Product Core Brief
- Model: HYDRAN M2
- Brand: GE (General Electric / GE Grid Solutions)
- Series: Hydran Transformer Monitoring
- Core Function: Continuously monitors dissolved fault gases (H2, CO, C2H2, C2H4) and oil moisture to detect incipient transformer faults.
- Product Type: Online Dissolved Gas Analyzer (DGA) & Moisture Transmitter
- Key Specs: H2/Composite Gas, %RH Moisture, IEEE/IEC Models, No Moving Parts
- Condition: New Original (New Surplus)
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Online Transformer Gas & Moisture Monitor |
| Measured Gases | H2, CO, C2H2, C2H4 (Composite or H2-only options) |
| Moisture Measurement | Relative Humidity (%RH) & ppm |
| Installation | Single Valve Mount, No Pump/Moving Parts |
| Communication | RS-485 (Standard), TCP/IP, DNP3, Modbus |
| Power Supply | 90-264 Vac, 47-63 Hz |
| Environmental Rating | NEMA 4X / IP66 Enclosure |
| Compliance | IEEE & IEC Transformer Mathematical Models |

GE HYDRAN M2
Product Introduction
Proactive transformer health monitoring is essential for preventing catastrophic failures and unplanned outages in critical power infrastructure. The GE HYDRAN M2 is a compact, permanently installed online monitoring device that continuously tracks dissolved fault gases and moisture levels in transformer oil. By detecting early signs of insulation degradation, partial discharge, or overheating, it provides maintenance teams with actionable data long before traditional annual oil sampling would reveal a problem.
Field engineers and asset managers rely on the HYDRAN M2 because its solid-state sensor design eliminates pumps and moving parts, drastically reducing maintenance requirements and failure points. The unit’s ability to calculate IEEE/IEC transformer mathematical models onboard transforms raw gas data into meaningful health indicators, enabling condition-based maintenance strategies for medium to large power transformers.
Key Selling Points & Differentiators
- True Online DGA Monitoring: Continuously measures H2, CO, C2H2, C2H4, and moisture without manual sampling, providing real-time fault detection and trend analysis.
- Zero Moving Parts Design: Utilizes a vacuum-resistant gas-permeable membrane and solid-state sensors; no pumps, no filters, no moving parts, ensuring ultra-low maintenance and high reliability.
- Onboard IEEE/IEC Modeling: Calculates transformer mathematical models (e.g., winding hotspot, aging rate) directly on the device, converting raw ppm/%RH data into actionable asset health insights.
- Rigorous Live Bench Testing: Every unit undergoes a 24-hour continuous load test with gas/moisture simulation and communication verification before shipping.
- New Surplus Availability: Factory-sealed condition with verified source traceability, bypassing typical OEM lead times for critical grid monitoring hardware.
- Anti-Counterfeit Verification: Serial numbers are checked against manufacturer databases during incoming inspection to guarantee authenticity.

IC200ALG230D
FAQ
Will this HYDRAN M2 work with my existing SCADA/DCS system?
Yes. The HYDRAN M2 supports standard industrial protocols including DNP3 (serial and TCP/IP), Modbus, and RS-485. It can integrate directly into most utility SCADA systems, asset management platforms, or GE’s Perception software for fleet-level monitoring. Always verify your communication protocol and baud rate settings before installation.
I have a HYDRAN M2-X on hand. Can I use it as a direct replacement?
The M2-X is the next-generation successor to the M2, featuring extended sensor life and enhanced diagnostics. While they share similar form factors and communication protocols, firmware and configuration parameters may differ. The M2-X is generally backward-compatible, but always verify your existing software version and sensor calibration requirements before substitution.
Do I need to calibrate this unit in the field after installation?
No. The HYDRAN M2 is factory-calibrated and does not require field calibration. The unit performs full system self-diagnostics and auto-compensation upon startup. Simply install on the valve, purge air, and power up—the device will begin reporting valid data immediately.
What happens if the sensor membrane gets contaminated?
The sensor uses a vacuum-resistant, gas-permeable membrane that is designed to reject oil and particulates while allowing fault gases to permeate. However, never touch the membrane with fingers or tools, and avoid high-pressure water streams or solvents during cleaning. If contamination is suspected, the unit’s self-diagnostics will flag a sensor fault, and the membrane can be replaced without removing the entire unit.
Is there a warranty on this new surplus unit?
Yes. All new surplus modules come with a standard 12-month functional warranty. If the unit fails during normal operation within that period, we provide a direct replacement. We also include our internal test report with every shipment so you can verify the 24-hour load test and sensor accuracy results before installation.







