Dissolved Gas in Power Transformer Oil:

Optimus™ DGA Monitor OPT100
Advanced DGA The world’s first maintenance-free multi-gas DGA monitor now comes with the groundbreaking, robustly reliable total gas pressure method for detecting ambient air leaks into your sealed power transformer. That’s robust technology enabled by Vaisala science — that’s Optimus™ OPT100. No consumables of any kind required. No carrier or calibration gases to monitor or replace No internal column or measurement components to replace No fixed filters, filter wheels, membranes or capillary tubes to repair or replace

Moisture, Hydrogen and Temperature Transmitter MHT410
Robust online key gas monitor for power transformers Compatible with all insulation liquids, including silicon oil. Secure your power transmission and distribution. The MHT410 helps prevent power outages and detect possible faults before they escalate. The end-result? Lower total cost of ownership and more secure operation. The MHT410 works in-situ, measuring directly from your transformer insulation liquid. Your gain? Reliable hydrogen trend reading as well as fast moisture data.