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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

2.3K
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...
2.3K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.2K
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,...
1.2K
Thermometers and Temperature Scales01:22

Thermometers and Temperature Scales

6.1K
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...
6.1K
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

142
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
142
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

702
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
702
Distance Corrections01:15

Distance Corrections

96
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
96

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Related Experiment Video

Updated: Sep 30, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

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Distributed temperature sensor combining centimeter resolution with hundreds of meters sensing range.

Julien Gasser, Daryl Warpelin, Félix Bussières

    Optics Express
    |March 18, 2022
    PubMed
    Summary

    This study introduces a Raman distributed temperature sensor using telecom fibers and advanced single-photon detectors. It achieves centimeter spatial resolution and high temperature accuracy, enabling new applications in complex thermal mapping.

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    Area of Science:

    • Physics
    • Optical Engineering
    • Materials Science

    Background:

    • Distributed temperature sensing (DTS) is crucial for monitoring environments.
    • Existing DTS systems face limitations in spatial resolution and accuracy over long distances.
    • Advancements in photon detection and fiber optics are key to improving DTS.

    Purpose of the Study:

    • To develop a Raman distributed temperature sensor with enhanced spatial resolution and temperature accuracy.
    • To investigate the performance limitations of the sensor concerning fiber length and integration time.
    • To explore potential applications of the developed DTS technology.

    Main Methods:

    • Utilized standard telecom single-mode fibers.
    • Employed polarization-independent superconducting nanowire single-photon detectors (SSPDs).
    • Implemented Raman scattering principles for temperature measurement.

    Main Results:

    • Achieved 3 cm spatial resolution and 1.5 °C temperature accuracy on a 5 m fiber with 1-minute integration.
    • Demonstrated that spatial resolution is limited by laser pulse width, not the detector.
    • Identified chromatic dispersion and reduced laser repetition rate as factors affecting performance on longer fibers (e.g., 10 cm and 8 °C resolution on 500 m fiber with 3-minute integration).

    Conclusions:

    • The developed Raman DTS system offers centimetric spatial resolution over hundreds of meters.
    • The technology shows promise for 2D and 3D temperature mapping in complex systems.
    • Potential applications include electronic devices, particle detectors, and aerospace instrumentation.