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Journal articles on the topic 'Sensor CO2'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Widodo, Slamet, M. Miftakul Amin, and Adi Sutrisman. "The Design of The Monitoring Tools Of Clean Air Condition And Dangerous Gas CO, CO2 CH4 In Chemical Laboratory By Using Fuzzy Logic Based On Microcontroller." E3S Web of Conferences 31 (2018): 10008. http://dx.doi.org/10.1051/e3sconf/20183110008.

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There are many phenomena that human are exposed to toxins from certain types such as of CO2, CO2 and CH4 gases. The device used to detect large amounts of CO, CO2, and CH4 gas in air in enclosed spaces using MQ 135 gas sensors of different types based on the three sensitivity of the Gas. The results of testing the use of sensors MQ 135 on the gas content of CO, CO2 and CH4 received by the sensor is still in the form of ppm based on the maximum ppm detection range of each sensor. Active sensor detects CO 120 ppm gas, CO2 1600 ppm and CH4 1ppm "standby 1" air condition with intermediate rotary f

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Sabando, Bravo Kenia Elizabeth, Mendoza Marlon Renne Navia, and Jorge Luis Zambrano-Martinez. "Review of studies on sensor networks for CO2 monitoring." Serie Científica de la Universidad de las Ciencias Informáticas 16, no. 4 (2023): 24–41. https://doi.org/10.5281/zenodo.10070855.

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Currently, in metropolitan areas, the amounts of polluting gases are increasing, which causes the growth of global warming. One of the leading gases causing the greenhouse effect is carbon dioxide (CO2). For this reason, its monitoring and control is a highly studied topic worldwide due to the various problems in the ecosystem. One of the ways to monitor CO2 levels in the environment is through devices with specialised sensors and wireless communication through a sensor network. This research paper presents a bibliographic review of studies on sensor networks for CO2 monitoring. The objective

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Wang, Guangwei, Hongzhen Chen, and Yuanhui Wu. "Influence of Heat Disturbance on the Performance of YSZ based CO2 Sensor with Compound of Li2CO3-BaCO3-Nd2O3 as Auxiliary Sensing Electrode." Journal of New Materials for Electrochemical Systems 23, no. 4 (2020): 244–51. http://dx.doi.org/10.14447/jnmes.v23i4.a04.

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Suddenly changes and fluctuations of temperature often occur in the operational environment of the CO2 electrochemical sensor. In this work, the YSZ based potentiometric CO2 sensor having Li2CO3-BaCO3-Nd2O3 compound as its auxiliary sensing material was prepared. And the effects of several types of heat disturbance on the performance of this kind of sensor ware studied. The results indicate that the sensors after heat disturbances respond similarly with the sensor as prepared, which presents rapid and correct response for the change of CO2 concentration within the experimental range of 271-576

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Munz, Hannah, Joachim Ingwersen, and Thilo Streck. "On-Site Sensor Calibration Procedure for Quality Assurance of Barometric Process Separation (BaPS) Measurements." Sensors 23, no. 10 (2023): 4615. http://dx.doi.org/10.3390/s23104615.

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Barometric process separation (BaPS) is an automated laboratory system for the simultaneous measurement of microbial respiration and gross nitrification rates in soil samples. To ensure optimal functioning, the sensor system, consisting of a pressure sensor, an O2 sensor, a CO2 concentration sensor, and two temperature probes, must be accurately calibrated. For the regular on-site quality control of the sensors, we developed easy, inexpensive, and flexible calibration procedures. The pressure sensor was calibrated by means of a differential manometer. The O2 and CO2 sensors were simultaneously

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Dubey, Ravish, Arina Telles, James Nikkel, et al. "Low-Cost CO2 NDIR Sensors: Performance Evaluation and Calibration Using Machine Learning Techniques." Sensors 24, no. 17 (2024): 5675. http://dx.doi.org/10.3390/s24175675.

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The study comprehensively evaluates low-cost CO2 sensors from different price tiers, assessing their performance against a reference-grade instrument and exploring the possibility of calibration using different machine learning techniques. Three sensors (Sunrise AB by Senseair, K30 CO2 by Senseair, and GMP 343 by Vaisala) were tested alongside a reference instrument (Los Gatos precision greenhouse gas analyzer). The results revealed differences in sensor performance, with the higher cost Vaisala sensors exhibiting superior accuracy. Despite its lower price, the Sunrise sensors still demonstrat

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Müller, Michael, Peter Graf, Jonas Meyer, et al. "Integration and calibration of non-dispersive infrared (NDIR) CO<sub>2</sub> low-cost sensors and their operation in a sensor network covering Switzerland." Atmospheric Measurement Techniques 13, no. 7 (2020): 3815–34. http://dx.doi.org/10.5194/amt-13-3815-2020.

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Abstract. More than 300 non-dispersive infrared (NDIR) CO2 low-cost sensors labelled as LP8 were integrated into sensor units and evaluated for the purpose of long-term operation in the Carbosense CO2 sensor network in Switzerland. Prior to deployment, all sensors were calibrated in a pressure and climate chamber and in ambient conditions co-located with a reference instrument. To investigate their long-term performance and to test different data processing strategies, 18 sensors were deployed at five locations equipped with a reference instrument after calibration. Their accuracy during 19 to

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Karadöl, Hayrettin. "Development of new two methods based on low-cost sensors for determination of calcium carbonate contents of soils." Pakistan Journal of Agricultural Sciences 59, no. 06 (2022): 965–72. http://dx.doi.org/10.21162/pakjas/22.148.

