Category: SF6

After 17 years of establishment, Cambridge Sensotec is proud to have manufactured thousands of gas analysers for our customers worldwide.

Providing specialised gas analysis solutions to many prestigious academic and research institutes, the company has an established global distribution network and ISO 9001 accreditation.

Available in bench, portable and rack-mountable configurations with a multitude of sensor options, measurable gases include; O₂, CO₂, CO, H₂, Cl₂, N₂O, H₂O, CH₄, Cl, NO, C₂H₄, SO₂, CH₄, O₃, NH₃, SF₆ and H₂S.

Initially specialising in oxygen analysis, Cambridge Sensotec has since diversified and extended its product range into other gas analysis markets including SF₆ gas testing equipment. 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, process gas analysis and SF₆ gas purity tests.

To see our practices in work, view our video below.

Cambridge Sensotec also offers a range of Rapidox servicing in the UK and throughout the World with a network of agents and distributors. A full-service program is available using state-of-the-art automated calibration stations with certified and traceable calibration gases; all designed to calibrate your Rapidox gas analysers accurately and efficiently.

Gas detection equipment can be purchased through our shop for applications such as; confined spaces, agriculture, mining, oil and gas, diving, medical and modified atmosphere packaging (MAP). A comprehensive fixed gas detection installation and commissioning service is available for Oldham and Status Scientific instruments. This service includes national coverage, consultation, maintenance and calibration schedules.

The acquisition of Dynascan in 2014 has also provided us with the ability to deliver innovative leak detection system for those within the pharmaceutical, medical devices and food manufacturing industries.

For more information on our services, please email sales@cambridge-sensotec.co.uk or call +44 (0)1480 462142.

Sulphur hexafluoride (SF₆) gas is an arc quenching and cooling medium used in medium and high voltage electrical equipment as an electrical insulator. Under the Kyoto Protocol, SF₆ has been classified as a greenhouse gas and restrictions are in place to limit the amount allowed to be released into the atmosphere.

Both manufacturers and the users of their equipment are responsible for the reduction in SF₆ gas emissions. Organisations such as the International Electrochemical Commission (IEC) and the International Council on Large Electric Systems (CIGRE) provide guidance and regulatory information with regards to the handling of such a gas when it comes to maintenance.

When partial arcing or a failure occurs within electrical equipment, this can cause the creation of decomposition products such as sulphur dioxide and hydrogen fluoride. Analysis of SF₆ gas is recommended as part of a regular condition maintenance schedule, this ensures that equipment and personnel are properly protected. Early identification of elevated decomposition products will help to eliminate power outages and failures, alongside unnecessary inspections.

In order to ensure that no emissions occur throughout the testing process, Cambridge Sensotec designed the Rapidox SF₆ 6100 Pump Back gas analyser. The instrument draws a sample of SF₆ gas from the electrical equipment and analyses it in accordance with current IEC and CIGRE test configurations. It then pumps it back either automatically or manually, into the electrical equipment at pressure. Alternatively, the analyser can store the gas internally for proper disposal at a later time.

For further information about gas analysis applications or the Rapidox range of gas analysers, please contact us on +44 (0)1480 462142 or email info@cambridge-sensotec.co.uk. Additional information on SF₆ gas analysis can be found at www.sf6.co.uk.

SF₆ Gas Analysis

Cambridge Sensotec is continually developing its global reach and expansion into new markets. The importance and benefits of analysing SF₆ (Sulphur Hexafluoride) gas are becoming ever increasingly necessary within the electricity market, due to environmental regulations and potential reductions in maintenance costs.

Following the launch of the Rapidox SF₆ 6100 gas analyser range at the EP China show in October 2014, Cambridge Sensotec has been encouraged by the demand from the market. We are pleased to announce that the Rapidox SF₆ 6100 Pump Back version is to be exhibited at the following two trade shows this spring:

• Middle East Electricity, 2-4th March 2015, Dubai, Stand 4D10
• Global Electric Power Tech, 13-15th May 2015, South Korea

The Rapidox SF₆ 6100 range of gas analysers has been specifically designed to analyse SF₆ gas within medium and high voltage gas insulated electrical equipment. Both shows will provide Cambridge Sensotec with the opportunity to present the Rapidox SF₆ 6100 Pump Back to those involved in the procurement and installation of products and services within the ever growing markets of power, renewable and nuclear sectors.

