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Rosemount
Rosemount 975MR Multi-Spectrum IR Flame Detector
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Rosemount 975MR: IR3 multi-spectrum; to ~300 ft; <50 ms; HART/Modbus. RFQ.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Output
Relay outputs; 0–20 mA; HART; RS-485 Modbus
Approvals
FM; ATEX; IECEx; SIL; Declaration of Performance for 975MR
Detection Type
Multi-spectrum triple-IR (IR3) flame detector for hydrocarbon gas and liquid fires
Detection Range
Up to 300 ft (90 m) depending on fuel and sensitivity
Response Time
High-speed response under 50 ms for LPG-air explosions (per Emerson PDS)
Field Of View
100° horizontal / 95° vertical typical
Fits hydrocarbon flame detection at longer range where you need a Rosemount 975MR. This multi-spectrum triple-IR (IR3) detector covers gas and liquid hydrocarbon fires up to about 300 ft (90 m), with response under 50 ms for LPG-air explosion class events, plus relay / 0–20 mA / HART / Modbus outputs.
Key advantages
- Type — Multi-spectrum triple-IR (IR3)
- Range — Up to about 300 ft (90 m) by fuel/sensitivity
- Response — Under 50 ms class
- FOV — About 100° H / 95° V typical
- Outputs — Relays; 0–20 mA; HART; RS-485 Modbus
Typical applications
- Oil & gas facilities.
- Tank farms.
- Compressor / process units.
Selection guide
- Sensitivity
- Heated optics
- Output set
Common mistakes
- FOV obstruction.
- Wrong fuel table assumption.
- Skipping BIT checks.
When to RFQ / what to tell us
- Options/outputs.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 43516 |
| Brand | Rosemount |
| Model | 975MR Flame Detector |
| Product type | Flame Detector |
| Detection type | Multi-spectrum triple-IR (IR3) flame detector for hydrocarbon gas and liquid fires |
| Detection range | Up to 300 ft (90 m) depending on fuel and sensitivity |
| Response time | High-speed response under 50 ms for LPG-air explosions (per Emerson PDS) |
| Field of view | 100° horizontal / 95° vertical typical |
| Spectral bands | Four IR bands in the 4–5 µm region |
| Output signal | Relay outputs; 0–20 mA; HART; RS-485 Modbus |
| Operating temperature | −60 to +85 °C (−76 to +185 °F) |
| Comms | HART and RS-485 Modbus configuration / diagnostics |
Documents
FAQ
Q: Max range class? A: Up to about 300 ft (90 m).
Q: FOV? A: About 100° H / 95° V typical.
Q: What should I send for a quote? A: Options/outputs, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Output | Relay outputs; 0–20 mA; HART; RS-485 Modbus |
| Approvals | FM; ATEX; IECEx; SIL; Declaration of Performance for 975MR |
| Detection Type | Multi-spectrum triple-IR (IR3) flame detector for hydrocarbon gas and liquid fires |
| Detection Range | Up to 300 ft (90 m) depending on fuel and sensitivity |
| Response Time | High-speed response under 50 ms for LPG-air explosions (per Emerson PDS) |
| Field Of View | 100° horizontal / 95° vertical typical |
| Spectral Bands | Four IR bands in the 4–5 µm region |
| Sensitivity Levels | Six user-selectable sensitivity levels |
| Operating Temperature | −60 to +85 °C (−76 to +185 °F) |
| Enclosure | Stainless steel / aluminum explosion-proof / weatherproof housing per PDS |
| Comms | HART and RS-485 Modbus configuration / diagnostics |
| Special Features | Heated optics options; built-in test; immunity to false alarms from sunlight/welding |
| Form Factor | Fixed multi-spectrum IR flame detector for oil & gas, tank farms, compressor stations |
| Family | Rosemount 975 flame detector family (975MR multi-spectrum IR variant) |