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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Thermometers and Temperature Scales01:22

Thermometers and Temperature Scales

Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Gas Thermometers and the Kelvin Scale01:22

Gas Thermometers and the Kelvin Scale

The definition of temperature in terms of molecular motion suggests that there should be a lowest possible temperature, where the average kinetic energy of molecules is zero (or the minimum allowed by quantum mechanics). Experiments confirm the existence of such a temperature, called absolute zero. An absolute temperature scale is one whose zero point is absolute zero. Such scales are convenient in science because several physical quantities, such as the volume of an ideal gas, are directly...

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Related Experiment Video

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Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
08:49

Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors

Published on: December 21, 2019

Sensitive temperature gradiometer for use at low temperatures.

E J Yarmchuk1, W I Glaberson

  • 1Department of Physics, Rutgers University, New Brunswick, NJ 08903, USA.

The Review of Scientific Instruments
|April 1, 1978
PubMed
Summary
This summary is machine-generated.

This study introduces a novel device for precise temperature gradient measurements, even amidst significant environmental temperature changes. It utilizes matched superconducting thin films and a SQUID magnetometer for high sensitivity.

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Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
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Area of Science:

  • Physics
  • Materials Science
  • Instrumentation

Background:

  • Accurate temperature gradient measurement is crucial in various scientific fields.
  • Ambient temperature fluctuations often interfere with sensitive measurements.
  • Existing methods may lack the required sensitivity or stability.

Purpose of the Study:

  • To describe a new device for highly sensitive temperature gradient measurements.
  • To demonstrate the device's capability in environments with substantial temperature variations.
  • To present a robust alternative to current measurement techniques.

Main Methods:

  • The device employs a bridge arrangement of two "matched" superconducting thin films.
  • A Superconducting Quantum Interference Device (SQUID) magnetometer serves as a sensitive null detector.
  • This configuration allows for precise detection of minute temperature differences.

Main Results:

  • The described device achieves very sensitive temperature gradient measurements.
  • It effectively mitigates the impact of large ambient temperature fluctuations.
  • The SQUID magnetometer provides excellent null detection for high precision.

Conclusions:

  • The developed device offers a significant advancement in temperature gradient sensing.
  • Its design is particularly advantageous for experiments requiring stable measurements under fluctuating conditions.
  • This technology has potential applications in diverse research areas demanding high-resolution thermometry.