E2638 Sulfur Hexafluoride SF6 Transmitter


  • 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

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

Applications include SF6 leakage control at power plants.

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.

Technical Data
Calibration sulfur hexafluoride SF6
Sensor type optical NDIR
Sampling method diffusion
Detection range 0…1000 ppm SF6
0…2000 ppm SF6
Resolution 2 ppm SF6 for 1000 ppm range
4 ppm SF6 for 2000 ppm range
Sensor lifetime ≥ 5 years
Power supply 12…36 VDC (default),
24 VAC or 230 VAC as options
Digital interface RS485, Modbus RTU protocol
Analog outputs 2 × 4-20 mA / 0-10 V, user settable
Output relays (option) 2 × SPST relays (closing contact),
Enclosure grey ABS plastic, wall mount, IP65
Dimensions H90 × W145 × D55 mm
Operating conditions -20…+50 °C, 15…95 %RH

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