The FIREYE MBPF-200S is a single-channel flame sensor module designed to provide clear visual indication and a relay output to signal flame presence in a combustion chamber. It is commonly used as a flame-proving device within a burner management system (BMS) or as a standalone flame presence switch where a simple, dependable “flame present / flame not present” output is needed. The MBPF family is built around flexible sensing: it can work with Fireye optical ultraviolet (UV) scanners, a flame rod, or both (depending on the application and wiring approach).
For plants running process heaters, boilers, ovens, kilns, thermal oxidizers, or packaged burners, flame detection is not a nice-to-have—it’s the last line of defense against unburned fuel accumulation. The MBPF-200S focuses on that specific job: it turns a real flame signal into a readable status (LED indication) and a robust switching output that can be tied into alarms, permissives, interlocks, or higher-level controls. Fireye’s own PF Series description also frames these modules as providing “visual indication and electrical output” and supporting UV scanners and/or flame rods as part of a burner management system.
What the MBPF-200S does in a combustion system
In typical operation, the MBPF-200S receives a flame signal from a compatible UV scanner or flame rod circuit and drives:
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Flame ON LED for fast “at-a-glance” status confirmation during commissioning and troubleshooting.
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A flame relay output (SPDT) that changes state based on flame presence, so you can interface it with control panels and safety logic.
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Analog output test points that allow direct reading of flame signal strength, which is extremely useful when you’re aligning scanner sighting, cleaning lenses, validating flame rod positioning, or chasing down nuisance trips.
It also supports practical field features such as panel or DIN-rail mounting via a standard relay base, plus remote testing of contacts for service workflows.
Important safety positioning (read this like a grown-up)
The MBPF-200S is a flame sensing module, not a complete flame safeguard controller. Fireye explicitly notes that when MBPF modules are used, additional means must be provided for functions normally required by local regulations (safe start check, valve closure, interlocks, safety timing, etc.).
In other words: it’s a strong piece of the safety chain, but it is not the whole chain.
Key Features and Benefits
220 VAC, 50/60 Hz self-contained supply
The MBPF-200S is specified as a 220 VAC module for 50/60 Hz mains operation, with modest current consumption (0.1 A listed for the 220 VAC versions).
Flexible sensing: UV scanner and/or flame rod
It can be applied with UV detection, flame rod, or both, allowing one module family to cover a wide spread of burner designs and fuel types (within proper application limits).
Commissioning-friendly diagnostics
LED indications plus analog test points give technicians immediate feedback when adjusting sensor aiming, checking flame stability, or diagnosing electrical interference.
Industrial mounting and wiring convenience
Designed to work with a standard 11-pin relay base and allowing panel surface or DIN-rail mounting keeps retrofit and panel design straightforward.
FM Approved for industrial environments
Agency approvals list MBPF-200S as Factory Mutual (FM) approved.
Technical Specifications (MBPF-200S)
| Item | Specification / Notes |
|---|---|
| Model | MBPF-200S single channel flame sensor module |
| Supply Voltage | 220 VAC (+10%, -15%), 50/60 Hz, approx. 0.1 A consumption |
| Flame Relay Output | SPDT, 2 A resistive @ 240 VAC; 3 A @ 24 VDC |
| Flame Fail Response Time | 3 seconds (MBPF-200S) |
| Operating Temperature | -40 °C to 60 °C (-40 °F to 140 °F) |
| Storage Temperature | -40 °C to 80 °C (-40 °F to 176 °F) |
| Humidity | 85% RH max, non-condensing |
| Approvals | Factory Mutual (FM) |
| Mounting | Standard 11-pin relay base; panel surface or DIN-rail mounting |
| Diagnostic Indication | Flame ON LED; user controlled Flame Fail LED |
| Test Points | Analog output test points for direct flame signal reading |
| Shipping Weight | 1 lb (0.5 kg) |
| Sensor/Scanner Circuit Notes | UV: terminals 7 & 8 at 460–530 VDC; Flame rod: terminals 9 & 8 at 120–150 VAC (digital VOM) |
| Sensitivity Reference | Flame rod: 3 µA; UV: 50 pW/cm² @ 210 nm; typical V-meter values provided |
Installation Notes That Save Real Money (and headaches)
Combustion environments are electrically noisy: ignition transformers, high-current solenoids, VFDs (inverter drives), and radio-frequency sources can induce false signals. Fireye’s guidance emphasizes routing sensor wiring away from high voltage/current wiring and using shielding practices to reduce interference.
Practical highlights from the installation guidance:
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For longer flame rod runs (around 100 ft / 30 m and beyond), use appropriate coax cable (example provided) and be mindful that shield grounding can trade off between noise immunity and signal strength due to capacitance.
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Sensor wiring can be run up to about 200 ft (61 m) depending on field connections, but must be handled carefully to avoid cross-talk and induced noise.
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Flame rods are recommended only on gas burners, because oil burners can soot the rod and cause nuisance shutdowns or unsafe conditions.
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Use only specified Fireye UV scanner models listed for the module family and follow burner manufacturer mounting guidance for proper sighting.
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Incorrect sensor installation can create false flame signals and allow unburned fuel to accumulate—this is explicitly called out as a serious hazard.
Applications and Where MBPF-200S Fits Best
The MBPF-200S is a strong choice when you need:
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A reliable flame presence relay for process burners and industrial combustion chambers
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A retrofit-friendly module that uses a standard base and common mounting styles
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A commissioning workflow that benefits from local status LEDs and test points for flame signal measurement
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Integration into a larger BMS or interlock structure where the MBPF-200S provides the “flame proven” input while the master safeguard handles timing, permissives, and shutdown sequencing
Ordering and Common Accessories (examples)
The ordering information identifies MBPF-200S as a single channel, 220 VAC 50/60 Hz module for use with UV detection and/or flame rod.
It also references an 11-pin socket base (60-2726) and a retaining kit to secure the module on the socket.
Bottom line
If you need a 220 VAC, FM-approved, single-channel flame sensor module that supports UV scanners and/or flame rod sensing, offers practical diagnostics, and integrates cleanly into burner panels, the FIREYE MBPF-200S is a purpose-built option.
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