Next Article in Journal
A Visual Dashboard to Track Learning Analytics for Educational Cloud Computing
Previous Article in Journal
Assessment of Bandaged Burn Wounds Using Porcine Skin and Millimetric Radiometry
Previous Article in Special Issue
A Highly Selective and Sensitive Fluorescent Chemosensor for Detecting Al3+ Ion in Aqueous Solution and Plant Systems
Open AccessArticle

Spectroscopy Transmittance by LED Calibration

Department of Mining and Civil Engineering, Technical University of Cartagena, 30202 Cartagena, Spain
Department of Information and Communications Technologies, Technical University of Cartagena, 30202 Cartagena, Spain
Department of Electronic Technology, Technical University of Cartagena, 30202 Cartagena, Spain
Authors to whom correspondence should be addressed.
Sensors 2019, 19(13), 2951;
Received: 30 May 2019 / Revised: 25 June 2019 / Accepted: 2 July 2019 / Published: 4 July 2019
Local administrations demand real-time and continuous pollution monitoring in sewer networks. Spectroscopy is a non-destructive technique that can be used to continuously monitor quality in sewers. Covering a wide range of wavelengths can be useful for improving pollution characterization in wastewater. Cost-effective and in-sewer spectrophotometers would contribute to accomplishing discharge requirements. Nevertheless, most available spectrometers are based on incandescent lamps, which makes it unfeasible to place them in a sewerage network for real-time monitoring. This research work shows an innovative calibration procedure that allows (Light-Emitting Diode) LED technology to be used as a replacement for traditional incandescent lamps in the development of spectrophotometry equipment. This involves firstly obtaining transmittance values similar to those provided by incandescent lamps, without using any optical components. Secondly, this calibration process enables an increase in the range of wavelengths available (working range) through a better use of the LED’s spectral width, resulting in a significant reduction in the number of LEDs required. Thirdly, this method allows important reductions in costs, dimensions and consumptions to be achieved, making its implementation in a wide variety of environments possible. View Full-Text
Keywords: LED spectrophotometer; LEDs; water pollutants LED spectrophotometer; LEDs; water pollutants
Show Figures

Figure 1

MDPI and ACS Style

Carreres-Prieto, D.; García, J.T.; Cerdán-Cartagena, F.; Suardiaz-Muro, J. Spectroscopy Transmittance by LED Calibration. Sensors 2019, 19, 2951.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop