Vaisala DGA laboratory – a look behind the scenes Senja Leivo Senior Industry Expert, Vaisala Published: Mar 8, 2023 Power Generation and Transmission We recently took a behind-the-scenes look into Vaisala's DGA lab. The DGA laboratory is a world-class facility, responsible for developing entirely new methods and workflows for analyzing gas solubilities in different mineral oils and other insulation liquids. At its heart, research is born out of pure curiosity — the applications come later. That's why Vaisala employs tens of scientists in over 40 laboratories to conduct fundamental research. View the video above to learn more about what really happens behind one of the lab doors. The secret behind Vaisala's advanced online DGA The DGA laboratory's work supports the performance development of our top-of-the-line instruments, such as the Optimus™ OPT100 online DGA monitor. Their comprehensive work in evaluating measurement uncertainties has been greatly helpful in making Vaisala's methods robust and reliable. For our scientists, the work is all about making a leap into knowledge. The lab's work, just like everything we do at Vaisala, is based on the thought that innovations don’t simply happen — they are the result of scientific research. And research never stops. That's Robust Science.
Guruprasad Dec 19, 2023 Are the response of GC/HSS results are very similar to those of Online DGA.I am an Ex Agilent engineer used to work with Agilent DGA systems. Reply
Senja Leivo Dec 22, 2023 Dear Guruprasad, Ideally the results are rather similar. However, some differences are obvious, due to many different factors. With head space (HS) type gas extraction, used typically with GC, relatively small portion of gases are extracted from oil and measured. The total gas concentrations are then calculated using gas solubility coefficients. Those calculations increase uncertainty and deviation between different methods. However, the biggest uncertainty is always related to oil sample quality i.e. how it’s been collected, transported, stored and handled in laboratory. Monitors again have their own uncertainties. However, monitors tend to provide better and more consistent gas trending over time. This means there is often some bias between the different methods, but the trend should be similar. Best regards, Senja Leivo Reply