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The chemical analysis of CaCO3 contents of soils provide information about not only efficiency of soil for supplying plant with nutrients but also identification of factors affecting this efficiency in the soil. The aim of the current experiment was to develop new methods based on sensors and compare with conventional Scheibler method. The CO2 liberated by the action of HCl on CaCO3 content of the soil in a reaction bottle and an accumulation chamber was determined by pressure sensor and CO2 sensor, respectively. The CaCO3 contents of soils were estimated using the regression equation of stand

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Salamone, F., S. Sibilio, and M. Masullo. "Low-cost carbon dioxide concentration sensors for assessing air quality in the built environment: an on-site evaluation of their measurement performance." Journal of Physics: Conference Series 2600, no. 10 (2023): 102019. http://dx.doi.org/10.1088/1742-6596/2600/10/102019.

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Abstract Carbon dioxide (CO2) concentration is commonly used to determine indoor air quality. However, wearable environmental monitoring devices have not considered CO2 content, because they have mainly focused on the outdoor environment. Our goal is to develop a new wearable monitoring system for indoor research purposes that also incorporates a CO2 concentration sensor. We evaluated the performance of two low-cost CO2 sensors, the Senseair K30 and the Sensirion SCD30, by comparing them with a professional reference sensor in two different environments: a Test Cell and the LabZEB of ITC-CNR.

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Hawchar, Amer, Solomon Ould, and Nick S. Bennett. "Carbon Dioxide Monitoring inside an Australian Brewery Using an Internet-of-Things Sensor Network." Sensors 22, no. 24 (2022): 9752. http://dx.doi.org/10.3390/s22249752.

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Maintaining a high standard of indoor air quality (IAQ) is vital to ensuring good human health. The concentration of CO2 in air is a good proxy for IAQ, while high levels of CO2 have been shown to cause cognitive or physiological impairment. Work environments that generate CO2 as an inherent part of their business present a unique and significant risk in terms of poor IAQ. Craft breweries generate CO2 and, unlike larger breweries, often lack the technology to capture and re-use the fermentation CO2 for beer carbonation. The purpose of this study is to demonstrate that the venting of fermentati

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Boudaden, Jamila, Armin Klumpp, Hanns-Erik Endres, and Ignaz Eisele. "Capacitive CO2 Sensor." Proceedings 1, no. 4 (2017): 472. http://dx.doi.org/10.3390/proceedings1040472.

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Sanmugavelan, Kuberahventhan, Mohd Hafiz Jali, Siti Amaniah Mohd Chachuli, Sulaiman Wadi Harun, and Siddharth Thokchom. "Europium Oxide Thick Films for CO2 Gas Sensing." Journal of Advanced Research in Micro and Nano Engineering 36, no. 1 (2025): 47–57. https://doi.org/10.37934/armne.36.1.4757.

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The fabrication of effective sensing technology for real-time carbon dioxide (CO2) monitoring is required due to the serious environmental and health risks posed by the atmosphere's rising CO2 levels. The current study investigates the development and characterisation of thick films of Europium oxide (Eu2O3) by screen-printing method for CO2 gas sensing applications. The primary objective is to create a high-performance sensor that can operate effectively at room temperature. The research entails fabricating three thick films of Eu2O3 gas sensors identified as sample1, sample2, and sample3 wer

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Handlogten, Mary E., Naoki Shiraishi, Hisataka Awata, Chunfa Huang, and R. Tyler Miller. "Extracellular Ca2+-sensing receptor is a promiscuous divalent cation sensor that responds to lead." American Journal of Physiology-Renal Physiology 279, no. 6 (2000): F1083—F1091. http://dx.doi.org/10.1152/ajprenal.2000.279.6.f1083.

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The extracellular Ca2+-sensing receptor (CaR) responds to polycations, including Ca2+ and neomycin. This receptor is a physiological regulator of systemic Ca2+ metabolism and may also mediate the toxic effects of hypercalcemia. A number of divalent cations, including Pb2+, Co2+, Cd2+, and Fe2+, are toxic to the kidney, brain, and other tissues where the CaR is expressed. To determine which divalent cations can activate the CaR, we expressed the human CaR in HEK-293 cells and measured activation of phospholipase A2(PLA2) and the mitogen-activated protein kinase p42ERK in response to potential a

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Yang, Lung Jieh. "Gas Permeation in Polydimethylsiloxane In Situ Monitoring by Silicon Pressure Sensors." Advanced Materials Research 74 (June 2009): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amr.74.113.

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This paper proposes a new way to detect the gas-leakage through PDMS. We use PDMS instead of Pyrex #7740 glass to seal the backside V-grooves of silicon pressure sensors. We put the packaged sensor into a pressurized chamber with CO2 at 300 psi. By observing the output voltage of the pressure sensor, the time history for CO2 permeating into the sensor cavity was easily found. In experiments, we use several PDMS membranes with different thickness, from 45 to 2000 μm, to package the pressure sensors and investigate the gas-leakage of PDMS. The gas leaking through PDMS is shown to be governed by

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Whitehill, Andrew R., Russell W. Long, Shawn P. Urbanski, Maribel Colón, Andrew Habel, and Matthew S. Landis. "Evaluation of Cairpol and Aeroqual Air Sensors in Biomass Burning Plumes." Atmosphere 13, no. 6 (2022): 877. http://dx.doi.org/10.3390/atmos13060877.

