Rosemount 975HR Multi-Spectrum Infrared Hydrogen Flame Detector

Rosemount1 configuration

Configure Your Rosemount 975HR High-Sensitivity Multi-Spectrum IR Flame Detector

High-sensitivity multi-spectrum IR flame detector — extended detection range for hydrogen (up to 165 ft) and hydrocarbon (up to 295 ft) fires. Builds on 975MR three-sensor algorithm with refined hydrogen-fire response. Best for hydrogen-handling, refinery, petrochemical, and offshore applications where rapid hydrogen detection is critical.

Required Specifications

3 of 3 selected

Output Configuration*

Housing*

Product Certification*

Maximum Ambient Temperature

Tilt Mount

Rain Cover

Rosemount 975HR High-Sensitivity Multi-Spectrum IR Flame Detector Part Number

975HR4U6AA1

Configured list price:$6,670.17(estimate based on May 2026 Rosemount list; quote may reflect distributor pricing)

Configuration Summary — Rosemount 975HR High-Sensitivity Multi-Spectrum IR Flame Detector

Base: $6,670.17

Output Configuration:: 4UUniversal Wiring
Housing:: 6AAluminum housing with two 3/4"-14 NPT conduits
Product Certification:: A1ATEX and IECEx Flameproof

Rosemount is configurator-heavy and quote-only — Valley Instrument verifies option compatibility, lead time, and pricing before confirming your order.

Pre-configured Options(1)

Rosemount

975HR Multi-Spectrum Infrared Hydrogen Flame Detector

Multi-spectrum IR flame detector specifically designed to detect both hydrocarbon AND hydrogen flames — hydrogen flames are nearly invisible and emit primarily in the UV (poor for IR-only detectors), so most IR detectors miss them. The 975HR's specialized IR sensor mix catches hydrogen-flame radiation that the 975MR misses. Critical for hydrogen-production plants, refineries with hydrogen reformers, fuel-cell manufacturing, and any process where hydrogen is present alongside hydrocarbons. SIL 2 prior-use FMEDA.

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