• Sulfur hexafluoride detector-transmitter E2638-SF6 is a member of PluraSens® family of multifunctional measurement instruments.

• E2638-SF6 Gas Detector is specifically designed to monitor and early warning against SF6 leakage at power plants , transformers in high voltage engineering .

  The instrument utilises a fully calibrated and temperature compensated optical NDIR gas sensor with excellent repeatability, stability and long lifetime.

  Two relays with closing contact (optional) may be used for remote signalling or concentration control. Two alarm set-points are user settable.

  Two analog outputs and RS485 digital interface with industry standard Modbus RTU protocol can be used to connect the detector to safety or building automation systems.

• General Feature
• Stable long-life optical NDIR sensor
• Range 0...1000 or 2000 ppm SF₆
• Resolution 2 ppm or 4 ppm SF₆
• Two SPST relays (option)
• 2 × 4-20 mA or 0-10 V, RS485

Although sulphur hexafluoride is non-toxic and non-flammable, its global warming potential is about 24,000 times higher than carbon dioxide (GWP=23,900). That makes it the most potent of all greenhouse gases, which is why its use is subject to the most stringent environmental regulations. In addition, sulphur hexafluoride is odourless and heavier than air, so that it can accumulate in case of SF₆ leaks in low-lying areas of the gas-insulated switchgear. Without reliable SF₆ monitoring with SF₆ gas sensors there would be a danger of asphyxiation for the workers.