For further information on Rapidox SF₆ 6100 gas analysers or advice and information on SF₆ gas analysis, please contact Cambridge Sensotec on +44 (0)1480 462142 or email sales@cambridge-sensotec.co.uk. Further details can also be found on our website: www.sf6.co.uk

Cambridge Sensotec announced the launch of their new Rapidox SF₆ 6100 Pump Back gas analyser at the EP China Exhibition in Beijing this month. The analyser is designed for monitoring SF₆ gas within medium and high voltage gas insulated electrical equipment. EP China is an international event organised by the China Electricity Council, showcasing electrical power automation equipment and technology to an international audience. The Rapidox SF₆ 6100 Pump Back gas analyser headlined the revamped range of Rapidox SF₆ gas analysers on the Cambridge Sensotec stand, attracting many international visitors.

Rapidox SF₆ 6100 Pump Back Gas Analyser

A fully automatic SF₆ gas analyser designed to store the gas samples or pump them back into the electrical equipment at high pressure, with no waste or emissions. Versatile and transportable, the battery powered instrument is housed within a heavy-duty Peli case, with wheels and a handle. It is the lightest instrument of its kind on the market, weighing only 21kg. Pre-programmed with ISO and CIGRE compliant test configurations, the portable analyser also includes an integrated thermal printer for printed test results on-site.

Rapidox SF₆ 6100 Portable Gas Analyser

Portable SF₆ gas analysis field instrument, with over 8 hours of battery life. The gas analyser includes a unique Rapidri system to accelerate dew point readings and is pre-programmed with ISO and CIGRE compliant test configurations. A gas output nozzle can be used in conjunction with the Rapidox Gas Recovery Bag. The analyser is housed within an IP66 case and features an integrated thermal printer.

Rapidox SF₆ 6100 Bench Gas Analyser

Bench mounted SF₆, SO₂ and H₂O analyser fitted with a unique Rapidri system. Features include fully programmable alarm circuits (volt free contacts), programmable analogue outputs (0-5V and 4-20mA), easy calibration (user selectable gases), RS232/RS485 communications and complete data logging software. Ideal for many SF₆ analysis applications within the power, medical and process industries. The analyser is also compatible with industry standard gas recovery systems.

EP China – Symposium

Cambridge Sensotec had a unique opportunity to present the Rapidox SF₆ 6100 Pump Back Gas Analyser at a symposium held at the EP China exhibition. The presentation outlined the benefits of using the Rapidox products within electricity power generation condition based maintenance programmes.
EP China hosted over 800 worldwide exhibitors from 16 countries/regions, exhibiting in 8 exhibition halls. Visitors included professionals from many worldwide industries including power supply, power grid construction and transformation, power generation, electricity maintenance and power research and design institutes. To find out more please visit the EP China website.

For further information on the new Rapidox range of SF₆ gas analysis instruments, please visit www.sf6.co.uk, telephone +44 (0)1480 462142 or email sales@cambridge-sensotec.co.uk

Sulphur hexafluoride (SF₆) is a man-made gas comprising of one sulphur and six fluoride atoms. SF₆ is extremely chemically stable, non-flammable and highly electronegative, with an excellent dielectric property of approximately 2.5 times more than air. Therefore it is commonly used in electrical switchgear, transformers and substations as an electrical insulation, arc quenching and cooling medium.

Electrical arcs are a discharge of light and heat and can be caused within electrical power systems such as switchgear when conductive channels facilitate their formation. The high electronegativity and heat transferring properties of SF₆ means that it is able to absorb the electron energy and lower the arc temperature through the capture of free electrons. The combination of the SF₆ gas and free electrons results in big, heavy ions with low rates of mobility, which effectively prevents electron avalanches and flashovers.

While under the influence of electrical discharges SF₆ partially decomposes, separating into its atomic components. During this time oxygen, moisture and decomposition products such as sulphur dioxide may be created. Unlike other insulating mediums, SF₆ gas has the unique ability to ‘self-heal’ with the atoms recombining after the discharge, this is one of the reasons for its widespread use within the electrical industry.

Regular analysis of SF₆ gas is essential as part of a maintenance schedule. In order to protect personnel and equipment, it is advised that periodic servicing is carried out throughout the lifetime of the equipment. Identification of elevated decomposition levels will ensure unnecessary inspections, outages and failures in addition to reducing maintenance expenditure and ensuring the effectiveness of the 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.