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Cairpol and Aeroqual air quality sensors measuring CO, CO2, NO2, and other species were tested on fresh biomass burning plumes in field and laboratory environments. We evaluated the sensors by comparing 1 min sensor measurements to collocated reference instrument measurements. The sensors were evaluated based on the coefficient of determination (r2) between the sensor and reference measurements, as well as by the accuracy, collocated precision, root mean square error (RMSE), and other metrics. In general, CO and CO2 sensors performed well (in terms of accuracy and r2 values) compared to NO2 se

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Vivek, Panghal. "GAS DETECTION USING SOLID-STATE ELECTRONIC SENSORS FOR CARBON DIOXIDE." International Journal of Applied and Advanced Scientific Research (IJAASR) 8, no. 1 (2023): 6–9. https://doi.org/10.5281/zenodo.7663073.

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Carbon dioxide (CO2) detection is crucial for uses in environmental protection, human health, and security, and even in outer space. Our group has investigated a new chemiresistive sensor for CO2 detection using a nanocomposite of multiwall carbon nanotubes (MWCNTs) and iron oxide (Fe2O3). Sensors have been shrunk down to the size of a chip (1 cm 2 cm). As a result of the broad range of CO2 concentrations within which the sensor performed well, it was concluded that the sensor had good sensing performance (100–6000 ppm). The sensing materials' structural characteristics were studied

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Ming, An Jie, Yao Hui Ren, Yu Zhang, et al. "A Compact Infrared Gas Sensor Based on an Asymmetry Gas Cavity." Key Engineering Materials 645-646 (May 2015): 1111–14. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.1111.

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Many gas molecules absorb electromagnetic radiation at characteristic wavelengths in the infrared region. This absorption can be used to identify defined substances like CO2, ammoniac, and so far. This study presents a comparative analysis of parameters of infrared radiation source and detector hardware that are most important for the creation of portable optical nondispersive infrared (NDIR) gas sensors. One of the central issues in the design of this kind of sensors is the geometry of the sensor cell. In this paper we investigate an asymmetry sensor cavity and predict the performance using T

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Azizi, Shoaib, Ramtin Rabiee, Gireesh Nair, and Thomas Olofsson. "Effects of Positioning of Multi-Sensor Devices on Occupancy and Indoor Environmental Monitoring in Single-Occupant Offices." Energies 14, no. 19 (2021): 6296. http://dx.doi.org/10.3390/en14196296.

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The advancements in sensor and communication technologies drive the rapid developments in the applications of occupancy and indoor environmental monitoring in buildings. Currently, the installation standards for sensors are scarce and the recommendations for sensor positionings are very general. However, inadequate sensor positioning might diminish the reliability of sensor data, which could have serious impacts on the intended applications such as the performance of demand-controlled HVAC systems and their energy use. Thus, there is a need to understand how sensor positioning may affect the s

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Sugawara, Tsutomu, Hiroshi Matsumoto, Hiroki Ito, Shingo Sato, and Masanari Kokubu. "Co-fired Platinum High Temperature Sensor Element." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, HiTEC (2016): 000056–60. http://dx.doi.org/10.4071/2016-hitec-56.

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Abstract In recent years, initiatives for improving the fuel consumptions have been accelerated to reduce the CO2 emissions in exhaust gas from an automotive engine; as a measure against global warming. One of the known techniques to reduce CO2 emissions, is more accurate temperature measurement of the engine. For such application, sensors such as thermistors or thin-film platinum temperature sensors have been widely used for sensing exhaust gas temperature. Especially, the thin-film platinum temperature sensors were favorable because of its linearity in resistance to temperature dependensy an

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Zhang, Hongyi. "Optimization of Electrochemical Sensors and Their Application in CO2 Detection." Transactions on Materials, Biotechnology and Life Sciences 4 (August 29, 2024): 25–30. http://dx.doi.org/10.62051/m8ww7q92.

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In response to the increasing global greenhouse gas content, electrochemical sensors with the advantages of existing main detection methods have the problem of being very sensitive to temperature, and long-term exposure to greenhouse gases will seriously affect the service life. From the aspects of sensitivity, selectivity, internal structure and working principle, this research points out the research progress of existing electrochemical sensors for detecting carbon dioxide (CO2), which consist of ionic liquid base, solid polymer electrolyte, room temperature fluorinated anionic liquid and bo

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Zhu, Jiadeng. "Functionalized Carbon Nanotubes Enabled High-Performance Printable CO₂ Sensors Along with the Corresponding Aging Study." ECS Meeting Abstracts MA2025-01, no. 12 (2025): 1037. https://doi.org/10.1149/ma2025-01121037mtgabs.

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Gas sensors have been considered critical components of intelligent detection systems, which have received significant attention in recent decades. Notably, carbon dioxide (CO2) sensors are essential in various industrial processes, air quality management, winery and brewery operations, agriculture, soil management, etc. Due to the effective interaction between CO2 and imine groups, polyethyleneimine (PEI), which consists of numerous imine groups, is the most used candidate for CO2 gas detection. Additionally, incorporating functionalized carbon nanotubes (f-CNTs) into PEI developed in recent

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Aguado, Alicia, Sandra Rodríguez-Sufuentes, Francisco Verdugo, et al. "Verification and Usability of Indoor Air Quality Monitoring Tools in the Framework of Health-Related Studies." Air 3, no. 1 (2025): 3. https://doi.org/10.3390/air3010003.

