Rosemount™ 935 Open Path Combustible Gas Detector

Rosemount

Rosemount™ 935 Open Path Combustible Gas Detector

Rosemount

The Rosemount 935 open path detector provides continuous monitoring for combustible hydrocarbon gases utilizing infrared technology, even in harsh environments where dust, fog, rain, snow or vibration can cause a high reduction of signal.

Specifications

Detection Range
7 - 20 m (23-66 ft), 15-40 m (50 - 132 ft.), 35 - 100 m (115 - 330 ft), 80 - 200 m (265 - 660 ft)
Minimal Detectable Level
0.15 LEL.m
Detected Gas
C1 - C8
Time Constant / Response
3 sec
False Alarm Immunity
Not influenced by solar radiation, hydrocarbon flames and other external infrared radiation sources
Sensitivity Range
0-5 LEL.m methane and propane; 0-8 LEL ethylene
Spectral Response
2.0-3.0 µm
Displacement/Misalignment
±0.5 °
Drift
±7.5 % of the reading or ±4 % of the full scale (whichever is greater)
Temperature Range
-55 °C to 65 °C (-67 °F to 149 °F)
Humidity Range
Up to 95 % non-condensing (withstands up to 100 % relative humidity (RH) for short periods)
Heated Optics
To eliminate condensation and icing on the window
Certifications/Approvals
ATEX, IECEx, FM/FMC, GOST R, INMETRO, CU TR, SIL 2 (TUV), FM 6325, EN60079
Warranty
Safety system: 3 years
Flash source bulb: 10 years

Features

  • Wider area coverage
  • Most likely method to pick up any leak
  • High response speed
  • No unrevealed failure modes
  • Beam block warning
  • Size of gas hazard indicator

Documents & Drawings

Training & Services