Why SF6 is particularly relevant today?

Sulphur hexafluoride (SF6) has been an integral part of modern medium and high-voltage technology for decades. As an insulating and extinguishing gas, it enables compact, powerful and reliable switchgear. At the same time, the handling of SF6 is increasingly becoming the focus of legislation, regulatory authorities and the public.

The reason for this is that SF6 gas is one of the most climate-impacting greenhouse gases and remains in the atmosphere for long periods of time. We are talking about 1 kg of SF6 being equivalent to 24,000 kg of CO2. This means that SF6 is approximately 24,000 times more harmful than CO2.

Operators and service companies are therefore now faced with the challenge of reconciling the technical benefits of SF6 with increasing environmental and climate protection requirements.

A key issue here is the early detection and assessment of SF6 leaks. After all, only those who address emissions can effectively reduce them.

Our solution for detecting the smallest SF6 leaks: HUNTER SF6

The HUNTER SF6 is a professional gas detection and gas measuring device, that enables the detection of even the smallest SF6 leaks in the ppm range directly on pipeline and system components.

Thanks to point-of-measurement technology, leaks can be accurately located and directly assessed. This creates a reliable basis for all further steps, from documentation to targeted repairs.

The HUNTER SF6 is a SF6 leak detector that provides reliable measurement data, thereby supplementing the user’s assessment.

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HUNTER SF6 typical applications

The SF6 sniffer HUNTER SF6 is used wherever components containing SF6 need to be checked regularly, for example:

  • when detecting leaks in medium and high-voltage switchgear
  • on GIS and GIL systems
  • when inspecting switch panels, measuring transformers and cable terminations
  • as part of recurring tests and maintenance concepts

Nowadays, modern leak detection must do more than simply locate a leak. In practice, four aspects are particularly important:

  • Precise localisation directly at the plant
  • Rapid on-site assessment without lengthy evaluation processes
  • Work during ongoing operations to avoid downtime and save costs
  • Verifiable measurement results as a basis for decisions

Our proven HUNTER platform

For existing customers, the HUNTER SF6 is part of an already established measurement and documentation solution. As a member of the proven HUNTER device platform, it integrates seamlessly into existing work processes.

Measurement values can be recorded in a structured manner and processed digitally. The HUNTER SF6 therefore not only supports technical leak detection, but also meets requirements for traceability, documentation and internal quality assurance.

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Request a 15-minute expert presentation (online or on-site)

We will give you a compact live presentation (online or on site) lasting around 15 minutes to show you how the HUNTER SF6 works in practice. Simply fill out the form and request an appointment.

SF6 leaks: small, invisible, but with serious consequences

In practice, SF6 leaks are rarely particularly noticeable. They often develop gradually, in places such as seals, flanges, valves or cable end caps. They are often neither visible nor audible and remain undetected for a long time.

And that is where the risk lies: even small, permanent leaks lead to significant emissions over time. At the same time, uncertainty about the actual condition of the system grows. Without reliable measurements, it is difficult to define the need for action.

For operators, this means additional testing effort and increasing documentation requirements.

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SF6 legal requirements: What you need to know

The current F-Gas Regulation (EU) 2024/573 further tightens the requirements for handling fluorinated gases. In addition to restrictions on the use of new systems, the focus is now particularly on existing systems:

  • regular leak checks
  • traceable documentation of tests and measures
  • qualified personnel and suitable measurement methods
  • increasing importance of recuperation and reuse

Measurements are thus becoming an integral part of modern maintenance and servicing concepts.

HUNTER SF6
HUNTER SF6
The HUNTER SF6 is a gas detection and measurement device for the reliable detection of even the smallest SF6 leaks in pipeline and system components. By directly detecting sulphur hexafluoride in the ppm range, the device enables the precise localisation of leaks – even during ongoing operation. The HUNTER SF6 thus helps to detect emissions at an early stage, minimise risks to operations and the environment, and implement testing and maintenance measures in a well-founded and traceable manner. Based on our proven Hunter platform, the combination of highly sensitive sensor technology, fast response time and active sampling ensures efficient measurement processes directly at the plant. The robust, compact design makes the HUNTER SF6 the ideal companion for mobile use in demanding environments. Advantages: - highly sensitive sensor for SF6 with resolution in the ppm range - fast response time even with the smallest traces of gas - integrated pump with high flow rate for precise sampling - robust, handy housing – ideal for mobile use - long operating time of up to 10 hours thanks to powerful battery Measuring range: 0 to 10 ppm with 0.1 ppm resolution SF₆ 10 to 1000 ppm with 1 ppm resolution SF₆ Temperature range: -10°C to 50°C Dimensions: approx. 200 × 100 × 87 mm Weight: approx. 1100 g

Quick Info: What is SF6?

Sulphur hexafluoride (SF6) is a man-made insulating gas that’s become a go-to in medium- and high-voltage electrical equipment. Thanks to its fantastic dielectric and arc-quenching abilities, SF6 helps create compact, dependable, and high-performing switchgear and gas-insulated systems.

Its remarkable physical and chemical stability has established SF6 as a trusted choice in power transmission and distribution for many years, especially where long-lasting service and operational reliability are crucial.

Key properties of SF6 gas:
  • Excellent insulating properties, even when dealing with high voltage levels.
  • Highly effective arc-quenching capability, which significantly enhances operational safety.
  • Colourless, odourless, and non-flammable under normal conditions, making it quite user-friendly.
  • Chemically and thermally stable, ensuring a long service life.
  • High gas density, it allows for a compact design of equipment.
  • Perfect for sealed electrical systems that require minimal maintenance.