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Indoor air quality (IAQ) significantly impacts human health, particularly in enclosed spaces where people spend most of their time. This study evaluates the performance of low-cost IAQ sensors, focusing on their ability to measure carbon dioxide (CO2) and particulate matter (PM) under real-world conditions. Measurements provided by these sensors were verified against calibrated reference equipment. The study utilized two commercial devices from inBiot and Kaiterra, comparing their outputs to a reference sensor across a range of CO2 concentrations (500–1200 ppm) and environmental conditions (21

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Suriano, Domenico, Gennaro Cassano, and Michele Penza. "Design and Development of a Flexible, Plug-and-Play, Cost-Effective Tool for on-Field Evaluation of Gas Sensors." Journal of Sensors 2020 (August 1, 2020): 1–20. http://dx.doi.org/10.1155/2020/8812025.

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Atmospheric pollution is one of the biggest concerns for public health. Air quality monitoring is currently performed by expensive and cumbersome monitoring stations. For this reason, they are sparse, and therefore, inadequate to provide enough accurate information on the personal exposure to pollutant gases. The current worldwide trend to address this issue consists in the use of low-cost small gas sensors, already available on the market, with a wide range of costs and performances. However, the performance of these sensors is heavily affected by the environmental conditions of the specific

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Oguchi, Kimio, and Ryoya Ozawa. "Human Presence Recognition in a Closed Space by using Cost-effective CO2 Sensor and the Information Gain Processing Method." Indonesian Journal of Electrical Engineering and Computer Science 5, no. 3 (2017): 549. http://dx.doi.org/10.11591/ijeecs.v5.i3.pp549-555.

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<p>The recent rapid progress in ICT technologies such as smart/intelligent sensor devices, broadband/ubiquitous networks, and Internet of everything (IoT) has advanced the penetration of sensor networks and their applications. The requirements of human daily life, security, energy efficiency, safety, comfort, and ecological, can be achieved with the help of these networks and applications. Traditionally, if we want some information on, for example, environment status, a variety of dedicated sensors is needed. This will increase the number of sensors installed and thus system cost, sensor

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Lee, Mingu, Syo Sugahara, Daijiro Omi, Michiya Fujita, and Kenichi Tonokura. "Development of continuous monitoring of ambient carbon dioxide using near-infrared quartz-enhanced photoacoustic spectroscopy." Japanese Journal of Applied Physics 63, no. 1 (2023): 017001. http://dx.doi.org/10.35848/1347-4065/ad1011.

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Abstract We demonstrate continuous measurement of carbon dioxide (CO2) in the atmosphere using quartz-enhanced photoacoustic spectroscopy (QEPAS) at 2.008 μm with a fiber-coupled distributed-feedback laser. The QEPAS sensor is composed of a quartz tuning fork with a resonance frequency f 0 of 12.4 kHz. The photoacoustic second-harmonic (2f) signal resulting from CO2 absorption was detected using a digital lock-in amplifier. The photoacoustic signal is proportional to the laser power. The limit of detection at an absorption line of 4980.13161 cm−1 with a line strength of 3.87 × 10−22 cm2 molecu

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Gaßner, Simon, Simon Essing, David Tumpold, Katrin Schmitt, and Jürgen Wöllenstein. "Miniaturized two-chamber photoacoustic CO₂ sensor with a wafer-bonded MEMS (micro-electro-mechanical systems) detector." Journal of Sensors and Sensor Systems 13, no. 2 (2024): 219–26. http://dx.doi.org/10.5194/jsss-13-219-2024.

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Abstract. The measurement of air quality, particularly the concentration of carbon dioxide (CO2), has gained significant interest due to increased public health awareness. Elevated concentrations of CO2 in the air have been linked to negative effects on cognitive functions and directly correlate with the quality of indoor air. This work presents the prototype of a miniaturized sensor module designed for sensing CO2 concentrations in the air. The sensor module utilizes the two-chamber photoacoustic concept and features a compact design combining an absorption cell with a wafer-bonded detector b

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Bellancini, Michele, Laura Cercenelli, Stefano Severi, Guido Comai, and Emanuela Marcelli. "Development of a CO2 Sensor for Extracorporeal Life Support Applications." Sensors 20, no. 13 (2020): 3613. http://dx.doi.org/10.3390/s20133613.

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Measurement of carbon dioxide (CO2) in medical applications is a well-established method for monitoring patient’s pulmonary function in a noninvasive way widely used in emergency, intensive care, and during anesthesia. Even in extracorporeal-life support applications, such as Extracorporeal Carbon Dioxide Removal (ECCO2R), Extracorporeal Membrane Oxygenation (ECMO), and cardiopulmonary by-pass (CPB), measurement of the CO2 concentration in the membrane oxygenator exhaust gas is proven to be useful to evaluate the treatment progress as well as the performance of the membrane oxygenator. In this

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Saad, Rana, Ahmed Gamal, Mohamed Zayed, et al. "Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature." Nanomaterials 11, no. 11 (2021): 3087. http://dx.doi.org/10.3390/nano11113087.

