ASCO P122AFSAF8U7000 self-checking scanners are used to detect 295 to 340 nanometers wavelength ultra-violet emissions. 

Typical Applications: Duct Burners, Industrial Gas Burners, Refinery Applications, Low NOx Burners, Waste Gas Units and Incinerators.
ASCO P122AFSAF8R4000 self-checking scanners are used to detect 830 to 1100 nanometers wavelength infrared emissions. They are suited for application to duct burners, industrial gas burners, refinery applications ignition systems and Low NOx detection and for continuous or non-continuous burner operation.
Typical Applications: Duct Burners, Industrial Oil Burners, Refinery Applications, Waste Oil Units and Incinerators. NOTE: Because the sensors are solid state devices they can perform well with many different fuels. For example UV is typically used on gaseous fuels but can also be applied to oils and heavy oils. To be 100% sure of correct application a test should be performed. 
We DO NOT recommend the scanner for use on small pilot flames or obstructed sighting.

• Input Power: 24 Vdc nominal,  supply current 200 mA
• Electrical Connection:  8-PIN quick-disconnect
• Relay Outputs: 
  • FLAME RELAY, SPST (N.O.)
  • FAULT RELAY, SPST (N.C.) 
• Contact Rating: 
  • Minimum: 10 mA @ 5 Vdc
  • Maximum: 2 A @ 30 Vdc, 2 A @ 230 Vac (Resistive load) 
• Analog Output: 
  • Optically isolated 4 to 20mA dc current referenced to 24 Vdc common, maximum connected load: 750 Ohms. 
• Status Indication: Multiple LED indication for flame signal strength, flame relay, ready, target, background select and fault codes
• OPTICAL:
  • UV models - 295 to 340 nanometers 
  • IR models - 830 to 1100 nanometers 

• Temperature Rating: 0°C to 60°C