Fireye 48PT2-1007 4 ft Infrared Flame Scanner

Description

Product Introduction

The Fireye 48PT2-1007 is a lead-sulfide infrared flame scanner designed for burner-management and flame-safeguard systems. It uses a straight-head configuration with a 4-foot cable and 1/2-inch NPT mounting connection. Fireye documentation identifies the 48PT2 family for flame-monitoring applications on industrial and commercial combustion equipment.

The scanner responds to low-frequency IR radiation rather than visible light. That distinction matters. It is intended to work with compatible Fireye flame-monitoring controls and is commonly specified for gas, oil, and coal-fired burner applications.

Key Technical Specifications

The 4-263-1 Firetron sensor cell is replaceable, which is useful for maintenance because a weak detector does not necessarily mean the entire scanner assembly is beyond service. Fireye’s service documentation also shows the 48PT2-1007 in a weatherproofing arrangement using the supplied 35-69 heat insulator.

One thing to watch: the scanner receives its operating power from the compatible flame-control system. Do not treat the published approximately 7 VDC figure as permission to connect the scanner directly to an arbitrary DC supply. Verify the controller and wiring arrangement first.

48PT2-1007

48PT2-1007

Application Scenarios & The “Trench” Experience

A burner trips during startup. The ignition sequence looks normal, fuel pressure is acceptable, and the flame is visibly present through the sight glass. Yet the burner controller reports flame failure.

That is when technicians often start replacing perfectly good components.

The scanner is looking at the flame through an optical path. Dirty sight glass, incorrect scanner alignment, excessive background radiation, wiring faults, and a deteriorated detector cell can all produce misleading symptoms. The scanner itself is only one part of the flame-supervision loop.

• Boiler Systems — Burner Flame Monitoring — Detects IR radiation from gas-, oil-, or coal-fired flames and sends the flame signal to the compatible Fireye controller.
• Industrial Furnaces — Combustion Safety — Provides continuous flame supervision where loss of flame must cause the burner-management system to respond.
• Commercial Heating — Burner Management — Works with compatible Fireye Flame-Monitor, MicroM, and BurnerLogix equipment.
• Process Heating — Flame Failure Detection — Provides an IR-based flame signal where the burner arrangement is compatible with the 48PT2 optical characteristics.
• Legacy Combustion Systems — Scanner Replacement — Useful when maintaining existing Fireye control hardware without changing the entire burner-management architecture.

Field case — plausible replacement scenario:
A plant boiler begins locking out intermittently during firing. Operators report that the flame is visibly stable. The maintenance team initially suspects the programmer.

The technician checks the flame scanner circuit instead.

The 48PT2-1007 sight path is contaminated, and the scanner’s response has become marginal. After cleaning the optical path and checking the scanner alignment, the technician confirms the detector output is still unstable. A replacement scanner is installed, followed by a controlled burner sequence and flame-signal verification.

The boiler returns to normal operation.

The lesson is straightforward: never troubleshoot a flame scanner by looking only at the scanner. Check the sight path, burner geometry, wiring, controller input, and flame signal together.

Transparency SOP: Quality Assurance & Testing

A flame scanner requires optical and electrical testing. A simple continuity check is not enough.

1. Inbound Inspection
   • Verify Fireye 48PT2-1007 identification.
   • Inspect the straight scanner head, cable, connector, and 1/2-inch NPT mounting interface.
   • Check the optical window for scratches, contamination, or impact damage.
   • Inspect the cable jacket for heat damage.
2. Live Rig Testing
   • Test with a compatible Fireye flame-monitoring control.
   • Verify scanner power from the controller.
   • Establish a known flame source under controlled test conditions.
   • Confirm that the controller recognizes the expected flame signal.
3. Electrical Parameter Checks
   • Check cable continuity and insulation condition.
   • Verify supply voltage from the intended Fireye controller.
   • Check for intermittent connections caused by damaged cable or terminals.
   • Do not apply arbitrary external voltage to the scanner.
4. Sensor Verification
   • Check the response of the IR detector against a controlled flame source.
   • Inspect the 4-263-1 Firetron cell where applicable.
   • Confirm that the scanner does not produce an erroneous flame signal with the intended test conditions.
5. Final QC & Packaging
   • Photograph the actual scanner and nameplate.
   • Protect the optical end from contamination and impact.
   • Package the cable so it is not sharply bent.
   • Record the test controller and test result.

We don’t just ship boxes. A flame scanner should be tested as part of the flame-detection circuit, because continuity alone tells you almost nothing about whether it can reliably see the burner flame.

The Veteran’s Tech Trap Guide (Crucial Value-Add)

• ⚠️ Clean the sight glass before condemning the scanner. Soot, ash, oil deposits, and combustion products can attenuate the IR signal. The scanner may be perfectly healthy.
• ❗ Check the scanner alignment. A straight-head 48PT2 must have the correct line of sight into the flame zone. Seeing some flame is not necessarily enough for reliable flame discrimination.
• ⚠️ Do not substitute the 48PT2-9007 blindly. The 48PT2-9007 uses a 90-degree head, while 48PT2-1007 is straight-head. The mechanical viewing geometry is different.
• ❗ Check the Firetron cell. The 48PT2 uses a replaceable 4-263-1 detector cell. If the scanner becomes insensitive, investigate the cell before replacing unrelated burner-control hardware.

Frequently Asked Questions (FAQ for Conversion)

Q1. What is Fireye 48PT2-1007?
It is a lead-sulfide infrared flame scanner with a straight head and 4-foot cable, intended for compatible Fireye burner-management systems.

Q2. What type of flame does it detect?
The 48PT2 detects low-frequency infrared radiation from flames. Fireye references identify it for gas, oil, and coal-fired burner applications.

Q3. What is the difference between 48PT2-1007 and 48PT2-9007?
The 48PT2-1007 is straight-head, while the 48PT2-9007 has a 90-degree head. Both belong to the 48PT2 IR scanner family, but their mounting/viewing geometry is different.

Q4. Which Fireye controllers can use 48PT2-1007?
Available product documentation lists compatibility with BurnerLogix, E-Series, MicroM, D-Series, Flame-Monitor, and FlameWorx systems. Confirm the exact programmer/amplifier configuration before installation.

Q5. Does the scanner have a replaceable sensor?
Yes. The 48PT2 family uses the 4-263-1 Firetron sensor cell, which is listed as a replacement part.

Q6. Is 48PT2-1007 hot-swappable?
No. Treat it as a burner-safety component. Place the burner-management system in the prescribed safe condition, isolate the relevant power sources, and follow the Fireye and plant combustion-safety procedures before removal.

Q7. Is a surplus 48PT2-1007 acceptable for a burner-management system?
It can be, provided the unit’s condition and compatibility are established. The scanner is a safety-related combustion component, so procurement should include the actual part-number photograph, detector condition, cable condition, functional test result, and warranty. Do not install a surplus unit solely because the model number matches.