Combistible Gas Detector

The 5100-02-IT Combustible Gas Sensor Module is a key member of the powerful Sierra Monitor IT Series family of gas sensor modules. The 5100-02-IT provides the features needed by safety and instrumentation engineers including:

sierra moitor combistible gas detector

  • 180-day calibration interval
  • FM and UL Approval for performance & safety
  • SIL-2 certified
  • Modbus RTU RS-485 interface
  • 4-20 mA output isolated and non-isolated
  • HART Interface option
  • SMC Sentry digital bus interface
  • ATEX Certified
  • Optional alarm relays - Alarm, Warning, Trouble
  • Aluminum or 316 Stainless Steel enclosure
  • Non-intrusive calibration
  • Integral scrolling LED display
  • Optional remote sensor
  • Remote alarm reset capable


  • Six-month calibration interval
  • Non-intrusive calibration/li>
  • Network-compatible with Modbus, 4-20 mA, Sentry bus, HART and relay interface
  • FM and UL Approved for Performance and Hazardous Areas
  • SIL-2 Certified
  • Local scrolling display


  • Longest rated and FM-approved calibration cycle for any catalytic-bead gas detector - reduced maintenance
  • Able to calibrate module without declassifying the area
  • Easily meets user’s needs for access to critical plant safety information
  • Proven and approved for installation in areas where combustible gases are located
  • Meets long term reliability design standards
  • Ease of calibration and easy access to gas concentration, relay status and diagnostics