Honeywell C7027A1064 / C7027A1072 – Ultraviolet Flame Sensor | Burner Control UV Detector
Engineering Background
The Honeywell C7027 series ultraviolet flame sensors are purpose-engineered for industrial and commercial burner management systems. Designed to detect the UV radiation emitted by hydrocarbon flames, these sensors provide a critical safety interlock within combustion control loops. The C7027A1064 and C7027A1072 are direct-replacement variants within the same platform, differentiated by mounting configuration and lead length, making them interchangeable across a wide range of Honeywell Protectorelay and RM7800-series primary controls.
Product Positioning
Targeted at procurement engineers and maintenance teams in power generation, petrochemical, HVAC, and industrial boiler applications, the C7027 series delivers proven UV flame detection with minimal false-trip rates. Konmask.com stocks both variants to support MRO procurement, emergency replacement, and OEM integration projects globally.
Complete Technical Specifications
- Part Numbers: C7027A1064 / C7027A1072
- Manufacturer: Honeywell Combustion Controls
- Series / Platform: C7027 Ultraviolet Flame Sensor
- Detection Principle: Ultraviolet (UV) radiation sensing
- Spectral Response: 185–260 nm (UV-C band)
- Supply Voltage: 120 VAC / 60 Hz (C7027A1064); 120 VAC / 60 Hz (C7027A1072)
- Operating Temperature: –40°C to +66°C (–40°F to +150°F)
- Flame Signal Output: DC microamp signal to compatible primary control
- Response Time: ≤1 second flame detection; ≤3 seconds flame loss
- Mounting: 1/2″ NPT threaded sight pipe (C7027A1064); extended lead / alternate mount (C7027A1072)
- Lead Wire Length: 18 in (C7027A1064) / 36 in (C7027A1072)
- Compatible Controls: Honeywell RM7800 series, R7847, R7849, R7851, Protectorelay series
- Approvals / Certifications: UL Listed, CSA Certified
- Weight: Approx. 200 g
- Country of Origin: United States
Proven Application Environments
- Industrial gas and oil-fired boilers (fire-tube and water-tube)
- Commercial HVAC burner management systems
- Power plant auxiliary burners and ignition systems
- Petrochemical process heaters and reformers
- Incinerators and thermal oxidizers
- Marine and offshore combustion equipment
- OEM burner assemblies requiring UL/CSA-listed UV detection
Engineering Advantages
- Solar-blind UV detection: Responds exclusively to flame UV radiation; immune to ambient light and solar interference, eliminating false trips.
- Fast response: Sub-second flame detection ensures tight safety interlock timing within RM7800-series control sequences.
- Dual-variant platform: C7027A1064 and C7027A1072 share identical electrical characteristics; only lead length and mounting differ, simplifying spares inventory.
- Wide temperature range: Rated to –40°C, suitable for outdoor installations and cold-climate boiler rooms.
- Proven field reliability: Decades of deployment in critical combustion safety applications across global industrial facilities.
- Drop-in replacement: Direct retrofit for legacy C7012, C7015, and C7027 installations without control panel modification.
System Architecture & Signal Flow
The C7027A sensor mounts on a 1/2″ NPT sight pipe aimed at the burner flame zone. Upon UV detection, the sensor generates a DC microamp flame signal transmitted via lead wires to the primary burner control (e.g., Honeywell RM7800L). The control module amplifies and validates the signal; if flame signal drops below threshold within the safety timing window, the control initiates lockout and closes the fuel valve. The C7027A1064/A1072 are passive sensors requiring no internal power supply — operating voltage is supplied by the connected primary control.
Sourcing & Quality Verification
- All units sourced from authorized Honeywell distribution channels or verified surplus with full traceability documentation.
- Each sensor undergoes incoming inspection: visual check, lead wire continuity, and UV tube integrity verification.
- Date codes and lot numbers recorded for full supply chain traceability.
- Packaging: original Honeywell OEM carton where available; otherwise anti-static protective packaging with part label.
- Certificate of Conformance (CoC) available upon request for critical procurement.
Procurement Process
- Step 1: Confirm part number (C7027A1064 or C7027A1072) against your existing installation or Honeywell BOM.
- Step 2: Add to cart and proceed to checkout — we accept T/T wire transfer, PayPal, and major credit cards.
- Step 3: Orders confirmed within 1 business day; shipping via DHL / FedEx with tracking provided.
- Step 4: For bulk orders (>10 units) or project-based procurement, contact us for volume pricing and lead time commitment.
- Lead Time: In-stock items ship within 2–3 business days; ex-stock orders within 5–7 business days.
Technical FAQ
Q: What is the difference between C7027A1064 and C7027A1072?
A: Both are functionally identical UV flame sensors. The C7027A1072 has a longer lead wire (36 in vs. 18 in) for installations where the primary control is mounted further from the burner sight pipe.
Q: Is the C7027A compatible with the Honeywell RM7800L?
A: Yes. The C7027A series is the standard UV sensor specified for the RM7800 family of primary controls, including RM7800L, RM7800G, and RM7840 variants.
Q: Can this sensor detect both gas and oil flames?
A: Yes. The C7027A detects UV radiation from both natural gas and fuel oil flames. Verify sight pipe alignment and flame geometry for oil-fired applications to ensure adequate UV exposure.
Q: What is the expected service life?
A: Honeywell recommends periodic replacement as part of a preventive maintenance schedule (typically every 3–5 years or per site safety protocol), as UV tube sensitivity can degrade over time with high-cycle operation.
Q: Do you provide a warranty?
A: Yes — 12-month warranty against manufacturing defects. Sensors showing physical damage from improper installation are excluded.
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