Starting at $1,670.31
  • Usually ships in 20 weeks



  • SMART sensor technology
  • Transmitter automatically recognizes sensors configuration
  • Lowest power consumption available
  • Long range (2000ft) sensor separation
  • 5 year sensor warranty
  • Field selectable gas curves available
  • Immune to poisoning
  • Accuracy:
    • ±2% less than 50%
    • ±5% greater than 50%
  • Designed to perform in the most extreme industrial environments


The Net Safety SC311 Infrared Combustible Gas Sensor delivers the latest technology advancements in infrared sensing of flammable gases in a rugged package designed for the most extreme industrial environments. Hydrocarbon gas LEL detection is fast, reliable and highly accurate with only periodic bump testing recommended and a simple annual calibration sequence. A full 5 year warranty is included with a typical sensor life of 8-10 years.

There's no longer the need to purchase multiple gas specific detectors. You have the option to utilize 1 or 2 toxic and/or combustible gas sensors on a single Millennium II transmitter and easily mix and match any of our sensor technologies.

SMART (Self Monitoring Analysis and Reporting Technology) sensors are pre-calibrated and easily connected to the transmitter which instantly recognizes a newly fitted sensor, automatically uploading it's specific configuration profile.

Sensor and transmitter continuously communicate digitally, giving you the confidence of stable, accurate protection with fast response times even over long separation distances.

The SC3 Series has been approved to international hazardous area safety standards for functional operation and performance.

High resolution, dual-beam optics are employed in the sensor design which eliminates reflective surfaces preventing fouling, fogging or misalignment. Not only does this provide enhanced overall performance but it also means low power consumption which equals cost savings and more reliable coverage.

Continuous self-check for several performance parameters as well as environmental compensation for temperature, pressure and humidity maintains a high level of sensor performance and reliability.