High sensitivity open seven-channel multipass cell TDLAS system for trace gas online monitoring

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2026-05-01 Epub Date: 2026-02-04 DOI:10.1016/j.snb.2026.139553

Le Yang , Haotian Yuan , Hongfu Fang , Zhiheng Gao , Rende Ma , Yue Pan , Xuzhen Gao , Mingsheng Niu

{"title":"High sensitivity open seven-channel multipass cell TDLAS system for trace gas online monitoring","authors":"Le Yang , Haotian Yuan , Hongfu Fang , Zhiheng Gao , Rende Ma , Yue Pan , Xuzhen Gao , Mingsheng Niu","doi":"10.1016/j.snb.2026.139553","DOIUrl":null,"url":null,"abstract":"<div><div>A high-sensitivity seven-channel multipass cell trace gas detection system with optical path length (OPL) of 65.85 m, 44.778 m, 36.876 m, 27.218 m, 24.584 m and two 17.56 m based on TDLAS-WMS technology has been developed, which can simultaneously measure seven different component gases. Wavelength modulation spectroscopy (WMS) was applied to evaluate the system performance with 65.85 m and 44.778 m OPL by measurement of CH<sub>4</sub> and CO<sub>2</sub> at wavelengths of 1653 nm and 2004 nm, respectively. A convolutional neural network (CNN) based regression model was developed for predicting concentrations trends. Kalman filtering method was applied to improve detection sensitivity. Allan deviation analysis demonstrated detection limits (DL) of 3.9 ppb and 14.9 ppb for CH<sub>4</sub> and CO<sub>2</sub> at integration times of 281 s and 903 s, respectively. A 48-hour continuous monitoring atmospheric CH<sub>4</sub> and CO<sub>2</sub> confirmed the system stability and demonstrated suitability for real-time, online detection multiple greenhouse gases.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"454 ","pages":"Article 139553"},"PeriodicalIF":3.7000,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators B: Chemical","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0925400526001310","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/4 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}

引用次数: 0

Abstract

A high-sensitivity seven-channel multipass cell trace gas detection system with optical path length (OPL) of 65.85 m, 44.778 m, 36.876 m, 27.218 m, 24.584 m and two 17.56 m based on TDLAS-WMS technology has been developed, which can simultaneously measure seven different component gases. Wavelength modulation spectroscopy (WMS) was applied to evaluate the system performance with 65.85 m and 44.778 m OPL by measurement of CH₄ and CO₂ at wavelengths of 1653 nm and 2004 nm, respectively. A convolutional neural network (CNN) based regression model was developed for predicting concentrations trends. Kalman filtering method was applied to improve detection sensitivity. Allan deviation analysis demonstrated detection limits (DL) of 3.9 ppb and 14.9 ppb for CH₄ and CO₂ at integration times of 281 s and 903 s, respectively. A 48-hour continuous monitoring atmospheric CH₄ and CO₂ confirmed the system stability and demonstrated suitability for real-time, online detection multiple greenhouse gases.

查看原文本刊更多论文

用于痕量气体在线监测的高灵敏度开放七通道多通单元TDLAS系统

研制了基于tlas - wms技术的高灵敏度七通道多通细胞痕量气体检测系统，该系统的光程长度分别为65.85 m、44.778 m、36.876 m、27.218 m、24.584 m和2个17.56 m，可同时测量7种不同组分气体。采用波长调制光谱（WMS）技术，分别测量波长为1653 nm和2004 nm的CH4和CO2，在波长为65.85 m和44.778 m的OPL下对系统性能进行了评价。建立了一种基于卷积神经网络（CNN）的回归模型来预测浓度趋势。采用卡尔曼滤波方法提高检测灵敏度。Allan偏差分析表明，在积分时间分别为281 s和903 s时，CH4和CO2的检出限分别为3.9 ppb和14.9 ppb。对大气CH4和CO2的48小时连续监测证实了系统的稳定性，并证明了对多种温室气体实时在线检测的适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.