MyDoble / Portal Login EN SEARCH PRODUCTS SOLUTIONS SERVICES TRAINING ABOUT EVENTS Blog Videos Downloads Support Contact Us Careers Calisto® H1 Hydrogen Sensor for Transformers Safely measures hydrogen levels The Calisto™ H1 includes the industry’s premier solid-state hydrogen sensor technology in a robust yet compact package. It continuously samples the oil in transformers to detect spikes in hydrogen levels that are often indicative of an electrical fault. The Calisto H1 is Doble’s latest product from the Calisto Condition Monitoring Platform, which includes the Calisto T1, Calisto 2, Calisto 5 and Calisto 9 DGA monitors as well as the doblePRIME suite of products. VIDEO FEATURES & BENEFITS APPLICATIONS RESOURCES BLOGS Understand asset condition with doblePRIME™ Condition Monitoring Platform for Transformers The doblePRIME Condition Monitoring Platform for Transformers gives you a clear, consolidated means to assess overall transformer condition. Now you can pick the appropriate level of condition monitoring for an individual transformer or group of transformers in one location. LEARN MORE RELATED DOBLE PRODUCTS Calisto® 9 Complete DGA + Moisture Diagnostic Monitor Calisto® 5 5 Fault Gases + Moisture Diagnostic Monitor Calisto® 2 Hydrogen, Moisture + Carbon Monoxide Detection Monitor Calisto® Hydrogen + Moisture Detection Monitor Calisto® T1 Condition Monitoring System doblePRIME Condition Monitoring Platform for Transformers Contact Sales for more information PRODUCTS Condition Monitoring Enterprise Asset Management In-Service Testing & Assessment Oil Standards Off-line Testing & Assessment Protection Testing Security & Compliance SOLUTIONS Transformers Bushings Protective Relays Circuit Breakers Rotating Machines Cables SERVICES Client Services Consulting & Testing Services Laboratory Services Equipment Rentals Doble Resource Library SUPPORT Overview Downloads Trouble & Failure Reporting Form ABOUT Discover Doble Leadership Team News Careers Contact Us Quality Commitment EVENTS Doble Events Training Industry Events Webinars Earning CEUs Doble is an ESCO Technologies Company Doble is an ISO 9001 & ISO/IEC 17025 & 17034 Certified Company. © 2021 Doble Engineering Company. All Rights Reserved. Privacy Policy & Legal Disclosures.