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Thin films of ZnO and ZnO/carbon nanotubes (CNTs) are prepared and used as CO2 gas sensors. The spray pyrolysis method was used to prepare both ZnO and ZnO/CNTs films, with CNTs first prepared using the chemical vapor deposition method (CVD). The chemical structure and optical analyses for all the prepared nanomaterials were performed using X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), and UV/Vis spectrophotometer devices, respectively. According to the XRD analysis, the crystal sizes of ZnO and ZnO/CNTs were approximately 50.4 and 65.2 nm, respectively. CNTs have

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Rui Qiao, Rui Qiao, Hai Yun Fan Hai Yun Fan, Cui Bing Bai Cui Bing Bai, et al. "Using Heterocycle to Improve the Selectivity of Rhodamine-6G Dye: Synthesis of Pyrrole-Modified Rhodamine-6G and its Recognition to Zn2+." Journal of the chemical society of pakistan 41, no. 2 (2019): 300. http://dx.doi.org/10.52568/000732/jcsp/41.02.2019.

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The fluorescent sensor XQN for Zn2+ based on rhodamine-6G have been designed and synthesized. XQN showed fluorescent specific selectivity and high sensitivity for Zn2+ against other metal ions such as Fe3+, Cr3+, Hg2+, Ag+, Ca2+, Cu2+, Pb2+, Cd2+, Ni2+, Co2+ and Mg2+ in CH3CN-PBS(phosphate buffer saline) (10 mM, v/v=7:3, pH = 7.4) solution. The distinct color change and the rapid emergence of fluorescence emission provided naked-eyes detection for Zn2+. The test strip results showed that these sensors could act as a convenient and efficient Zn2+ test kit. The recognition mechanism of the senso

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Dalvai Ragnoli, Martin, and Gabriel Singer. "The River Runner: a low-cost sensor prototype for continuous dissolved greenhouse gas measurements." Journal of Sensors and Sensor Systems 13, no. 1 (2024): 41–61. http://dx.doi.org/10.5194/jsss-13-41-2024.

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Abstract. Freshwater ecosystems are sources of the two most relevant greenhouse gases (GHGs): CO2 and CH4. Understanding the importance of freshwater ecosystems in the global carbon cycle and their role in global warming trends requires the accurate quantification of gas fluxes from the water phase to the atmosphere. These fluxes depend on the gas exchange velocity and the concentration gradient between the phases, which both cause high spatio-temporal variability in fluxes. On a global scale, the estimation of fluxes is limited by the lack of cheap and accurate methods to measure dissolved ga

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Santonico, Marco, Alessandro Zompanti, Anna Sabatini, et al. "CO2 and O2 Detection by Electric Field Sensors." Sensors 20, no. 3 (2020): 668. http://dx.doi.org/10.3390/s20030668.

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In this work an array of chemical sensors for gas detection has been developed, starting with a commercial sensor platform developed by Microchip (GestIC), which is normally used to detect, trace, and classify hand movements in space. The system is based on electric field changes, and in this work, it has been used as mechanism revealing the adsorption of chemical species CO2 and O2. The system is composed of five electrodes, and their responses were obtained by interfacing the sensors with an acquisition board based on an ATMEGA 328 microprocessor (Atmel MEGA AVR microcontroller). A dedicated

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von Oppeln-Bronikowski, Nicolai, Brad de Young, Dariia Atamanchuk, and Douglas Wallace. "Glider-based observations of CO<sub>2</sub> in the Labrador Sea." Ocean Science 17, no. 1 (2021): 1–16. http://dx.doi.org/10.5194/os-17-1-2021.

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Abstract. Ocean gliders can provide high-spatial- and temporal-resolution data and target specific ocean regions at a low cost compared to ship-based measurements. An important gap, however, given the need for carbon measurements, is the lack of capable sensors for glider-based CO2 measurements. We need to develop robust methods to evaluate novel CO2 sensors for gliders. Here we present results from testing the performance of a novel CO2 optode sensor (Atamanchuk et al., 2014), deployed on a Slocum glider, in the Labrador Sea and on the Newfoundland Shelf. This paper (1) investigates the perfo

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Kodu, Margus, Tea Avarmaa, Hugo Mändar, Rando Saar, and Raivo Jaaniso. "Structure-Dependent CO2 Gas Sensitivity of La2O2CO3 Thin Films." Journal of Sensors 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/9591081.

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Rare earth oxycarbonates are potential candidate materials for constructing simple and low-cost chemiresistive sensors for monitoring carbon dioxide (CO2) gas in the living and working environment for personal comfort and health reasons. Also, measurement of CO2 concentrations is needed in many industrial processes. Specifically, sol-gel made nanoparticles of Nd and La oxycarbonates have been studied previously as novel CO2 gas sensor materials. In this paper, pulsed laser deposition of La oxycarbonate (La2O2CO3) thin films was studied and structural properties of obtained thin films were char

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Fernández-Ramos, María Dolores, Fátima Mirza-Montoro, Luis Fermín Capitán-Vallvey, and Isabel María Pérez de Vargas-Sansalvador. "Near Infrared Sensor to Determine Carbon Dioxide Gas Based on Ionic Liquid." Coatings 11, no. 2 (2021): 163. http://dx.doi.org/10.3390/coatings11020163.

