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Appendix A : Technical Specifications for the Hydran M2-X
General
GENERAL
Description Continuous, on-line, intelligent gas-in-oil and moisture
Components Combined dual-function sensor and electronic enclosure
Response
Medium Mineral, insulating oil for transformers
Application Transformer monitoring, moisture level measurement (for the
ANALYTICAL PERFORMANCE
Principle • Gas: Vacuum-resistant gas-permeable membrane and
Sampling
Method
Measurement • Gas: 25 - 2,000 ppm (volume/volume, H2 equivalent)*
Range • Moisture: 0 - 100% RH
Accuracy • Gas: ± 10 % of reading ± 25 ppm (Ref.: ASTM D3612)
Repeatability
Limit
Gas Relative • H2: 100 % of concentration
Sensitivity • CO: Typical 15 ± 4 % of concentration
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transmitter with optional, external sensors monitoring
Hydrogen (H
), carbon monoxide (CO), acetylene (C
2
ethylene (C
H
), relative humidity in oil (%RH)
2
4
evaluation of dangerous conditions, bubbling temperature and
aging rate) and detection of incipient faults in oil-filled electrical
equipment
combustible gas detector
• Moisture: Thin-film capacitive sensor
• Flooded port with 1.5 in NPT male threads
• Moisture: ± 2 %RH (Ref.: saturated salt solutions)
• Gas: Better than ± 5 % or ± 5 ppm
• Moisture: 2 %RH
• C2H2: Typical 8 ± 2 % of concentration
Hydran* M2-X Installation Guide
H
),
2
2
MA-028
Rev. 2.1, 11-Jun-20
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