How often should we perform dissolved gas analysis on transformer oil?

For critical transformers, a dissolved gas analysis should be done every 6-12 months – or after any abnormal electrical event. Fluidex provides inline and portable sampling solutions that simplify regular testing routines. They also manufacture filtration systems with built-in DGA sampling ports, so you can monitor gas levels after oil purification. Early detection of hydrogen, acetylene, or ethylene can prevent costly failures.