Stricter legislation has seen changes to the requirements of the electrical power industry in relation to the handling of SF₆ gas. As a result, Cambridge Sensotec has developed the new Rapidox SF₆ 6100 gas analyser featuring a pump back gas return function. The analyser is able to extract the SF₆ gas from equipment such as Gas Insulated Substations (GIS) and simultaneously analyse all measured gases. It will then pump it back at the same pressure as used within the electrical equipment by using a powerful 10 bar compressor. A vacuum purge cycle and gas storage system ensures that no air is allowed to contaminate the gas sample and that no SF₆ gas is allowed to escape during the testing period.

The Rapidox uses high precision infrared (IR) sensor technology for the analysis of SF₆ gas. Infrared sensor technology is based on the principle that some gases absorb IR radiation at specific wavelengths. It is advantageous in that it supplies the user with a rapid response, is immune to poisoning and contamination and has the ability to operate in the absence of oxygen.

Decomposition products sulphur dioxide (SO₂) and moisture (H₂O) may also be measured by the Rapidox SF₆ 6100 gas analyser, using electrochemical and advanced ceramic sensor technology respectively. Additional sensors for gases such as carbon monoxide (CO), hydrogen sulphide (H₂S) and hydrogen fluoride (HF) are also available.
Cambridge Sensotec has also been carrying out field tests, which have highlighted the requirement for quick and easy to use instruments for onsite SF₆ gas maintenance procedures. Therefore, the Rapidox SF₆ 6100 pump back gas analyser has been developed with an inbuilt microprocessor operated by a 7” colour touchscreen, with the ability to store 12 months of continuous data. Pre-loaded IEC and CIGRE tests are available, alongside the ability to customise test parameters. Housed within a robust IP66 Peli case, the Rapidox is lightweight and features an 8-hour lithium ion battery in addition to an in-built printer, making it a truly portable field instrument.

Due for release in Autumn 2014, the Rapidox SF₆ 6100 pump back gas analyser is to be showcased in October 2014 at the EP China exhibition: http://www.epchinashow.com. For further information regarding gas analysis products, please contact Cambridge Sensotec on +44 (0)1480 462142, or email us at sales@cambridge-sensotec.co.uk.

In response to the requirements of the electricity generation and distribution industries, Cambridge Sensotec is nearing completion of a new and exciting portable SF₆ gas analyser to include a gas return function.

As GIS equipment contains pressurised SF₆ gas, Cambridge Sensotec’s new analyser will allow the user to return the sample to pressurised switchgear. SF₆ gas samples can be extracted from the GIS equipment into the analyser, measured and pumped back. This eliminates the need to refill the GIS and prevents the release of any SF₆ gas into the atmosphere (in accordance with Kyoto greenhouse gas handling legislation).

As part of the product’s development, Cambridge Sensotec is conducting extensive on-site trials to gain technical and practical knowledge. The information gathered has then been fed into the product development process, meaning the completed unit will be designed to meet all of the challenges faced by the user. The site visits included a tour of a typical substation facility and demonstrations by the site staff of the procedures of testing GIS equipment. Cambridge Sensotec’s prototype SF₆ gas analyser was used in conjunction with both new and old GIS equipment to assess the applications requirements in full.

In addition to the analyser’s gas pump back facility, the portable analyser will include high precision gas sensors for measuring SF₆, SO₂ and H₂O, with the option of adding sensors for measuring HF and O2 within the SF₆ gas. The analyser will also feature a 7” touch screen display, pre-loaded IEC and CIGRE tests (custom tests can also be set), an 8 hour lithium ion battery, robust IP66 Peli-case, 12 months continuous data storage and optional DILO DN8 and DN20 fittings.

The launch date of the new SF₆ gas analyser is planned for Autumn 2014.

For information about SF₆ gas analysis, equipment and applications please see our website:
www.sf6.co.uk

For further information regarding any of our gas analysis products, please contact Cambridge Sensotec
on +44 (0)1480 462142, or email us at sales@cambridge-sensotec.co.uk.

Rapidox 6100 SF₆ Multigas Analyser

The Rapidox 6100 is an all new high precision gas analysis instrument, with the ability to measure three or more of the above gases simultaneously. The analyser is also fully portable, allowing for 8 hours of continuous use.