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In this study we present an NIR carbon dioxide gas sensor based on an inner filter process that includes an ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4), to improve its stability, dynamic behavior and lifetime, which are usually the main drawbacks with these sensors. The presence of CO2 causes a displacement of a simple boron-dipyrromethene-type fluorophore, azaBODIPY, as the pH indicator towards its acid form. This increases the emission intensity of Cr(III)-doped gadolinium aluminium borate (GAB) as the luminophore. The characterization of the prepared sensor wa

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Arvonen, Cody, Carlo Flores, Ara Bolander, et al. "Design of a Low-Cost Emissions Sensor for Potential Use in Developing Communities." International Journal for Service Learning in Engineering, Humanitarian Engineering and Social Entrepreneurship 19, no. 1 (2024): 16–27. http://dx.doi.org/10.24908/ijsle.v19i1.16597.

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Particulate matter (PM), carbon monoxide (CO), and carbon dioxide (CO2) emissions are key environmental and health risks. In Peru, biomass cookstoves are used by approximately 70% of rural households. This work describes the development of a low-costsensor system, in collaboration with a stove-certification laboratory in Peru, to measure cookstove emissions. Using an open fire cookstove, emissions were compared using the low-cost sensor system (~$300) and a commercial sensor system ($3000) currently used by the laboratory. Emissions trends for PM2.5 and CO were similar for both sensors. Howev

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Takakura, Tadashi, Haruki Sunagawa, Maro Tamaki, Takae Usui, and Naoki Taniai. "IN SITE NET PHOTOSYNTHESIS MEASUREMENT OF A PLANT CANOPY IN A SINGLE-SPAN GREENHOUSE." JOURNAL OF ADVANCES IN AGRICULTURE 7, no. 2 (2017): 1015–20. http://dx.doi.org/10.24297/jaa.v7i2.6092.

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Using newly developed sensor units that were more compact and accurate than earlier units (Takakura et al., 2009), this study was conducted to estimate the net photosynthesis of a plant canopy in a practical greenhouse during plant cultivation. Net photosynthesis and the ventilation flow rate are two unknowns in this greenhouse system, with adequate growth of bitter gourd plants. Environmental conditions related to evapotranspiration from the canopy and CO2 flux from the soil surface were measured respectively using the developed sensor units and a box-type CO2 concentration sensor. Heat flux

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Zhao, Jingtao, Jiaxin Lian, Wenyue Pan, Jialing Du, Ziteng Liu, and Longshan Zhao. "A Bifunctional Fluorescence Probe Based on AIE-ICT Strategy for Visual Detection of Cu2+/Co2+ in Complex Matrix." Molecules 28, no. 5 (2023): 2059. http://dx.doi.org/10.3390/molecules28052059.

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A novel fluorescence chemical sensor-based probe 1-{[(E)-(2-aminophenyl)azanylidene]methyl}naphthalen-2-ol (AMN) was designed and synthesized, which performed a “naked eye” detection ability toward Cu2+ and Co2+ based on aggregation-induced emission (AIE) fluorescence strategy. It has sensitive detection ability for Cu2+ and Co2+. In addition, the color changed from yellow-green to orange under the sunlight, realizing the rapid identification of Cu2+/Co2+, which has the potential of on-site visual detection under the “naked eye”. Moreover, different “on” and “off” fluorescence expressions were

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De Acha, Nerea, César Elosúa, and Francisco J. Arregui. "Development of an Aptamer Based Luminescent Optical Fiber Sensor for the Continuous Monitoring of Hg2+ in Aqueous Media." Sensors 20, no. 8 (2020): 2372. http://dx.doi.org/10.3390/s20082372.

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A fluorescent optical fiber sensor for the detection of mercury (Hg2+) ions in aqueous solutions is presented in this work. The sensor was based on a fluorophore-labeled thymine (T)-rich oligodeoxyribonucleotide (ON) sequence that was directly immobilized onto the tip of a tapered optical fiber. In the presence of mercury ions, the formation of T–Hg2+-T mismatches quenches the fluorescence emission by the labeled fluorophore, which enables the measurement of Hg2+ ions in aqueous solutions. Thus, in contrast to commonly designed sensors, neither a fluorescence quencher nor a complementary ON se

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Bakti, Andi Ikhtiar, Marco Alfiano Laoh, Handy Indra Regain Mosey, Jumriadi, Megastin M. Lumembang, and Verna Albert Suoth. "Sistem Monitoring Suhu, Kelembaban dan Kadar CO2 di Udara Berbasis Internet of Things." Jurnal MIPA 13, no. 2 (2024): 94–98. http://dx.doi.org/10.35799/jm.v13i2.56234.

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Sistem Internet of things (IoT) menyediakan data secara real-time dengan tingkat akurasi yang tinggi yang dapat memonitoring suhu, kelembaban dan kadar CO2 di udara yang diintegrasikan dengan aplikasi mobile, dan dashboard online. Penelitian ini, dibangun sistem monitoring suhu, kelembaban dan kadar CO2 di udara. Sistem monitoring ini terhubung dengan platform Blynk IoT sehingga data suhu, kelembaban dan kadar CO2 di udara dapat diakses dari mana saja dan kapan saja selama perangkat terhubung ke jaringan internet. Sensor MQ132 digunakan untuk mendeteksi kadar CO2 di udara, sementara sensor DHT

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Hidayat, N., M. S. Aziz, G. Krishnan, et al. "Tapered optical fibers using CO₂ laser and their sensing performances." Journal of Physics: Conference Series 2432, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2432/1/012013.

