0.25" Dia; 0-200F/ -15-90C
Our Process Grade bimetal thermometers offer a 3" and 5" dial sizeand are ideal for most rugged industrial temperature measurementapplications. The hermetically-sealed case offers protection fromweather and dust, and is guaranteed against fogging up. An inert gelis used to minimize pointer oscillation. These thermometers are guaranteed for seven years.
Andwin Scientific Dry Block/Incubator Thermometers, Thermometer, Swell, 0-80 degrees celsius
Individually serialized and designed for use in all standard heating blocks and water baths. Contains red organic liquid against white back glass. Thermometers can measure temperature of varying ranges depending on model.
Ace Glass, Inc. 76mm immersion non-merc thermometer 10/30, -10 to 250c
76mm immersion non-merc thermometer 10/30, -10 to 250c
Thermco Products Inc Precision Non-Hg, Taper Joint thermometer, Spirit, -10 deg./250 deg.C, 1.0C div, 25mm imm, 325mm, 10/30 taper
Manufactured with a 10/30 glass standard taper joint to fit in 10/30 joint of flasks and other laboratory glassware. Accurate to N.I.S.T. tolerances. Individually serialized. Thermometer may be Safety-Coated with TFE. Filled with a safe red spirit filling for safety purposes.
Ptc Instruments THERMOMETER, SURFACE, 50-750F
Designed for applications such as: hot plates; griddles; die-cast dies; foundry core boxes; annealing ovens; weld preheats; motors, generators, and engines; bearings; boilers, tanks ect. •Accuracy of ±2% of Full Scale Range •NIST/A2LA ISO 17025 3 Point Certification Available •Every Unit Individually Calibrated •Time constant from 0.06 to 1 minute (depending on the range) •Diameter 2 in. (5.1 cm). •Height ½ " (1.3 cm)
Thermco Products Inc -20/110C RED SPIRIT SAFCOTE
-20/110C Partial Red Spirit, 305mm, 1 degree divisions, Safety coated
Cole-Parmer Digi-Sense Ultra Low Liquid-In-Glass Thermometer; -100 to 50C, Total Immersion
These thermometers are inexpensive and safe for use in laboratories, universities, food/beverage, environmental, wastewater, petrochemical, pharmaceutical and many other general-purpose applications. Choose from partial immersion or total immersion thermometers. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include a ring top and a statement of accuracy supplied by manufacturer.
Thermco Products Inc General lab Non-Hg thermometer, Spirit, -20 deg./150 deg.C & 0 deg./300 deg.F, 76mm imm
Spirit filled double scale thermometer, white back tubing, with toughened bulbs. Suspension ring for hanging, vertical numbering. Individual serial numbered. Packed in non-roll square tubing. Permanent markings.
Cole-Parmer Digi-Sense Incubator Verification Thermometer; 15 to 50C, PFA Coated
Accurately monitor temperatures in freezers, refrigerators, incubators, ovens, and other environments where stability is required. These thermometers are supplied in a media-filled unbreakable plastic bottle and can be removed from the bottle for recalibration. Use the magnetic attachment with pressure-sensitive backing to attach the bottle to a metal wall or door. Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include an statement of accuracy and a triangular-style antiroll fitting.
Thermco Products Inc Special application Non-Hg, 0 deg./110 deg.C, 0.5C div, 35mm imm, 225mm
Precision spirit filled thermometer PTFE coated for safety to contain the glass and liquid if broken. The ACC647S thermometer was designed to be used in block heater (dry baths) with it's 35mm immersion. Accurate to N.I.S.T. tolerances. Eligible for N.I.S.T. certification. Also used in shallow water baths
Ptc Instruments 10° to 400°C Magnetic Surface Thermometer 314C
10° to 400°C Magnetic Surface Thermometer with, Aluminum Dial and 2 Magnet Base.
Certifications include; as received and as returned data, a statement of uncertainty, laboratory conditions, and information on the primary standards.
Thermco Products Inc Accu-Safe Non-Mercury Laboratory Thermometers Fractional Degree
Range: -1 to 51°C, Immersion: 76mm, and Length: 400mm.