Market-leading DGA sensitivity and accuracy

The Calisto® 9 online DGA monitor provides the data you need for early detection and diagnosis of impending failures, cost-efficient condition-based maintenance and optimal loading decisions.

Accuracy By Design
Features best-in-market accuracy bench-marked by clients, laboratories, and industry working groups — ensuring the reliability of the DGA results they provide.

Early Detection
Market-leading lower detection limits and a very broad measurement range ensure that you are getting all the information needed to detect and diagnose faults as early as possible.

Easy Deployment
Supplied with DNP3, Modbus and optional IEC 61850 communication protocols for easy deployment within existing communications and SCADA networks.

Fits Your Monitoring Program
Designed to fit your monitoring program, it can operate as a standalone DGA monitor or as part of the Doble Calisto Condition Monitoring Platform.

A New Way for Infrared DGA

The Calisto® R9 brings something new to the market of DGA monitors: long-term accuracy without calibration gas cylinders to manage. This breakthrough is achieved by combining a novel IR gas measurement technology with a game-changing calibration system that uses water vapor as a calibrant to maintain accuracy over time.

Calisto R9 combines these innovations with robust design features that have been continuously improved through many years of serving Calisto customers around the world. These include membrane extraction to keep the gas measurement system free of oil and oil vapors, our sludge-tolerant pump that eliminates the need for oil filtration, and precision thermal controls for DGA accuracy.