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Related Concept Videos

Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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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,...
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Temperature Measurement Sites01:14

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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...
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Bubble Sensors for Temperature Measurements through a Colorimetric Approach.

Carlo Trigona1, Sara Panebianco1, Rosaria Galvagno2

  • 1Department of Electrical Electronic and Computer Engineering, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy.

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Summary

This study presents a novel bubble sensor using thermochromic paint for passive temperature measurement in hard-to-reach areas. The red bubble with blue paint combination offers quantifiable color changes for effective temperature monitoring.

Keywords:
color characterizationspectral reflectance factorspectroradiometrytemperature sensorthermochromic paint

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Area of Science:

  • Materials Science: Development of novel sensing materials.
  • Instrumentation: Design of passive temperature sensors.

Background:

  • Accurate temperature monitoring is crucial across various scientific and industrial fields.
  • Existing methods often require external power sources or are unsuitable for confined spaces.
  • Thermochromic materials offer a passive, visual temperature indication.

Purpose of the Study:

  • To develop and characterize a novel passive temperature sensor utilizing thermochromic paint-coated bubbles.
  • To evaluate the sensor's performance for temperature measurements in challenging environments.
  • To analyze the colorimetric properties of thermochromic paint and plastic resin combinations.

Main Methods:

  • Thermochromic paint characterization using spectroradiometric measurements.
  • Color analysis of plastic resin bubbles with varying thermochromic paint coatings.
  • Assessment of sensor response to temperature variations by measuring chromatic coordinates.

Main Results:

  • The combination of a red bubble with blue thermochromic paint demonstrated quantifiable color variations.
  • This specific combination showed suitability for temperature sensing applications, unlike the blue bubble/red paint alternative.
  • Experimental data confirmed distinct changes in chromatic coordinates (C* and h) at the paint's transition temperature (35 °C).

Conclusions:

  • The thermochromic bubble sensor presents a viable, power-free solution for temperature monitoring.
  • The red bubble/blue paint configuration is recommended for its superior performance.
  • Further research is needed to explore reproducibility and a wider range of material combinations.