Applications include:

• Control and monitoring of SF₆ gas quality within Gas Insulated Substations (GIS), switchgear and circuit breakers
• SF₆ leakage detection
• Detecting the presence of SO₂, H₂O, HF and O₂ within the SF₆ gas

Features:

• High precision sensors
• Pre-loaded ASTM tests
• 7″ full-colour touch screen
• 8-hour lithium ion battery
• Robust IP66 Peli-case
• Minimum 12 months continuous data storage
• Optional DILO DN8 and DN20 fittings available

Use in conjunction with the Rapidox Gas Recovery Bag to safeguard against SF₆ gas being released into the atmosphere (in accordance with the Kyoto agreement).

The Rapidox SF₆ IR portable gas analyser is the latest high precision instrument designed for controlling and monitoring the quality of SF₆ in Gas Insulated Substations and circuit breakers. The gas analyser will measure SF₆ over the full range in a balance gas. Fitted with an internal battery pack, the Rapidox provides up to eight hours use on a single charge. This allows the user to carry out a full day’s maintenance before returning to base to charge. The unit can be used while charging allowing for continuous operation if necessary. The gas analyser measures SF₆ (0-100%) using an infra-red SF₆ detector. This top of the range infra-red card offers exceptional accuracy and stability when measuring the purity of SF₆ over the full range.

All SF₆ readings can be data logged and just a few minutes are required to get a stable reading, allowing the user to quickly take measurements before moving to the next testing site. Data can also be logged internally at a rate set by the user for later downloading to a PC. Internally logged data is retained even when powered off. The Rapidox has a gas output nozzle allowing all sampled gas to be recovered and recycled, ensuring that no SF₆ gas is released into the atmosphere (in accordance with the Kyoto agreement). Available as a bench style instrument or as a full kit in a transport suitcase, with a range of DILO compatible sampling hoses, couplings and a printer. Rapidox SF₆ Gas Recovery Bags are also available to ensure no gas escapes when using the Rapidox gas analyser.

To request a quote or place your order, please contact our sales team: sales@cambridge-sensotec.co.uk.

Cambridge Sensotec have revised and greatly improved their Rapidox Gas Recovery Bag to meet the harsh demands of the industrial gas recovery sector. Compared to other extremely expensive and cumbersome gas recovery systems, Cambridge Sensotec can offer a simple, cost effective, lightweight and portable alternative to this.

Able to hold up to 80 litres of SF₆ gas at standard pressure, allowing for many hours of testing before the bag needs to be emptied. Once the user has finished or the bag has become full, it can be returned to a recycling facility. The Rapidox Gas Recovery Bag can be useful for field engineers, transporting gas samples, temporary storage and many other applications. The bag is constructed from extremely tough heavy-duty DP472 PU (712028) coated polyamide material and has a safety blow off valve incorporated. A clear pocket on the side for documents and a strong rope-reinforced convenient carry handle is also included.

The Rapidox Gas Recovery Bag is supplied with a DILO compatible self-sealing return valve. This allows the user to add an optional DILO valve with a male Rectus fitting for the recovery of SF6 sample gas as well as many other gases. An optional gas valve fitting can allow the stored gas to be decanted into a permanent storage bottle. The Rapidox Gas Recovery Bag can also work in conjunction with any other gas analysers fitted with the correct valve.

In response to increasing customer demand for a more cost-effective product, we are proud to announce the Rapidox 3100C SF₆ single gas analyser. This mains powered analyser will measure SF₆ gas over the full range (0-100%) using an infra-red SF₆ sensor, which offers exceptional accuracy and stability when measuring purity.
Users can monitor the SF₆ gas, with all analysis data-logged internally at a rate set by the user. This data is then available for download to a PC for analysis. It takes only a few minutes to achieve a stable reading, and as the internally logged data is retained when the analyser is switched off, the recorded data does not need to be downloaded immediately.

The Rapidox 3100C IR SF₆ single gas analyser is fitted with a gas output nozzle that allows all sampled gas to be removed and recycled in accordance with the Kyoto treaty. It can be supplied as a bench style instrument or as a portable kit housed in a hard-wearing case, which includes DILO compatible sampling hoses, couplings and a printer. An SF₆ Gas Recovery Bag is also available at a low cost, to ensure that no gas is lost or leaked into the atmosphere.