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Rosemount 936 Open Path Toxic

The Rosemount 936 Open Path Toxic Gas Detector provides continuous monitoring for hydrogen sulfide (H2S) gas or ammonia (NH3) gas, even in harsh environments where dust, fog, rain, snow or vibration can cause a high reduction of signal. This device utilizes ultraviolet technology and has long range detection up to 200 ft (60 m). Worldwide approvals for the Rosemount 936 include ATEX, IECEx, FM/FMC, INMETRO, TR CU, and SIL 2 (TÜV).

Open path detection system providing continuous monitoring for toxic gases.  Detects toxic hydrogen sulfide or ammonia gas.


  • 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

Available: BC, AB, SK

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Rosemount_product-data-sheet-rosemount-936-open-path-toxic-gas-detectors-en-042022_Westech - Copy.pdf

Emerson Net Safety-FGD-BRO-Safety-Monitoring_Westech_Sept_10_2020.pdf

Manufacturer info

Emerson has boldly transformed itself to create value for our customers and shareholders. With our newly energized focus on our two core business platforms — Automation Solutions and Commercial & Residential Solutions — we can confront the challenges of an increasingly complex and unpredictable marketplace from a position of strength. This allows us to drive both near- and long-term value. And retain our single-trusted-partner status with the process, industrial, commercial and residential industries.