What is the use of Beckmann thermometer?
A Beckmann thermometer is a device used to measure small differences of temperature, but not absolute temperature values. It was invented by Ernst Otto Beckmann (1853 – 1923), a German chemist, for his measurements of colligative properties in 1905.
Which is calculated by Beckmann thermometer?
Beckmann’s thermometer is used to determine the boiling point elevation (or) freezing point depression.
Who invented the first thermometer?
1612: Santorio Santorio – the first thermometer The Italian, Santorio Santorio (1561-1636) is generally credited with having applied a scale to an air thermoscope at least as early as 1612 and thus is thought to be the inventor of the thermometer as a temperature measuring device.
How do mercury thermometers work?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
What is thermometer used for?
A thermometer is a device used for measuring temperature.
Where are resistance thermometers used?
Due to their accuracy and robustness, they are extensively used as in-line thermometers in the food industry. Within a wide range of temperatures the resistance of metals increases linearly with temperature. The measuring element is usually made of platinum.
Who invented centigrade thermometer?
Anders Celsius, regarded as the founder of Swedish astronomy, is best remembered as the inventor of the Celsius temperature scale (often called the centigrade scale), in which 0°C is the freezing point of water and 100°C is the boiling point.
Are mercury thermometers legal?
Since 2001, 20 states have banned mercury “fever thermometers” for medical use, and regulations tighten every year. Many pharmacies now carry only sterile digital replacements or the less accurate ones with red glop in the bulb.
Are mercury thermometers safe?
The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Each thermometer contains about .
What is freezing point apparatus?
Determines the freezing point of aqueous engine coolant solutions by cooling a sample with continuous agitation until a plateau is observed in a time-temperature curve. Conforms to ASTM D1177 specifications.