Fireye 45RM4 Series Flame Scanners

Technical Dossier

Product Details And Specifications

Fireye 45RM4 Series: Comprehensive Module Range and Technical Overview

The Fireye 45RM4 Series represents a mature line of self-checking ultraviolet (UV) and infrared (IR) flame scanners engineered for continuous duty in heavy industrial combustion systems. Deployed across petrochemical refineries, coal-fired power stations, chemical processing plants, and nuclear facility auxiliary boiler rooms, the 45RM4 platform has accumulated decades of field installation across North America, Europe, and Asia-Pacific. Its modular architecture — separating the scanner head from the amplifier/relay base — allows targeted component replacement without full system shutdown, a critical operational advantage in facilities where burner management system (BMS) uptime is non-negotiable. The series interfaces directly with Fireye's EP260, EP270, and EP460 burner management controllers, as well as third-party BMS platforms via relay output signals. Its self-checking circuitry meets NFPA 85, EN 298, and IEC 61511 functional safety requirements, making it a reference-grade component in safety instrumented systems (SIS) for fired equipment.

The Evolution of 45RM4 Architecture

The 45RM4 series descends from Fireye's earlier 45RM and 45RM2 scanner families, which established the modular head-plus-base topology in the 1980s. The 45RM4 generation introduced enhanced self-checking intervals, improved UV tube longevity, and broader spectral sensitivity options to accommodate natural gas, oil, and combination fuel burners. Key architectural milestones include:

Early 45RM / 45RM2 era (pre-1990): Fixed UV detection, single-relay output, no self-check diagnostics. Compatible with legacy Fireye D Series and E Series amplifiers.

45RM4 introduction (early 1990s): Self-checking UV circuitry added. Modular base redesigned for DIN-rail and panel-mount compatibility. Relay output expanded to include flame-on, fault, and self-check status.

45RM4 mature phase (2000s–2010s): Extended UV tube ratings, optional IR-sensitive variants (45RM4-1004, 45RM4-1007) introduced for heavy oil and coal applications. Integration tested with Siemens LMV, Honeywell 7800 series, and Yokogawa CENTUM VP BMS platforms.

Current lifecycle status: The 45RM4 series is in the mature-to-end-of-life phase. Fireye (now part of UTC Fire & Security / Carrier Global) has transitioned new project specifications toward the 45RM5 and 60RM series. However, the installed base of 45RM4 units in operating plants remains substantial, and replacement demand for maintenance and turnaround projects continues. DriveKNMS maintains stock of both new-surplus and reconditioned 45RM4 components to support long-term plant maintenance contracts.

45RM4 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified 45RM4 series product range. Each unit is a discrete field-replaceable component within the Fireye modular flame detection system.

45RM4-1001: Self-checking UV scanner head, standard sensitivity, 3/4 in. NPT mount, 120 VAC.
45RM4-1002: Self-checking UV scanner head, high-sensitivity UV tube, 3/4 in. NPT, 120 VAC.
45RM4-1003: UV scanner head, extended-range UV detection, 1 in. NPT mount, 120 VAC.
45RM4-1004: Self-checking IR (infrared) scanner head, 1 µm wavelength, 3/4 in. NPT, 120 VAC.
45RM4-1005: UV/IR combination scanner head, dual-spectrum detection, 3/4 in. NPT, 120 VAC.
45RM4-1006: UV scanner head, 240 VAC supply voltage variant, 3/4 in. NPT mount.
45RM4-1007: IR scanner head, 2 µm wavelength, optimized for heavy oil and coal flame detection.
45RM4-1008: UV scanner head, stainless steel housing, high-temperature ambient rating up to 125°C.
45RM4-1009: UV scanner head with integral cooling air purge fitting, 3/4 in. NPT.
45RM4-1010: Self-checking UV scanner, ATEX/IECEx certified, Zone 1 hazardous area rated.
45RM4-1011: UV scanner head, CSA/UL certified variant for North American hazardous locations.
45RM4-1012: Replacement UV detector tube assembly for 45RM4-1001 and 45RM4-1002 heads.
45RM4-1013: Replacement IR detector cell assembly for 45RM4-1004 and 45RM4-1007 heads.
45RM4-1014: Amplifier/relay base unit, DIN-rail mount, compatible with all 45RM4 scanner heads.
45RM4-1015: Amplifier/relay base unit, panel-mount version, SPDT relay output, 120/240 VAC.
45RM4-1016: Interconnecting cable assembly, 10 ft, scanner head to amplifier base.
45RM4-1017: Interconnecting cable assembly, 25 ft, scanner head to amplifier base.
45RM4-1018: Sight pipe adapter kit, 1 in. NPT, stainless steel, for 45RM4 series heads.
45RM4-1019: Cooling air purge assembly, complete kit, for high-temperature furnace applications.

Sourcing Hard-to-Find & Obsolete 45RM4 Parts

As the 45RM4 series transitions out of active OEM production, procurement teams at refineries, power utilities, and chemical plants face increasing lead times and minimum order quantity constraints from authorized distribution channels. DriveKNMS operates as a specialized industrial automation parts distributor with a dedicated inventory program for end-of-life Fireye components.

Our 45RM4 sourcing capabilities include: new-surplus stock acquired from plant decommissioning projects and OEM overstock liquidations; factory-reconditioned units with full functional restoration to original specification; cross-reference matching to identify compatible 45RM5 or 60RM series substitutes where direct replacement is not available; and emergency same-day dispatch for critical plant outage situations. All 45RM4 inventory is stored in climate-controlled warehousing with ESD-safe handling protocols. Traceability documentation — including country of origin, date codes, and test records — is provided with every shipment.

Quality Control for the 45RM4 Range

The 45RM4 scanner head and amplifier base are interdependent subsystems; functional verification requires testing both components as a matched pair under simulated flame and no-flame conditions. DriveKNMS applies the following test protocol to all 45RM4 units processed through its reconditioning program:

UV tube emission test: Each UV detector tube is tested for photocurrent output against a calibrated UV source at the specified wavelength band. Tubes producing less than 85% of nominal photocurrent are rejected.

Self-check cycle verification: The scanner's internal self-check shutter mechanism is cycled a minimum of 500 times under powered conditions. Timing of the self-check interval is measured against the published specification (typically 1.0–1.5 seconds).

Relay output integrity test: Flame-on relay, fault relay, and self-check relay contacts are tested for contact resistance (<100 mΩ), dielectric withstand (500 VAC for 1 minute), and correct logic sequencing under simulated flame-present and flame-absent conditions.

Amplifier base calibration: Sensitivity potentiometer range and linearity are verified. Flame signal strength output (4–20 mA where applicable) is calibrated against reference input.

High-temperature soak test: Units intended for high-ambient applications are subjected to a 4-hour thermal soak at 85°C prior to final functional test.

All test data is recorded and retained for a minimum of 5 years. Test certificates are available upon request for units supplied to nuclear, offshore, or SIL-rated applications.