Rosemount 975MR multi-spectrum IR3 flame detector, 90 m range
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Quick overview
- Type: Gas & flame detection
- Signal / Protocol: HART, Modbus, RS-485, Relay / switch
- Hazardous area: Hazardous-area rated / option
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1445 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | Rosemount |
| Model | 975MR |
| Technical | |
| Type | Gas & flame detection |
| Signal / Protocol | HART, Modbus, RS-485, Relay / switch |
| Hazardous area | Hazardous-area rated / option |
Datasheet
Technical features
| Option | enhanced hot CO₂ discrimination |
|---|---|
| Heated optics (two modes) for icing and condensation | |
| Continuous infrared built-in test of optics and electronics; field-of-view integrity test | |
| Factory calibrated, plug and play; universal wiring | |
| Internal event log recorder | |
| Configurable by HART or RS-485 Modbus | |
Applications
| Oil and gas onshore/offshore installations and pipelines | |
| Chemical and petrochemical plants, tank farms, fuel and gas processing and storage | |
| Power generation, fertilizer, explosives, battery charging and hydrogen facilities |
Mechanical and environment
| Enclosure | Electropolished stainless steel 316, or copper-free aluminium (polyurethane painted) |
|---|---|
| Dimensions | 100.6 × 117 × 155 mm |
| Weight | 2.9 kg (stainless) / 1.3 kg (aluminium); tilt mount 1.1 kg |
| Operating / storage temperature | −60 to +85 °C |
| Humidity | Up to 100% RH non-condensing |
| Ingress protection | IP66 and IP68 (EN 60529), NEMA 250 6P |
| Environmental | DNV 2-4 |
| Reliability | MTBF 150,000 h; five-year warranty |
Key specifications
| Technology | QuadSense triple IR (IR3) |
|---|---|
| Detects | Hydrocarbon fuel and gas fires |
| Detection range | Gasoline / n-heptane 90 m |
| Field of view | 100° horizontal × 95° vertical |
| Output | Relays, 0–20 mA stepped with HART, RS-485 Modbus |
| Approvals | ATEX/IECEx/UKCA flameproof, FM/CSA explosion-proof, INMETRO, EAC; SIL 3 compatible |
Detection
| Technology | QuadSense triple IR (IR3) |
|---|---|
| Spectral response | Four IR bands between 4 and 5 µm |
| Detection range (highest sensitivity) | Gasoline / n-heptane 90 m; diesel, kerosene 63 m; methane, LPG 63 m (0.1 m² pan fire) |
| Response time | Typically < 2 s at 40 m and 10 s at 90 m; ultra-fast < 1 s at 30 m; explosion 50 ms (LPG sphere at 20 m) |
| Sensitivity | Six ranges |
| Field of view | 100° horizontal × 95° vertical |
| Coverage (gasoline, n-heptane) | 6,336 m² / 446,357 m³ |
| Power consumption | 60 mA (1.4 W) normal; up to 280 mA (7.6 W) with heater and alarm |
| Special | Option: enhanced hot CO₂ discrimination |
Electrical
| Operating voltage | 24 V DC nominal (18 to 32 V DC) |
|---|---|
| Outputs | Alarm, fault and auxiliary SPDT relays, 2 A at 30 V DC; 0–20 mA stepped (fault 0, BIT 2, normal 4, warning 16, alarm 20 mA); analog voltage |
| Communication | HART on the 0–20 mA output; RS-485 Modbus |
| Cable entries | 2 × ¾-14 NPT or 2 × M25 × 1.5 |
| EMC | EN 61000-6-3, EN 50130 |
Certification options
| Hazardous area | ATEX / IECEx / UKCA flameproof; USA and Canada explosion-proof (FM, FMC; CSA for stainless); INMETRO; China flameproof and CCCF; EAC |
|---|---|
| Functional safety | SIL 3 compatible |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of Rosemount, used with permission (source) — background removed by Argonmark. All photo credits
Description
The Rosemount 975MR flame detector uses QuadSense triple IR (IR3) technology to detect hydrocarbon fuel and gas fires. It detects a 0.1 m² gasoline or n-heptane pan fire at up to 90 m at its highest sensitivity, with a field of view of 100° horizontal × 95° vertical, and its response and sensitivity can be adapted to the area through HART or RS-485 Modbus.
It runs on 24 V DC, provides alarm, fault and auxiliary relays plus a stepped 0–20 mA output, operates from −60 to +85 °C with heated optics, is rated IP66/IP68 and carries flameproof and explosion-proof approvals and SIL 3 compatibility.
Argonmark Ltd supplies Rosemount instruments across Bangladesh — Dhaka, Chattogram, Gazipur, Narayanganj and the gas fields, refineries, terminals and power plants beyond. Send us the model, range, process connection, output and any hazardous-area requirement, and we will confirm the right configuration, lead time and price.
Questions & answers
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