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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

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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.
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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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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...
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Equivalent Capacitance01:19

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From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
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Equivalent Capacitance01:19

Equivalent Capacitance

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Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
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Capacitors and Capacitance01:18

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A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
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Updated: Jan 31, 2026

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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Dew Point Measurement Using a Carbon-Based Capacitive Sensor with Active Temperature Control.

Jing Nie, Yichuan Wu1, Qiyang Huang1

  • 1Tsinghua-Berkeley Shenzhen Institute , Tsinghua University , Shenzhen 518055 , China.

ACS Applied Materials & Interfaces
|December 20, 2018
PubMed
Summary
This summary is machine-generated.

A novel carbon-based dew point sensor utilizes laser-induced graphene (LIG) interdigital electrodes for precise humidity measurements. This capacitive sensor achieves high accuracy and stability, outperforming existing electrical sensing methods.

Keywords:
dew point sensorgraphene oxidehumiditylaser-induced graphenereduced graphene oxide

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Nanotechnology

Background:

  • Laser-induced graphene (LIG) offers excellent electrical conductivity and 3D porous structures, making it suitable for advanced sensor applications.
  • Accurate dew point measurement is critical in various environmental and industrial monitoring applications.

Purpose of the Study:

  • To develop a novel capacitive dew point sensor using laser-induced graphene interdigital electrodes (IDE).
  • To investigate the performance and stability of the developed sensor under diverse environmental conditions.

Main Methods:

  • Fabrication of porous graphene IDEs from polymer films via laser ablation, followed by transfer to a PDMS substrate.
  • Electrospraying a graphene oxide (GO) adsorption layer for humidity sensing.
  • Utilizing a Peltier device for controlled water vapor condensation and dew point identification via capacitor equilibrium.

Main Results:

  • The developed carbon-based dew point sensor demonstrated high precision, achieving ≤±0.8 °C DP.
  • The sensor exhibited excellent stability and repeatability in performance.
  • The precision surpassed that of other dew point instruments based on electrical sensing parameters (±1.0 °C DP).

Conclusions:

  • The hydrophilic dew point sensing system based on LIG IDEs is a viable and high-performance alternative for accurate dew point measurements.
  • The sensor's precision, stability, and repeatability highlight its potential for advanced environmental monitoring.