Good Price High Quality Flame Scanner FIREYE 45UV5-1005 is Widely Used in Industrial Control.

Key Technical Data – FIREYE 45UV5-1005

This specification block is suitable as a quick reference section for online listings, datasheets or quotation documents.

Design Concept and Construction

Internally, the 45UV5-1005 uses a sealed UV detector tube often referred to as a “UV eye.” The tube is filled with gas and equipped with two electrodes connected to an AC voltage source. When UV radiation from a flame reaches the tube, it triggers an ionization process between the electrodes; the gas becomes conductive and current flows in short bursts known as avalanches. The pulses stop almost immediately when the flame disappears.

The scanner housing is made from cast aluminum with an oil-resistant gasket. A plano-convex quartz lens is fitted at the front, which improves UV collection and sensitivity while tolerating high temperatures. An electromagnetic shutter is built into the optical path; this shutter is opened and closed by the associated Fireye control as part of the self-checking routine.

Key mechanical features:

• 1" NPT mounting thread for direct installation into a sight pipe or swivel mount

• Purge air connections (3/8" port or 1" tee/wye via sight pipe) to keep the lens clean and the housing cool

• Compact body suitable for burner fronts, windboxes and tight burner plate layouts

The overall design is aimed at long service life in harsh combustion environments, while keeping installation and service reasonably straightforward.

How the 45UV5-1005 Self-Check Function Works

The “self-check” feature is what distinguishes the 45UV5 series from basic non-checking UV sensors. In the 45UV5-1005, the shutter drive circuitry is not inside the scanner; instead, it resides in the compatible Fireye control or in the external 61-5745-3 drive circuit. The control periodically energises the shutter to close the optical path, then verifies that the UV tube output drops to zero.

During normal operation:

• Shutter open: UV radiation from the burner flame reaches the tube and produces a train of pulses. The amplifier in the Fireye control interprets this as a valid flame signal.

• Shutter closed: The flame is still present, but the optical path is blocked. The control expects the scanner output to drop, confirming that the UV tube and signal circuit are operating correctly.

The result is a continuously interrupted but supervised flame signal. If the scanner, wiring or amplifier fails in a way that might falsely simulate a flame, the self-check routine detects the inconsistency and forces the control into lockout.

This architecture satisfies the requirements of many burner safety standards for continuous operation with automatic checking of the flame detector.

Integration with Fireye Flame Safeguard Systems

The 45UV5-1005 is not a stand-alone sensor. It is intended to be used exclusively with Fireye flame safeguard and burner management controls, providing UV flame detection for supervised manual, semi-automatic and fully automatic single-burner systems.

Typical compatible platforms include:

• P-Series Flame Safeguards (using the 61-5745-3 shutter drive module)

• MicroM and E-Series / BurnerLogix modules with UV self-check capability

• Flame-Monitor™ and other designated Fireye controls identified in the datasheet notes

In these systems, the scanner:

1. Supplies the UV flame pulses via the red leads.

2. Receives shutter power via the black leads.

3. Is supervised by the control’s internal logic for both flame presence and scanner integrity.

Correct pairing of scanner model, amplifier and programmer module is essential to maintain approvals and safety performance.

Installation, Alignment and Purge Air

The datasheet gives detailed guidance on how to sight and mount the 45UV5-1005 for reliable flame detection. Key recommendations include:Aim the scanner so that its line of sight intersects the burner centreline near the base of the flame, where UV intensity is greatest.

• Ensure it can see both pilot flame and main flame, but does not see adjacent burners or hot refractory not related to the supervised burner.

• Consider the direction of secondary air rotation; often the best location is slightly downstream of the pilot in the direction of air swirl.

• Avoid obstructions such as register vanes in the line of sight; trim or reposition if necessary.

The maximum recommended viewing distance is around 72 inches (1.83 m), with a field of view of roughly 1 inch per foot. If longer sight pipes are needed, the diameter should be increased to avoid restricting the scanner’s view.

For purge air:

• Provide about 4 SCFM (≈113 L/min) under normal conditions, via the 3/8" housing port or a 1" tee/wye on the sight pipe.

• Increase up to 15 SCFM (≈425 L/min) for dirty fuels or high ambient temperatures to keep the internal temperature within its -40 °F to 200 °F rating.

Purge air keeps the lens free from soot, dust and oil, and significantly improves both signal stability and scanner lifetime.

Fuel Types and Application Areas

The 45UV5-1005 is specified for detecting UV emissions from a wide range of fossil fuel flames, including:

• Natural gas and methane

• Propane and butane

• Coke-oven gas

• Kerosene and light petroleum distillates

• Diesel and similar liquid fuels

Typical applications include:

• Industrial and commercial boilers (hot water or steam)

• Process heaters and furnaces in refineries and petrochemical plants

• Ovens and dryers in paper, textile, metals and food industries

• Single-burner combustion systems on heating, ventilation and power generation equipment

For steam-atomised oil and pulverised coal, Fireye generally recommends infrared (IR) scanners instead of UV, so fuel type must be considered at the selection stage.

Advantages in Day-to-Day Use

Choosing the FIREYE 45UV5-1005 offers several practical advantages:

• Self-checking safety – The external shutter drive and supervised UV tube ensure that a failed detector is recognised and the system locks out instead of silently failing.

• High selectivity – Narrow-band UV sensitivity with no response to visible/IR radiation helps avoid false indications from hot surfaces, ignition systems or ambient light.

• Robust construction – Cast-aluminum housing, quartz optics and purge-air design support long life in industrial environments.

• Wide compatibility – Designed for integration with P-Series, MicroM, Flame-Monitor and BurnerLogix families, making it suitable both for OEM builds and retrofit work.

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• “UV self-check flame detector with external shutter drive, compatible with Fireye P-Series, MicroM and BurnerLogix controls”

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In summary, the FIREYE 45UV5-1005 is a proven UV self-check flame scanner for single-burner systems firing common gaseous and light liquid fuels. Its combination of robust mechanical design, supervised UV detection and tight integration with Fireye flame safeguard controls makes it a dependable choice for safety-critical combustion installations.