Starting at $8,203.74
  • Usually ships in 14-16 weeks



  • Sensitivity Range:
    • 0-5 LEL.m methane and propane
    • 0-8 LEL.m ethylene
  • 2.0 to 3.0μm spectral response
  • ≤3 second response time
  • ±0.5° alignment tolerance
  • User programmable via HART or RS-485 Modbus protocols
  • Built-in event recorder (real time record of the last 256 events)
  • Built-in data logger (records up to 256 events)
  • 24VDC nominal (18-32VDC) power supply
  • Heated Optics to eliminate condensation and icing
  • 316L stainless steel housing
  • Not Influenced by solar radiation, hydrocarbon flames and other IR radiation sources
  • 3 year warranty
Note: Transmitter and receiver both must be ordered as separate parts


The Rosemount Analytical 935 gas detector provides continuous monitoring for combustible hydrocarbon gases in harsh environments where dust, fog, rain, snow or vibration can cause obstruction. This device utilizes infrared technology with a range detection of up to 660ft (200m) depending on your configuration. Worldwide approvals/certifications for the Rosemount 935 include ATEX, IECEx, FM/FMC, INMETRO, TR CU, and SIL 2 (TÜV).


  • Offshore platforms and floating production storage and offloading (FPSOs)
  • Petrochemical plants
  • Chemical processing plants
  • Gas filling and distribution terminals
  • Gas transport and pipelines