Honeywell C7035A1023 / C7035A1064 – UV Flame Sensor | Burner Management Platform
Engineering Background
The Honeywell C7035 series UV flame sensors are purpose-engineered for industrial and commercial burner management systems (BMS). Designed to detect ultraviolet radiation emitted by hydrocarbon flames, these sensors provide a critical safety interlock signal to flame controllers such as the Honeywell R4343, R7847, and RM7800 series. They are widely deployed in boilers, furnaces, process heaters, and thermal oxidizers across power generation, petrochemical, and HVAC industries.
Product Positioning
The C7035A1023 and C7035A1064 are functionally equivalent UV flame sensors differentiated by connector configuration and mounting thread. Both models deliver reliable, fail-safe flame presence detection with sub-second response, making them the preferred choice for procurement engineers specifying safety-critical combustion control loops.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Numbers | C7035A1023 / C7035A1064 |
| Manufacturer | Honeywell Building Technologies |
| Sensor Type | Ultraviolet (UV) Flame Sensor |
| Detection Wavelength | 185–260 nm (UV-C band) |
| Supply Voltage | 120 VAC / 240 VAC (controller-supplied) |
| Output Signal | Pulse signal to compatible flame amplifier |
| Response Time | ≤ 1 second (flame on); ≤ 2 seconds (flame off) |
| Operating Temperature | -40°C to +70°C (–40°F to +158°F) |
| Ambient Humidity | 5%–95% RH, non-condensing |
| Mounting Thread | 1/2″ NPT (C7035A1023) / M20×1.5 (C7035A1064) |
| Housing Material | Stainless steel body with UV-transparent window |
| Weight | Approx. 160 g |
| Certifications | UL Listed, CE Marked, FM Approved |
| Compatible Controllers | Honeywell R4343, R7847, RM7800 series |
| Country of Origin | USA / Germany (Honeywell global manufacturing) |
Proven Application Environments
- Industrial Boilers – Steam and hot-water boilers in power plants and district heating systems requiring continuous flame supervision.
- Process Furnaces & Kilns – High-temperature industrial furnaces in ceramics, glass, and metallurgy where reliable UV detection is mandatory.
- Thermal Oxidizers (RTO/TO) – Regenerative thermal oxidizers in VOC abatement systems requiring fail-safe burner interlock.
- Commercial HVAC Burners – Large-capacity commercial heating units in hospitals, data centers, and institutional buildings.
- Petrochemical Process Heaters – Fired heaters and reformers in refineries and chemical plants with stringent SIL-rated safety requirements.
- Marine & Offshore Combustion Systems – Shipboard boilers and offshore platform heaters operating in harsh ambient conditions.
Engineering Advantages
- Solar-Blind UV Detection – Responds exclusively to flame-generated UV (185–260 nm), immune to sunlight and incandescent light interference, eliminating nuisance trips.
- Sub-Second Response – Flame-on detection in ≤ 1 s ensures rapid burner startup confirmation; flame-off detection in ≤ 2 s provides fast safety shutdown.
- Wide Temperature Range – Rated –40°C to +70°C, suitable for outdoor installations and high-ambient industrial environments without auxiliary cooling.
- Robust Stainless Steel Housing – Corrosion-resistant body withstands vibration, moisture, and chemical exposure typical of combustion plant environments.
- Direct Drop-In Replacement – Pin-compatible with existing Honeywell C7027, C7035, and C7044 installations; no wiring modification required.
- Multi-Standard Certification – UL, CE, and FM approvals satisfy North American, European, and international project specifications simultaneously.
System Architecture & Signal Flow
The C7035A1023/A1064 UV sensor is installed in the burner sight port and wired directly to a compatible Honeywell flame amplifier or integrated burner controller. The sensor generates a pulsed UV signal proportional to flame intensity. The amplifier processes this signal and outputs a discrete flame-present relay contact to the burner management system (BMS) safety PLC or relay logic. In the event of flame failure, the sensor output ceases within 2 seconds, triggering the BMS to initiate a safe-state shutdown sequence and lockout.
Typical wiring: Sensor → Flame Amplifier (R7847/R4343) → RM7800 Burner Controller → Safety PLC / DCS
Sourcing & Quality Verification
- All units sourced through authorized Honeywell distribution channels or verified surplus with full traceability documentation.
- Each unit undergoes incoming inspection: visual check, date-code verification, and functional UV response test prior to dispatch.
- Original manufacturer packaging preserved where available; repackaged units include inspection report and Konmask QC label.
- Certificate of Conformance (CoC) available upon request for project documentation and FAT/SAT records.
- Lead-free RoHS-compliant units available; specify at time of order.
Procurement Process
- Confirm Model – Verify thread type requirement: 1/2″ NPT → C7035A1023; M20×1.5 → C7035A1064.
- Specify Quantity & Delivery – Standard lead time: 3–7 business days (stock); 2–4 weeks (factory order). Express air freight available.
- Request Documentation – CoC, datasheet, and test report available on request; include PO number in inquiry.
- Place Order – Add to cart or contact support@konmask.com for bulk pricing and blanket order arrangements.
- Shipping & Export – DDP/DAP Incoterms available; HS Code 8543.70 applicable for customs clearance.
Technical FAQ
Q: What is the difference between C7035A1023 and C7035A1064?
A: The C7035A1023 uses a 1/2″ NPT mounting thread (North American standard), while the C7035A1064 uses M20×1.5 metric thread (European/international standard). Electrical and sensing performance are identical.
Q: Is the C7035 compatible with the Honeywell RM7800 series?
A: Yes. The C7035 series is the recommended UV sensor for RM7800L, RM7800G, and RM7840 burner controllers when used with R7847 or R4343 flame amplifiers.
Q: Can the C7035 detect natural gas flames?
A: Yes. Natural gas, propane, fuel oil, and most hydrocarbon flames emit UV radiation in the 185–260 nm band detectable by the C7035. It is not suitable for detecting hydrogen flames without additional engineering review.
Q: What is the expected service life?
A: Honeywell rates the C7035 UV tube for approximately 10,000 hours of flame-on exposure. Annual inspection and periodic replacement per the burner OEM maintenance schedule is recommended.
Q: Do you provide a warranty?
A: Konmask provides a 90-day functional warranty on all units. New-in-box units carry the original Honeywell manufacturer warranty where applicable.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
