The Rosemount 935 Open Path Combustible Gas Detector provides continuous monitoring for hydrocarbon gases, even in harsh environments where dust, fog, rain, snow or vibration can cause high amounts of obscuration. This combustible gas detector utilizes infrared technology and has long range detection up to 660 ft (200 m). Worldwide approvals for the Rosemount 935 Open Path Combustible Gas Detector include ATEX, IECEx, FM/FMC, INMETRO, TR CU, and SIL 2 (TÜV).

Features

• Accurate, high speed response time (< 3 seconds)
• High immunity to false alarms
• Heated optics for use in extreme environments
• Built-in data logger (records up to 100 events)
• Real time diagnostics
• Reduced cross sensitivity
• Factory calibrated gas settings for greater accuracy

Specifications

Time Constant / Response

T90≤ 3 Seconds

Sensitivity Range

0-5 LEL.m methane and propane

0-8 LEL.m ethylene

Spectral Response

2.0 - 3.0μm

Temperature Range

-67 °F to +149 °F (-55 °C to +65 °C)

Humidity Range

Up to 95% Non-Condensing (Withstands up to 100% RH for Short Periods)

False Alarm Immunity

Not Influenced by Solar Radiation, Hydrocarbon Flames and Other External IR Radiation Sources

Power Supply

24 VDC Nominal (18-32 VDC)

Heated Optics

To Eliminate Condensation and Icing on the Window

Warranty

3 Years

Drift

±7.5% of the reading or ±4% of the full scale (whichever is greater)

Displacement/Misalignment

±0.5°

Detected Gas

Most hydrocarbon gases

Housing Material

316L Stainless Steel Housing

Dimensions

Detector / Source 10.5" x 5.1" x 5.1" (267 x 130 x 130mm)

Weight

Detector / Source 11lb (5kg)