Because hydrogen is the early indicator of all transformer faults, Morgan Schaffer created the Calisto and Calisto 2 to measure low-level dissolved hydrogen with exceptional accuracy and stability. Both monitors provide additional value with on-line moisture readings. A highly popular model in the Australasian region, the Calisto 2 also monitors dissolved carbon monoxide, a gas often generated when transformer cellulose overheats, providing a more complete picture of the transformer behaviour. Calisto and Calisto 2 are supplied standard with numerous connection options and DNP3.0 and MODBUS communication protocols to allow easy deployment within existing communications and SCADA networks. The Calisto 2 features a unique architecture allowing optional fast swap-over to the multi-gas Calisto 5 or 9 monitor in the event of a significant fault being detected.