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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

1.8K
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...
1.8K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.1K
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,...
1.1K
Thermometers and Temperature Scales01:22

Thermometers and Temperature Scales

5.6K
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...
5.6K
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

614
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
614
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

59
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 short...
59
Physical Methods for Controlling Microbial Growth: Temperature01:23

Physical Methods for Controlling Microbial Growth: Temperature

49
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
49

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Fabrication and Testing of Photonic Thermometers
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Miniature GaN optoelectronic temperature sensor.

Binju Wang, Kang Fu, Jianwei Fu

    Optics Letters
    |August 15, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a novel temperature sensing system using a Gallium Nitride (GaN) chip integrated with plastic optical fiber (POF). The system detects temperature changes by measuring reflected light pulses, offering a miniature optoelectronic solution.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Sensor Technology

    Background:

    • Miniature optoelectronic sensing systems are crucial for advanced applications.
    • Integrating plastic optical fibers (POF) with monolithically integrated transmitters and receivers offers new possibilities.
    • Gallium Nitride (GaN) based optoelectronic chips are suitable for integrated sensing.

    Purpose of the Study:

    • To propose and demonstrate a novel temperature sensing system.
    • To integrate a GaN optoelectronic chip with POF and an aluminum reflector.
    • To utilize monolithically integrated multiple quantum well (MQW) diodes for sensing.

    Main Methods:

    • Monolithic integration of GaN optoelectronic chip with transmitter and receiver using identical MQW structures.
    • Utilizing an aluminum reflector to modulate light reflection based on temperature-induced deformation.
    • Coupling reflected light back into POF for detection by the on-chip receiver.
    • Reading temperature information as electrical signals.

    Main Results:

    • The system successfully detects temperature changes from 20.1°C to 100°C.
    • An optically induced electrical signal change from -3.04 µA to -3.13 µA was observed within this temperature range.
    • Demonstrated the feasibility of using thermal deformation for optical sensing.

    Conclusions:

    • The monolithically integrated GaN device is a promising platform for optoelectronic temperature sensing.
    • This approach offers a compact and efficient solution for miniature sensing systems.
    • Further development could lead to widespread applications in various fields.