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Temperature Measurement Sites

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 Temperature

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,...

Thermosensation

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...

Assessing Body Temperature - Temporal Artery

Assessing Body Temperature - Temporal Artery

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...

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Updated: Apr 27, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

High-sensitivity temperature sensor based on a droplet-like fiber circle.

Jianglei Xie, Ben Xu, Yi Li

|July 1, 2014

Summary

A novel fiber optic temperature sensor uses a bent fiber to achieve high sensitivity. This low-cost sensor offers a temperature sensitivity of -3.102 nm/°C, comparable to advanced fiber sensors.

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Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Published on: March 8, 2020

Area of Science:

Photonics and Optical Sensing
Materials Science
Fiber Optics

Background:

Accurate temperature sensing is crucial in various industrial and scientific applications.
Existing high-sensitivity fiber optic sensors can be complex and expensive.
Developing cost-effective, high-performance temperature sensors remains an active research area.

Purpose of the Study:

To propose and demonstrate a low-cost, high-sensitivity fiber optic temperature sensor.
To investigate the sensing mechanism based on mode interference in a bent fiber.
To evaluate the sensor's performance and compare it with existing technologies.

Main Methods:

Fabrication of a fiber optic sensor by bending a coated single-mode fiber into a droplet-like circle.
Characterization of the sensor's transmission spectra under varying environmental temperatures.
Analysis of resonant dip shifts to determine temperature sensitivity.
Investigation of the effect of bending radius on sensor performance.

Main Results:

Observation of multiple resonant dips in the transmission spectra of the bent fiber.
Demonstration of a significant shift in resonant dips towards shorter wavelengths with increasing temperature.
Achieved a high temperature sensitivity of -3.102 nm/°C through linear fitting of experimental data.
Identified the large thermo-optical coefficient difference between silica and polymer as the source of high sensitivity.

Conclusions:

The proposed bent fiber optic sensor offers a simple, low-cost, and high-sensitivity solution for temperature measurement.
The sensor's performance is comparable to more complex photonic crystal fiber sensors.
The design principles and findings provide a foundation for developing advanced fiber optic sensing devices.