Details
| Original language | English |
|---|---|
| Article number | 7001307 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Instrumentation and Measurement |
| Volume | 73 |
| Early online date | 1 Dec 2023 |
| Publication status | Published - Jan 2024 |
Abstract
— We report the development of a battery-driven, portable, and ultrasensitive optical gas sensor for parts per billion (ppb)-level formaldehyde (H2CO) diagnostics. The sensor consists of an interband cascade laser exploiting the intense H2CO absorption line at 3.6 µm, an open-path multipass gas cell with 26.4-m pathlength, and homemade electronics for signal processing, data acquisition, and results display. Besides the advantage of being interference-free from other atmospheric constituents, the Allan deviation analysis reveals a minimum detection limit (MDL) of 1.42 ppb at a time resolution of 0.2 s. This limit can be enhanced to 43 parts per trillion (ppt) with an average time of 230 s. Ultimately, we successfully showcased the practical use of the portable sensor for detecting indoor H2CO.
Keywords
- Formaldehyde (HCO), indoor air quality, optical gas sensor
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: IEEE Transactions on Instrumentation and Measurement, Vol. 73, 7001307, 01.2024, p. 1-7.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A Portable ppb-Level Formaldehyde Sensor for Real-Time Air Quality Monitoring
AU - Duan, Kun
AU - Wu, Junjun
AU - Grabe, Tobias
AU - Lachmayer, Roland
AU - Ren, Wei
N1 - Funding Information: This work was supported in part by the General Research Fund under Grant 14208221; in part by the Collaborative Research Fund under Grant C4002-22Y; in part by the Innovation and Technology Fund, Hong Kong SAR, China, under Grant GHP/129/20SZ; and in part by the Natural Science Foundation of Shenzhen, China, under Grant JCYJ20200109143008165.
PY - 2024/1
Y1 - 2024/1
N2 - — We report the development of a battery-driven, portable, and ultrasensitive optical gas sensor for parts per billion (ppb)-level formaldehyde (H2CO) diagnostics. The sensor consists of an interband cascade laser exploiting the intense H2CO absorption line at 3.6 µm, an open-path multipass gas cell with 26.4-m pathlength, and homemade electronics for signal processing, data acquisition, and results display. Besides the advantage of being interference-free from other atmospheric constituents, the Allan deviation analysis reveals a minimum detection limit (MDL) of 1.42 ppb at a time resolution of 0.2 s. This limit can be enhanced to 43 parts per trillion (ppt) with an average time of 230 s. Ultimately, we successfully showcased the practical use of the portable sensor for detecting indoor H2CO.
AB - — We report the development of a battery-driven, portable, and ultrasensitive optical gas sensor for parts per billion (ppb)-level formaldehyde (H2CO) diagnostics. The sensor consists of an interband cascade laser exploiting the intense H2CO absorption line at 3.6 µm, an open-path multipass gas cell with 26.4-m pathlength, and homemade electronics for signal processing, data acquisition, and results display. Besides the advantage of being interference-free from other atmospheric constituents, the Allan deviation analysis reveals a minimum detection limit (MDL) of 1.42 ppb at a time resolution of 0.2 s. This limit can be enhanced to 43 parts per trillion (ppt) with an average time of 230 s. Ultimately, we successfully showcased the practical use of the portable sensor for detecting indoor H2CO.
KW - Formaldehyde (HCO)
KW - indoor air quality
KW - optical gas sensor
UR - http://www.scopus.com/inward/record.url?scp=85181165740&partnerID=8YFLogxK
U2 - 10.1109/TIM.2023.3338688
DO - 10.1109/TIM.2023.3338688
M3 - Article
AN - SCOPUS:85181165740
VL - 73
SP - 1
EP - 7
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
SN - 0018-9456
M1 - 7001307
ER -