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SF6 - General information, SF6-Sensors & relevant applications

Under normal conditions, sulfur hexafluoride (SF6) is a colorless and odorless, non-toxic and non-flammable gas. Discover all the info about this gas and about the SF6 sensors from Wi.Tec-Sensorik ...

Table of Contents

General information on SF6 / Sulfur hexafluoride

Under normal conditions, sulfur hexafluoride (SF6) is a colorless and odorless, non-toxic and non-flammable gas which, like nitrogen and CF4, behaves in an extremely inert manner. Sulfur hexafluoride is used as an insulating gas in medium- and high-voltage technology, for example in gas-insulated switchgear (GIS) with high-voltage switches and in gas-insulated pipelines (GIL) in completely enclosed systems with operating voltages from 6 kV to 800 kV. SF6 also serves as an extinguishing gas to interrupt the switching arc in circuit breakers. Due to its high global warming potential (GWP=23500), this gas may only be used under strict conditions.

Gas sensors from Wi.Tec-Sensorik for the precise measurement of SF6

Overview Products and Measurement Ranges

  Measuring range (*)
  100
Vol.%
50
Vol.%
30
Vol.%
20
Vol.%
10
Vol.%
5
Vol.%
1
Vol.%
5,000
ppm
2,000
ppm
1,000
ppm
500
ppm
300
ppm
100
ppm
50
ppm
10
ppm
1
ppm
Kombi.sens
INFRA.sens AK2/P – SF6
INFRA.sens AK100
INFRA.sens AK250
(*) Full scale value (F.S.)
For other measuring ranges please refer to our further datasheets

Product Previews

Some relevant Applications to SF6

Gas Insulated Switchgear Monitoring

Gas Insulated Switchgear Monitoring

  • Detection limit (3 sigma) < 0,1 Vol.% 
  • Linearity error < 0,5 % FS (Fullscale) 
  • Including Temperature-compensation 5 - 45 °C 
  • Including pressure compensation 600 - 1200 mbar 
  • Ready to use module 
INFRA.sens® AK2/μP compact // INFRA.sens® AK20G compact  To save the atmosphere – for quality and leakage measurement In gas-insulated high- and medium-voltage switchgear, sulfur hexafluride (SF6) is used as an …
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Customer Specific Projects

Customer Specific Projects

  • You have a measurement task that goes beyond the usual standards and are looking for a competent partner?
  • Please contact us. Your measurement task is our challenge!
  • The employees of Wi.Tec-Sensorik GmbH have extensive expertise in the field of industrial gas measurement technology and sensor signal processing.
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Humidity Measurement

Humidity Measurement 

  • Detection limit: < 5 ppm H2O
  • Fast response time (t90 < 10 sec)
  • Efficient alternative for a dew point mirror measurement
  • Low maintenance operation
  • Can be combined with other gas measurements such as CO2, CO, CnHm, CH4 etc.
INFRA.sens® CO2 / HC / H2O – AK250GC / TBH piped  Compact alternative to laser and dew point mirror sensors  Humidity measurement is an important component of gas measurement technology, …
Read MoreHumidity Measurement