Abstract Dissolved Gas Analysis (DGA) is a standout diagnostic strategy to recognise
incipient faults and monitor the condition of oil-immersed transformers. It correlates the …

Compared to the gas sensors of electrochemical and semiconductors, the non-dispersive
infrared technique (NDIR) can selectively detect multiple types of gases due to the …

A fiber-optic trace gas sensing system based on photoacoustic (PA) effect of solids is
reported. The modulated laser light absorbed by the gas is incident on a graphite sheet. The …

Power transformer represents an important equipment in electric power systems.
Transformers are not only a source of power outages for electric utilities, but they also affect …

Dissolved gases analysis (DGA) provides widely recognized practice for oil-immersed
power transformers, and it is mainly interpreted for fault diagnosis. In order to accurately …

This paper presents an optimized T-type resonant photoacoustic (PA) cell for methane (CH
4) gas detection. The noise transmission coefficients and PA field distributions of the T-type …

A highly sensitive multi-pass absorption enhanced photoacoustic (PA) spectrometer
(MPAEPAS) based on combined light sources for dissolved gas analysis (DGA) in oil has …

A low-cost miniature diffusive infrared photoacoustic (PA) sensor (MDIPS) was proposed
and designed for the detection of carbon dioxide. To reduce the volume and the power …

A silicon cantilever-enhanced photoacoustic spectroscopy (PAS)-based trace gas analyzer
with low gas consumption is presented. A silicon cantilever-based fiber-optic Fabry–Perot (F …

We propose a high-sensitivity compact dual-T-type resonant fiber-optic photoacoustic (DTR-
FOPA) sensor for simultaneous detection of two gases. The designed DTR-FOPA sensor …