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Abstract In this paper, we proposed a simple tapering process of optical fibers using controlled CO2 laser. This is a response to the call for the rapid development of affordable, efficient, and reliable optical sensors. A laser with power of 36 W was focused on a small section of three optical fibers having core/cladding diameters in micrometer of 10/125 (sensor A), 62.5/125 (sensor B), and 200/225 (sensor C). The sensors were tested on solutions having refractive indices of 1.3325 to 1.4266. Our investigation revealed that sensor C offered highest sensitivity. Therefore, further characteriza

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Ahire, Satish Arvind, Ashwini Ashok Bachhav, Thansingh Bhavsing Pawar, Arun Vitthal Patil, Swapnil Sampatrao Shendge, and Prashant Bhimrao Koli. "Green Synthesis of Ceria Nanoparticles Using Azadirachta Indica Plant Extract: Characterization, Gas Sensing and Antibacterial Studies." Material Science Research India 18, no. 3 (2021): 285–97. http://dx.doi.org/10.13005/msri/180304.

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In the present investigation we have fabricated the cerium dioxide (CeO2) nanoparticles by green route. While preparing the cerium dioxide nanoparticles by co-precipitation method, Neem leaf extract mixed into the precursor of cerium. The synthesized nanoparticles of CeO2 were used for the preparation of thick film sensor by using screen printing strategy. The fabricated CeO2 sensor was characterized by XRD, SEM, EDS and TEM techniques. The structural characteristics investigated by x-ray diffraction technique (XRD). XRD confirms the formation of cubic lattice of CeO2 material. The surface, te

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Curcoll, Roger, Josep-Anton Morguí, Armand Kamnang, Lídia Cañas, Arturo Vargas, and Claudia Grossi. "Metrology for low-cost CO<sub>2</sub> sensors applications: the case of a steady-state through-flow (SS-TF) chamber for CO<sub>2</sub> fluxes observations." Atmospheric Measurement Techniques 15, no. 9 (2022): 2807–18. http://dx.doi.org/10.5194/amt-15-2807-2022.

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Abstract. Soil CO2 emissions are one of the largest contributions to the global carbon cycle, and a full understanding of processes generating them and how climate change may modify them is needed and still uncertain. Thus, a dense spatial and temporal network of CO2 flux measurements from soil could help reduce uncertainty in the global carbon budgets. In the present study, the design, assembly, and calibration of low-cost air enquirer kits, including CO2 and environmental parameters sensors, is presented. Different types of calibrations for the CO2 sensors and their associated errors are cal

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Suzuki, Takuya, Frieder Lauxmann, Andre Sackmann, et al. "Operando Investigations of Rare-Earth Oxycarbonate CO2 Sensors." Proceedings 2, no. 13 (2018): 801. http://dx.doi.org/10.3390/proceedings2130801.

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In this work, we have succeeded in synthesizing monoclinic and hexagonal La2O2CO3 using two different routes and revealed that both of them are sensitive to CO2 to the same degree. Moreover, we observed that the resistance of the sensor based on hexagonal phase is much higher and more stable than the one of the sensors based on the monoclinic phase. Using Operando and time resolved XRD measurements, we have also demonstrated that the resistivity of the sensor based on monoclinic La2O2CO3 increases because of the material transformation into the hexagonal phase during an exemplarily aging proce

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Challener, William A., Ansas M. Kasten, Sachin Dekate, et al. "Multipoint Pressure and Temperature Sensing Fiber Optic Cable for Monitoring CO2 Sequestration." MRS Advances 1, no. 21 (2016): 1501–12. http://dx.doi.org/10.1557/adv.2016.119.

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ABSTRACTA highly accurate multi-point pressure measurement system based on MEMS pressure sensors spliced into a fiber optic cable and suitable for downhole deployment in a CO2 sequestration well was designed, developed and tested in the laboratory. An interrogator system based on a pulsed laser excitation was shown to be capable of multiple (potentially 60+) point sensor measurements on a single fiber. The interrogator was interfaced with the GE PredixTM industrial internet to demonstrate a remote monitoring system. Sensor packages were fabricated and tested at high temperatures and pressures

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Yasmin Sofea Rosland, Nur, Khadijah Ismail, Siti Nooraya Mohd Tawil, and Siti Hasnawati Jamal. "PEDOT:PSS/GO NANOCOMPOSITE FOR INDOOR CO2 SENSOR." International Journal of Advanced Research 9, no. 08 (2021): 473–81. http://dx.doi.org/10.21474/ijar01/13292.

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Carbon dioxide (CO2) which is a colourless and odourless gas, requires an efficient detection, as excessive amount in the environment would possibly leads to global warming. This work discusses on an environmentally friendly and non-toxic CO2 sensor for indoor air monitoring. The fabricated sensor is developed by using poly(3,4ethylenedioxythiophene):poly(4styrenesulfonate)/ graphene oxide (PEDOT:PSS/GO) nanocomposite. Nanocomposite characterisations are performed by using field-emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) to confirm excellent properties of PEDOT:P

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Roxana Varlan, Anca, and Willy Sansen. "Micromachined conductometric p(CO2) sensor." Sensors and Actuators B: Chemical 44, no. 1-3 (1997): 309–15. http://dx.doi.org/10.1016/s0925-4005(97)00223-2.

