SF6 Gas Insulated Switchgear

Cambridge Sensotec Ltd

Cambridge Sensotec Ltd specialises in the design and manufacture of gas analysis instruments under the brand name Rapidox. Based in the UK, the company has an established worldwide distribution network and ISO 9001 accreditation.

The Rapidox range includes bench mounted, rack mounted and portable analysers designed for industrial processes, quality control applications, environmental monitoring and research and development experiments. Powerful bespoke software is supplied with every analyser, providing users with many useful functions and features.

Initially specialising in oxygen analysis, Cambridge Sensotec has since diversified and extended its product range into other gas analysis markets including SF6 gas monitoring. The company’s Rapidox SF6 gas analyser range is designed for many applications including the testing of high voltage gas insulated electrical equipment, medical monitoring and process gas analysis.


Cambridge Sensotec offers a range of high-quality SF6 gas analysis instruments and accessories.

Continual product development has seen the introduction of the Rapidox SF6 6100 Portable, followed by the Rapidox SF6 6100 Pump Back, a fully automatic gas analyser. Both products are designed for applications such as analysing and monitoring the quality of SF6 within medium and high voltage, gas-insulated electrical equipment. Multiple sensor configurations are available to suit a range of application requirements.

The Rapidox SF6 6100 Bench is a triple gas analyser designed for calculating SF6, SO2 and H2O (dew point) in applications including gas-insulated electrical equipment, laboratory research and medical monitoring. Additionally a range of complimentary accessories is available to enhance instrument functionality and prohibit the release of SF6 gas into the atmosphere.

Rapidox SF6 6100 Pump Back

Rapidox Pump Back SF6 Analyzer
The Rapidox SF6 6100 Pump Back is the latest in fully-automatic gas analysers and is designed for controlling and monitoring the quality of SF6.


Rapidox SF6 6100 Portable

Rapidox Portable SF6 AnalyzerThe Rapidox SF6 6100 Portable is designed for controlling and monitoring the quality of SF6 in MV & HV gas-insulated electrical equipment.


Rapidox SF6 6100 Bench

Rapidox Bench SF6 AnalyzerThe Rapidox SF6 6100 Bench mountable gas analyser is designed for controlling and monitoring the quality of SF6 gas over a range of applications.


Rapidox SF6 6100 Accessories

Rapidox SF6 Analyzer AccessoriesA range of accessories enhances the usability of the Rapidox range of SF6 gas analysers.


Contact us to discuss your SF6 requirement


Electrical arcs are a discharge of light and heat and can be caused within high voltage electrical power systems when conductive channels facilitate their formation.

SF6 is an extremely chemically stable, non-flammable and highly electronegative greenhouse gas with excellent dielectric properties. It is commonly used within high voltage electrical equipment as an electrical insulator, arc quenching and cooling medium.

Regular SF6 gas analysis as part of a maintenance schedule is essential in order to protect personnel and equipment. Early identification of decomposition products and moisture within the SF6 gas will avoid unnecessary shutdowns, outages and failures, in addition to reducing maintenance expenditures.

Typical applications include:Service Of SF6 Gas Insulated SwitchgearSF6 Gas Analysis As Part Of An Essential Maintenance Procedure

  • Controlling SF6 quality in gas insulated high voltage switches, bus bars, circuit breakers and transformers
  • Checking for the build-up of corrosive decomposition products such as SO2 present in SF6 gas
  • Measuring the moisture content of SF6 gas
  • Applying a condition based maintenance program (CBM) to extend the life cycle of the SF6 gas
  • Gas insulated high-voltage medical equipment
  • Magnesium and aluminium production
  • Medical monitoring and analysis, such as within Ophthalmology applications
  • Recovery and storage of gases for analysis or recycling
  • Testing SF6 process gas within semiconductor manufacturing
  • Detecting the presence of leaks and SF6 discharge



Stricter legislation has seen changes to the requirements of the electrical power industry in relation to the handling of SF6 gas. The Kyoto Protocol is an international agreement between nations that came into force in 2005. It commits its parties by mandating country-by-country reductions in greenhouse gas emissions. Due to the chemical stability of SF6 gas it has the potential to remain in the atmosphere for thousands of years. Under the Kyoto Protocol, SF6 gas has been identified as a greenhouse gas with a limitation as to the amount that can be released into the atmosphere.

Electricity PylonsElectrical EquipmentElectrical SwitchgearElectrical Transformer

The following links provide further information into current environmental legislation and the correct use of SF6 gas within the electrical industry.

Contact Us

Cambridge Sensotec Ltd are manufacturers of Rapidox gas analysis solutions.
Please contact us on +44 (0)1480 462142, or email info@cambridge-sensotec.co.uk
For further information on our Rapidox products please visit www.cambridge-sensotec.co.uk