Transformers are the most critical assets of the power system, and there continuous monitoring is required. Single gas DGA on transformer oil can analyze much about the transformer health, but it alone can't detect all the faults, so multi-gas dissolved gas analysis is required to draw the correct image about the transformer health. EPESOL provided IEEE/IEC/ETRA/Duval complaint advanced devices can analyze the concentration of up to ten gases in the oil with near-real-time results. These low-cost, online, and offline devices continuously monitor the transformer's health and inform the customer about any malfunctioning.