Rosemount Analytical 975MR2A6S1E2

The 975MR2A6S1E2 is a Rosemount 975MR multi-spectrum infrared flame detector from Emerson, designed for hydrocarbon flame detection. This 975MR uses four independent IR sensors to identify liquid and gas hydrocarbon fires, delivering strong false alarm immunity against sunlight, lightning and hot background radiation. The suffix string 2A6S1E2 defines enclosure material, output type, communication, certification, lens and electrical connection configuration for this specific variant.

This 975MR2A6S1E2 operates on 24VDC supply, with detection distance up to 90 m for a 0.1 m² gasoline pan fire, response time below 50 ms. It supports 4-20mA / HART, RS485 Modbus and relay alarm/fault contacts. The housing is 316 stainless steel, rated IP66/IP68 and NEMA 6P, with ATEX, IECEx, FM hazardous area approvals. Built-in continuous optical self-test monitors lens contamination and internal sensor health. Heated lens option is available to prevent condensation and icing in cold offshore environments.

The 975MR2A6S1E2 is widely deployed in refineries, oil & gas tank farms, compressor stations, chemical plants and gas turbine enclosures for fire safety systems. The 975MR series is Emerson’s current mainstream multi-IR flame detector platform. Many EPC and safety maintenance teams stock the 975MR2A6S1E2 as spare detector for flame detection system overhaul and emergency replacement.