The Honeywell U2-S flame sensor is a multifunctional solution that integrates both flame detection and signal processing. This all-in-one solution eliminates the need for a separate processor, saving on cabinets and wiring, while simplifying installation and maintenance. The sensor is suitable for single and multi-burner, multi-fuel and difficult flame detection applications.

Features and Benefits:

• Integrated sensor and signal processor
• Advanced diagnostic safety features
  • Electronic control (no mechanical shutter) to ensure self-monitoring of the system
• Multiple sensor options: UV tube, Solid State IR and Solid State UV
• Independent configuration and adjustable gain settings for each sensor
• Fully programmable using a touchscreen interface
• Communication via Modbus for external programming and compatible with FlameTools or other master device.
• Input power: 22-26 VDC, 120 mA max.
• Output relay contacts: one normally open flame relay and one normally open fault/self-checking relay (1A, 30 VDC)
• Ambient temperature: -40°C to 70°C
• Analog flame signal: 0-20 mA or 4-20 mA output
• Housing: IP66
• Adjustable flame on/off threshold
• Adjustable response time to flame failure: 1, 2 or 3 seconds
• Not adversely affected by X-rays and gamma rays

Documentation: