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UV–Vis Spectrometers01:14

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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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...
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
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Modular system for UV-vis-NIR radiation measurement with wireless communication.

J S Botero-Valencia1, M Mejia-Herrera1

  • 1Grupo de Sistemas de Control y Robótica, Instituto Tecnológico Metropolitano, Medellín, Colombia.

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Summary

A new modular sensor system measures Ultraviolet (UV) and Near-Infrared (NIR) radiation, crucial for fields like renewable energy and agriculture. This Internet of Things (IoT) enabled device offers adaptable, remote data collection and storage.

Keywords:
Internet of thingsModularNear Infrared-NIRSpectrum measurementUltraviolet-UVVisible-VIS

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Area of Science:

  • Physics
  • Engineering
  • Environmental Science

Background:

  • Ultraviolet (UV) and Near-Infrared (NIR) radiation significantly impact diverse fields including renewable energy, agriculture, architecture, interior design, and psychology.
  • Accurate remote measurement and data storage of light spectrum data are essential for research and application in these areas.
  • Existing instrumentation may lack the modularity and real-time data capabilities required for comprehensive light spectrum analysis.

Purpose of the Study:

  • To present a novel, modular sensor system for the remote measurement and storage of UV-vis-NIR radiation.
  • To develop an adaptable system leveraging Internet of Things (IoT) technology for real-time data acquisition.
  • To create a versatile tool for researchers and professionals across various scientific and design disciplines.

Main Methods:

  • Development of a modular system incorporating six multi-spectral sensors capable of 54 distinct measurements.
  • Implementation of data transmission to the cloud in real-time or storage on micro SD cards.
  • Time-stamping of data using Unix format, synchronized via a Network Time Protocol (NTP) server.
  • Standardized sensor enclosures with PTFE diffusers and mounting on an extruded aluminum guide rail for adaptability.

Main Results:

  • The system successfully acquires and processes UV-vis-NIR radiation data from multiple sensors.
  • Data can be transmitted remotely or stored locally with accurate time-stamping.
  • The modular design and standardized mounting allow for flexible sensor arrangement and system adaptability.
  • PTFE diffusers enhance measurement accuracy by providing consistent light diffusion.

Conclusions:

  • The presented modular sensor system provides a flexible and adaptable solution for remote UV-vis-NIR radiation measurement.
  • The IoT integration enables efficient real-time data acquisition and storage, supporting research across multiple disciplines.
  • This system offers a valuable tool for advancing studies in renewable energy, agriculture, architecture, and beyond.