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Loghin, Florin C., Aniello Falco, Jose F. Salmeron, Paolo Lugli, Alaa Abdellah, and Almudena Rivadeneyra. "Fully Transparent Gas Sensor Based on Carbon Nanotubes." Sensors 19, no. 20 (2019): 4591. http://dx.doi.org/10.3390/s19204591.

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In this paper, we demonstrate the feasibility of realization of transparent gas sensors based on carbon nanotubes (CNTs). Both sensing layer and electrodes consist of CNTs deposited by spray deposition. The transparent sensor—with a transmittance higher than 60% in both sensing layer and electrodes—is characterized towards NH3 and CO2 and compared with a reference sensor with the same active layer but evaporated Au electrodes. In particular, the sensitivity towards NH3 is virtually identical for both reference and transparent sensors, whereas the transparent device exhibits higher sensitivity

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El-Safoury, Mahmoud, Christian Weber, Hassan Yassine, Jürgen Wöllenstein, and Katrin Schmitt. "Towards a Miniaturized Photoacoustic Sensor for Transcutaneous CO2 Monitoring." Sensors 24, no. 2 (2024): 457. http://dx.doi.org/10.3390/s24020457.

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A photoacoustic sensor system (PAS) intended for carbon dioxide (CO2) blood gas detection is presented. The development focuses on a photoacoustic (PA) sensor based on the so-called two-chamber principle, i.e., comprising a measuring cell and a detection chamber. The aim is the reliable continuous monitoring of transcutaneous CO2 values, which is very important, for example, in intensive care unit patient monitoring. An infrared light-emitting diode (LED) with an emission peak wavelength at 4.3 µm was used as a light source. A micro-electro-mechanical system (MEMS) microphone and the target ga

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Amsar, Amsar, Khairuman Khairuman, and Marlina Marlina. "PERANCANGAN ALAT PENDETEKSI CO2 MENGGUNAKAN SENSOR MQ-2 BERBASIS INTERNET OF THING." METHOMIKA Jurnal Manajemen Informatika dan Komputerisasi Akuntansi 4, no. 1 (2020): 73–79. http://dx.doi.org/10.46880/jmika.vol4no1.pp73-79.

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Salah satu gas yang sangat berbahaya bagi kesehatan manusia adalah Gas CO2, untuk mengetahui kadar di tempat tertentu mengandung CO2 tanpa menggunakan alat bantu pendeteksi akan sulit dilakukan, karena Gas CO2 tersebut merupakan zat yang tidak dapat dilihat langsung oleh mata manusia, maka dalam penelitian ini dirancang sebuah alat pendeteksi CO2 yang dapat memberikan notifikasi kadar CO2 ke telegram berbasis Internet Of Things (IOT). Dalam peneltian ini alat yang digunakan untuk pengukuran kadar CO2 dengan menggunakan sensor MQ-2 untuk mendeteksi kadar dari karbon dioksida, sehingga kadar CO2

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Amsar, Amsar, Khairuman Khairuman, and Marlina Marlina. "Perancangan Alat Pendeteksi CO2 Menggunakan Sensor MQ-2 Berbasis Internet Of Thing." METHOMIKA: Jurnal Manajemen Informatika dan Komputerisasi Akuntansi 4, no. 1 (2020): 73–79. http://dx.doi.org/10.46880/jmika.v4i1.143.

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Salah satu gas yang sangat berbahaya bagi kesehatan manusia adalah Gas CO2, untuk mengetahui kadar di tempat tertentu mengandung CO2 tanpa menggunakan alat bantu pendeteksi akan sulit dilakukan, karena Gas CO2 tersebut merupakan zat yang tidak dapat dilihat langsung oleh mata manusia, maka dalam penelitian ini dirancang sebuah alat pendeteksi CO2 yang dapat memberikan notifikasi kadar CO2 ke telegram berbasis Internet Of Things (IOT) . dalam peneltian ini alat yang digunakan untuk pengukuran kadar CO2 dengan menggunakan sensor MQ-2 untuk mendeteksi kadar dari karbon dioksida, sehingga kadar CO

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Wang, Hai Rong, Jun Qiang Ren, Guo Liang Sun, and Di Cen. "Micro CO₂ Sensor Based on Li₂CO₃, Pt | Li₃PO₄ | Pt, Li₂TiO₃-TiO₂ Structure." Applied Mechanics and Materials 44-47 (December 2010): 2747–51. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2747.

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This paper presents a micro solid electrolyte CO2 gas sensor in which Li2CO3, Li2TiO3-TiO2 serves as sensing and reference electrodes respectively, and the Li3PO4 film acts as the electrolyte. The sensor was constructed in the sequent layers of O2, CO2, Li2CO3, Pt | Li3PO4 | Pt, Li2TiO3-TiO2, O2, CO2 on the Al2O3 substrate by MEMS process. Experimental results indicate that the micro solid-electrolyte CO2 gas sensor has a relatively rapid speed of response. By discussions, we may find that the improved performance will be realized by optimizing the primary parameters of the sensor.

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