Description
Honeywell C7035A1023
Technical Specifications
- Detection band: 190–270 nm ultraviolet
- Detection response time: ≤0.1 seconds
- Output signal: SPDT dry contact, contact rating 2 A / 220 V AC
- Supply voltage: 120 V AC 50/60 Hz
- Operating temperature: -40 °C to +80 °C
- Detection angle: 90° wide conical field of view
- Protection rating: IP65
Functional Features High-gain UV photosensitive tube detects weak pilot flame at extended range. Wide 90° field of view, covers full main burner flame envelope. Integral dry contact output, directly drives external safety relays. Built-in signal gain adjustment, optimize sensitivity for different flame sizes. On-board power, flame and fault LEDs for commissioning diagnostics. Sealed cast aluminum housing, withstands harsh industrial outdoor environments.
Application Scenarios Flame monitoring for medium-sized industrial process boilers Main flame detection for industrial heating furnaces Pilot flame detection at extended sight distances Spare part replacement for low-sensitivity legacy UV detectors
Performance Parameters
- Detection range: Stable detection of main flame within 8 meters
- Ambient light rejection: 20,000 lux visible light without false trigger
- Contact mechanical life: 100,000 operations
- Operating temperature tolerance: -40 °C cold start rated
- Mounting thread: 1 inch NPT
Material Composition Die-cast aluminum housing with corrosion-resistant powder coat High-sensitivity UV photosensitive tube Quartz glass detection window Stainless steel internal shutter mechanism IP65 cable gland Nickel-plated brass terminals
Structural Features Robust cylindrical cast aluminum housing. Front quartz glass detection window with internal shutter. Rear terminal block inside sealed wiring compartment. 1 inch NPT mounting thread. Front panel LED array visible through the housing lens.
Working Principle Flame ultraviolet radiation passes through the quartz window to the high-sensitivity UV photosensitive tube. The tube generates an electrical signal proportional to UV intensity, triggering the internal SPDT relay to close when UV exceeds the preset sensitivity threshold. The closed contact sends a “flame present” signal to the burner management system. On flameout, UV drops below threshold, the relay opens, and the system initiates safety shutdown. On-board gain adjustment sets the threshold for specific flame detection requirements.
Installation Requirements Mount the detector at a line-of-sight position covering the entire flame envelope. Tighten into the sight port, angle to avoid flue gas direct impingement on the window. Connect supply and output contact wires to the terminal block. Adjust sensitivity gain during commissioning, confirm stable flame signal without ambient false triggers.
Usage Notes Sensitivity set too high causes false triggers from sunlight reflected off furnace walls. Dust coating on the window reduces UV transmission, clean the window quarterly. Never install the detector in a position where combustion air cooling targets the window, thermal shock cracks the quartz glass. Cold start below -40 °C requires 5 minute warm-up before normal operation.
