ZY-DGA500 oil chromatography on-line monitoring device is our company's latest on-line monitoring system for gas and micro-water content in oil, and can integrate on-line monitoring system of iron core ground current according to customer requirements, and intelligent components that meet the national IEC61850 communication protocol. The monitoring device is connected to the transformer body only through the oil inlet and outlet ports, and is easy to install. It adopts the oil circulation working method, no pollution, no fuel consumption, and accurate sampling. The shortest monitoring period can be set to 1 hour, and the maximum detection period can be set arbitrarily. The software system is powerful and easy to operate. It can query real-time data, real-time maps, historical data, trend charts, etc.