SF6 gas analyzer
Updated 2026-10-27
Data records
- Analyzer variants cover the alternative insulating gases that replace SF6, including fluoronitrile mixtures and mixtures of nitrogen, oxygen and carbon dioxide.
- In automatic mode the measurement ends when the sensor readings meet a stability criterion, so its duration varies; the analyzer runs from a rechargeable battery or from the mains and is carried in a wheeled, impact-resistant field case.
- Decomposition products such as sulfur dioxide and hydrogen fluoride, which arcing and discharges produce and which are toxic and corrosive, are measured with electrochemical sensors; several sensors are combined in one analyzer so that it measures several quality parameters.
- An SF6 gas analyzer determines the quality of the insulating gas in gas-filled equipment by measuring its humidity, its composition or purity, and its decomposition products, the number of substances read depending on the sensors fitted.
- The sample gas is held in an internal storage vessel during the measurement and pumped back into the gas compartment afterward, or captured in an external recovery bag, so that the closed measurement releases no gas to the atmosphere.
- Leak detection is a separate instrument concept: a cordless handheld sniffer gives a visual and audible alarm when it meets SF6 escaping at a joint or valve, a portable infrared monitor measures the SF6 concentration in the ambient air, and a sprayed solution confirms the exact point by bubbling.
- Moisture is measured as a dew point, by a chilled-mirror sensor that cools a mirror in the gas flow until dew or frost forms on it, or by a capacitive humidity sensor; the dew point is referred to a stated pressure when it is reported.
- An online transmitter measures the dew point, pressure and temperature of the insulating gas continuously and calculates its density, the dew point at atmospheric pressure and a moisture concentration from them, so that trends are followed with no sampling and no release of gas.
- Purity, the share of SF6 in the gas, and the mixing ratio of a gas mixture are determined from the speed of sound in the sample.
- The instrument class is written SF6 gas analyzer. Value: SF6 gas analyzer.
Elsewhere in the family
- SF6 Gas Quality related entry on Electrical Testing Reference
- SF6 Gas Quality related entry on Switchgear Testing Reference
Sources
- DILO article page, SF6 Gas Leak Detection, web page edition, DILO. Held as: Public page. Publisher page
- DILO product page, Multi-Analyser SF6 - devices to determine SF6 quality, web page edition, DILO. Held as: Public page. Publisher page
- Electrical Testing Reference editorial taxonomy, Electrical Testing Reference editorial taxonomy of test methods, 2026-10 edition, Electrical Testing Reference. Held as: Own observation.
- Vaisala product page, DPT145 Multiparameter Transmitter for SF6 Gas, web page edition, Vaisala. Held as: Public page. Publisher page
- WIKA product page, Model GA11 - Analytic instrument for SF6 gas and alternative insulating gases, web page edition, WIKA. Held as: Public page. Publisher page
Changelog (24 entries)
| Date | Revision | Change |
|---|---|---|
| 2026-10-27 | created (instr.sf6-gas-analyzer.alternative-gases) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.alternative-gases) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.automatic-mode-power) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.automatic-mode-power) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.decomposition-products) | |
| 2026-10-27 | revised (instr.sf6-gas-analyzer.decomposition-products) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.decomposition-products) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.definition) | |
| 2026-10-27 | revised (instr.sf6-gas-analyzer.definition) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.definition) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.gas-return) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.gas-return) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.leak-detection) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.leak-detection) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.moisture-dew-point) | |
| 2026-10-27 | revised (instr.sf6-gas-analyzer.moisture-dew-point) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.moisture-dew-point) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.online-transmitter) | |
| 2026-10-27 | revised (instr.sf6-gas-analyzer.online-transmitter) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.online-transmitter) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.purity) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.purity) | |
| 2026-10-27 | created (instr.sf6-gas-analyzer.title) | |
| 2026-10-27 | review_status unreviewed -> software_reviewed (instr.sf6-gas-analyzer.title) |
Cite this page
Cite the governing standard for the fact itself; cite this page as the finding aid.
"SF6 gas analyzer." Test Instrument Reference. 2026-10-27. https://www.testinstrumentreference.com/instruments/sf6-gas-analyzer/.
Test Instrument Reference, SF6 gas analyzer (Oct. 27, 2026), https://www.testinstrumentreference.com/instruments/sf6-gas-analyzer/.
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title = {SF6 gas analyzer},
howpublished = {\url{https://www.testinstrumentreference.com/instruments/sf6-gas-analyzer/}},
organization = {Test Instrument Reference},
publisher = {Test Instrument Reference},
year = {2026},
note = {last substantive change 2026-10-27}
}{{cite web |title=SF6 gas analyzer |website=Test Instrument Reference |publisher=Test Instrument Reference |url=https://www.testinstrumentreference.com/instruments/sf6-gas-analyzer/ |date=2026-10-27 |access-date=}}