Exporter of industrial thermometer mercury in steel thermometer, bimetal thermometer, hand held digital thermometer offered by bose panda instrument private limited, kolkata, west bengal. The alcohol thermometer is an alternative to the mercury thermometer. The mercuryinglass or mercury thermometer was invented by physicist daniel gabriel. They provide the same performance as a mercury thermometer, but use a blue liquid formula, which is nontoxic noncaustic, nonhazardous and biodegradable. Astm nonmercury liquidinglass thermometer alternatives. The change in internal pressure caused by the temperature variation is measured by a bourdon tube that is connected to the mercury by a capillary tube. Comparability of tympanic and oral mercury thermometers at. We are a predominant company engaged in manufacturing and supplying a wide range of temperature measuring instruments. The range of usefulness of the thermometer is set by the boiling point of the liquid used. The bimetal system consists of two metal strips bonded together that have different thermal expansion coefficients. Thermometer has a white back and a 6 to 7mm outer diameter, and is calibrated for 76mm 3 immersion. Astm nonmercury thermometers meet standard test method requirements for use in their referenced applications. Normally, temperatures are measured in celsius degree or fahrenheit degrees.
They are available in ranges from 38 deg c upto 600 deg c. The maximumminimum thermometer is read and set at 9. A wide variety of non mercury thermometer options are available to you, there are 362 suppliers who sells non mercury thermometer on, mainly located in asia. Containing a safe liquid alloy, our thermometer is completely nontoxic. Thermometers and the detection of fever feverish illness. The fairhaven health glass basal thermometer is a highly accurate laboratory certified alternative to hazardous mercury thermometers.
Medical thermometer 1 medical thermometer a medicalclinical thermometer showing the temperature of 38. The mercuryinglass or mercury thermometer was invented by physicist daniel gabriel fahrenheit in amsterdam 1714. The mercury thermometer, long a fixture in household medicine cabinets and industrial settings, is going the way of the horse and buggy. Temperature measuring instruments mercury in steel. One exception to this is the new fever thermometers containing gallium, indium and tin that also contain a silver bulb but are clearly marked mercuryfree.
Body temperature in children can be measured at a number of anatomical sites using a range of different types of thermometers. Under this range we provide mercury in steel type thermometer, bimetallic type thermometer and temperature indicator. Column separation is common in thermometers, particularly after transit or other situations producing excessive jarring. Infrared thermometers measure the radiant heat emitted from the tympanic membrane. It consists of a bulb containing mercury attached to a glass tube of narrow diameter. This relieves the magnetic strip and allows the metalised pins to fall down to the mercury column. Available in both rigid stem type and capillary type. Working thermometers calibration requirements bs 1900. And there is a scale showing the measured temperature. If scientific procedures cannot be performed with nonmercury thermometers, teflon coated mercury thermometers should be used. Thermometer is mineral spirit filled to eliminate workplace and environmental hazards associated with mercury. Sites used to measure temperature include the mouth, rectum and axilla. If the bulb is red, blue, purple, green or any other color, it.
These devices are made using best in standard raw material procured from most authentic vendors of the industry to make our products in par with international. Mercury in steel thermometer work on the principle of mercury expansion and contraction. It has a temperature sensitive bulb filled with liquid. Requirements are given for bulb and stem glasses, mercury, legibility and permanency of markings, dimensions, temperature scale ranges, and graduations, as well as for thermometer stability, ease of. Guidance on maintaining and calibrating nonmercury. Each thermometer is carefully inspected to conform to exact specifications, certified against. Bimetal thermometers are constructed of a metal sensing rod, which conducts the temperature to the thermal element, the thermal element and a scale. Of 472 sphygmomanometers in general use, only a handful had service.
The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Weather resistant outdoor sensor transmits up to 330 ft. The volume of mercury changes slightly with temperature. The types of thermometers available include mercuryinglass, electronic, chemical and infrared.
Us epa, office of pollution prevention and toxics, national program chemicals division subject. The liquidinglass thermometers have the same performance characteristics as astm mercury thermometers, but use safe blue liquid as an alternative to mercury. Like liquid mercury, the alcohol expands in volume as it gets warmer, causing the liquid to move up the thin tube inside the glass thermometer. The thermometers come with celsiusfahrenheit scale and fahrenheit scale only. The dangers of mercury thermometers what you should know about mercury thermometers the small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. Alcohol vs mercury thermometers thermometer is a device used for measuring temperature. Infrared pyrometer for the metal processing thermometer ctm1 m2. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. The hay contact thermometer features a sensor made of stainless steel, which can be. Astm nonmercury liquidinglass thermometer alternatives author. Replacing mercury thermometers astm standardization news. As of now, we are able to fulfill orders but we will keep you posted as the situation evolves.
Thermoscopes, thermometers, and the foundations of measurement pdf. When the welch allyn service tool is used to perform the calibration check the measured temperatures are evaluated by the software and the test results are captured in the service record which may be printed or archived for later reference. The mercuryinsteel thermometer is an extension of the principle of the mercuryinglass thermometer. General introduction of pipe thermometer bimetal thermometer is a temperaturemeasuring instrument in which the differential thermal expansion of thin, dissimilar metals, bonded together into a narrow strip and coiled into the shape of a helix or spiral, is used to actuate a pointer. Infrared pyrometers for universal measurements microepsilon. Ir temperature sensors of the thermometer ct series can be used in a wide variety. Gilson offers a variety of astm thermometers in mercury and nonmercury options. A separated column is one in which portions of the mercury or alcohol become separated from the main column. At a time period selected by the end user, the maxmin thermometer is reset by pushing the button between the two glass columns. Astm e667 982017 standard specification for mercuryin. The dangers of mercury thermometers chester county, pa. Directions for using mmg3 maximumminimum thermometer. To measure soil temperatures at greater depths of 50 to 100 cm, a steel pipe of the desired length is driven into the soil and a mercuryinglass thermometer is.
Vintage mercury thermometer plastic case violin,rare wallhanging thermometer,weather instrument,kitsch thermometer,ready to ship retrobackyardsales 5 out of. Industrial thermometer mercury in steel thermometer. Astm mercury thermometers from humboldt are fully compliant to astm e1, designed for specific testing and calibrated to your requirements. Mercuryfree, astmcompliant precision thermometers these thermometers provide a mercuryfree alternative to astm mercury thermometers. Place thermometer under the tongue for a minimum of 3 minutes. Metalbacked thermometers are nonmercury thermometers that are securely fastened onto an aluminum metal backing for added durability.
Grasp top of thermometer and shake with a snapping motion of the wrist. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Before storing, wipe clean with cotton ball or gauze square saturated with alcohol. A mercury thermometer can be easily identified by the presence of a silver bulb. Pdf accuracy and precision of digital thermometer in. In alcohol thermometers, column separations may appear as small bubbles. The teflon coating will help to reduce releases of mercury should a thermometer be broken. Nonmercury thermometer model 110ct3 ertcos spiritfilled certified thermometers are used to verify andor calibrate routinely used temperature measuring devices. A thermometer is a device that measures temperature or a temperature gradient.
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