Model 40/40L (or Lb, with Built-in-test option) provides a combination of UV and IR sensors, 

 The new SharpEye UV-IR High Speed Optical Flame detector 40/40U FL is designed to meet two major requirements: 

 The new 40/40R Single IR Flame Detector detects hydrocarbon-based fuel and gas fires using advanced flame analysis tools. 

 The new 40/40 UV Flame Detector detects hydrocarbon-based fuel and gas fires, invisible hydrogen flames, and fires from hydrides, ammonia , silane and other organics. 

 The new 40/40I, a multi spectrum based on three IR bands (IR3), detects fuel and gas fires at long distances with the bigbest immunity to false alarms. 

 - Fast response with high sensitive UV and IR sensor