Honeywell C7012A1145 UV Flame Detector

Honeywell C7012A1145 Purple Peeper UV Flame Detector 120V 50/60Hz

The Honeywell C7012A1145 (commonly designated as the Purple Peeper) is a heavy-duty, industrial-grade ultraviolet (UV) flame detector engineered for continuous flame monitoring in commercial and marine combustion systems. Utilizing a high-sensitivity ultraviolet gas-filled phototube, it detects radiation in the 180 to 240 nanometer wavelength spectrum emitted by gas, oil, and dual-fuel burner flames. Built into a robust NEMA 4 cast-aluminum housing, it provides reliable flame discrimination and feeds precise electrical signals to primary safety controls and burner management systems (BMS).

Model Details

• Manufacturer: Honeywell Commercial & Industrial Combustion
• Model Series: C7012A
• Manufacturer Part Number (MPN): C7012A1145
• Condition Options: Factory New

Technical Specifications

Key Features

1. High-Speed Optical Response: Instantly detects ultraviolet radiation spikes to prevent hazardous unburned fuel accumulation during burner trips.
2. Rugged Marine-Grade Construction: NEMA 4 / IP66 cast aluminum housing withstands severe vibration, saltwater mist, and aggressive industrial environments.
3. Wide Thermal Tolerance: Operates dependably in extreme boiler room ambient temperatures ranging from -40°F to +200°F.
4. System Integration: Directly interfaces with legacy and modern Honeywell Burner Management Systems, amplifier modules, and flame safeguard controls.
5. Serviceable Optical Assembly: Features replaceable UV sensor tubes and quartz windows for simplified field maintenance.

Industrial Applications

• Marine boilers, auxiliary steam generators, and thermal fluid heaters.
• Industrial process furnaces, kilns, and high-capacity thermal oxidizers.
• Commercial water tube and fire tube boiler burner fronts.
• Gas turbine combustion monitoring and heavy-duty industrial heating units.

Equipment Compatibility & Cross-References

• Compatible Control Units: Honeywell BC7000, RA890, R7249, R7749, and RM7800/EC7800 series flame safeguard amplifiers (UV amplifiers).
• Cross-Reference Part Numbers: C7012A1033, C7012A1090, C7012A1129, C7012C series equivalents (application-dependent).

Frequently Asked Questions

What causes the Honeywell C7012A1145 to trigger false burner trips?

False trips are typically caused by quartz window fouling from soot or oil mist, degraded internal UV tubes, or extraneous non-flame UV sources such as arc welding or hot refractory glowing above 2400°F. Regular lens cleaning and correct sighting angle adjustment resolve most issues.

Can the C7012A1145 be used in hazardous marine engine room locations?

The C7012A1145 features a robust NEMA 4 / IP66 cast aluminum housing suitable for standard boiler rooms. For classified hazardous zones, ensure you verify if an explosion-proof housing or explosion-proof model derivative is required by your vessel’s safety management system.

How do I test the UV sensor tube without firing the boiler?

You can use a dedicated UV test lamp (simulating 180–240 nm radiation) aimed directly at the detector quartz window while the burner control is in standby or test mode to verify correct signal transmission to the safeguard amplifier.