Description
Honeywell C7027
Technical Specifications
- Detection Principle: Ultraviolet gas discharge tube sensing
- Sensing Spectrum: 185 nm to 260 nm UV band
- Working Temperature: -40°C to +102°C
- Maximum Sealed Pressure: 34.5 kPa
- Mounting Interface: 1/2 inch NPSM internal thread collar
- Lead Wire: 18 AWG high temperature color coded wire, 2.44m standard length
- Response Time: 0.3 seconds maximum
- Housing: Compact metal cylindrical housing
- Certification: CE EN298, AGA, UL
- Sensing Tube: Non-field replaceable integrated tube
Functional Features Ultra compact size fits narrow blast tube installation. It supports parallel wiring for multiple sensors to improve flame detection reliability. It is sealed to withstand low positive pressure inside combustion chamber. It has high temperature insulated lead wire for high ambient area. It outputs pulse UV signal to matched flame amplifier. It resists interference from visible light and infrared radiation. It is low cost compact flame supervision solution for standard burners.
Application Scenarios Small gas boiler flame monitoring Package burner flame safety supervision Industrial oven and furnace burner control Waste heat burner flame detection Compact combustion equipment sight pipe installation Honeywell burner management system spare replacement
Performance Parameters
- Minimum UV Sensitivity: 0.7 μW/cm²
- Insulation Resistance: greater than 1000 MΩ
- Vibration Resistance: 5g continuous vibration
- Mean Time Between Failures: 720000 hours
- Signal Pulse Frequency proportional to flame UV intensity
Material Composition Nickel plated brass cylindrical housing High purity quartz viewing window UV sensitive gas discharge tube High temperature FEP insulated lead wire Fluoro rubber sealing O-ring Metal mounting collar
Structural Features Small cylindrical body with front quartz window. Integral mounting collar with 1/2 NPSM internal thread. Two color coded lead wires extend from rear end. O-ring seal between collar and sight pipe. No internal user serviceable parts. Compact outline allows installation into narrow blast tube.
Working Principle UV radiation from combustion flame passes through quartz window and enters UV discharge tube. UV photon ionizes gas inside tube and generates pulse electrical signal. The signal transmits through lead wire to external flame amplifier. Amplifier converts pulse signal into flame on/off state and sends signal to burner safeguard controller. When flame disappears, UV pulse signal stops, controller triggers fuel shut-off interlock.
Installation Requirements Screw the mounting collar onto 1/2 inch sight pipe, align window to flame. Tighten collar and confirm O-ring seal. Route lead wire to matched Honeywell flame amplifier terminals. Keep lead wire away from high temperature surface and power cable. Verify flame signal during burner commissioning.
Usage Notes The integrated sensing tube cannot be replaced on site, replace whole sensor when failure occurs. Clean quartz window periodically to remove soot and dust. Do not expose sensor to welding arc UV light, which causes premature tube aging. Do not pull lead wire hard at sensor root. This sensor must be used with Honeywell approved flame amplifier and burner controller.
