Broadband infrared and narrow-linewidth laser sources are the two ways to build a photoacoustic DGA monitor. Here is what the choice changes — and what it does not.
Hydrogen is invisible to photoacoustic spectroscopy — not a design flaw but molecular physics. Here is why, and why the hydrogen channel matters more than the gas count.
How laser photoacoustic spectroscopy (L-PAS) measures dissolved gases with zero background, no carrier gas, no consumables — principle and advantages for DGA.
Online DGA accuracy starts with oil-gas separation. Compare headspace, vacuum, membrane and vacuum-assisted membrane degassing plus oil-circuit safety requirements.
L-PAS physics for engineers: how a narrow-linewidth laser turns light into heat and sound for zero-background, sub-ppm dissolved gas analysis in transformer oil.
New 50-page technical white paper on laser photoacoustic spectroscopy (L-PAS) for online DGA of transformer oil — technology fundamentals, detection limits, system architecture, diagnostics, and economics. Free instant download.
Photoacoustic spectroscopy has passed through several distinct eras in the fifty years it has been applied to dissolved gas analysis, and the story is usually […]
