Check the listing for details. Honeywell C7027A1023 Ultraviolet Flame Sensor Old Stock. Color: Purple, Condition: New – Open box. Listed at 69.97 USD. The Honeywell C7027A1023 Ultraviolet Flame Sensor is a high-quality product designed for detecting flames in HVAC systems. With its purple color and model number C7027A, this flame sensor is reliable and efficient in its function. It is ideal for use in industrial applications where accurate detection of flames is crucial for safety and system operation. Built by the trusted brand Honeywell, this old stock item ensures compatibility and performance with a variety of HVAC systems.The Honeywell C7027A1023 Ultraviolet Flame Sensor is a high-quality product designed for detecting flames in HVAC systems. With its purple color and model number C7027A, this flame sensor is reliable and efficient in its function. It is ideal for use in industrial applications where accurate detection of flames is crucial for safety and system operation. Built by the trusted brand Honeywell, this old stock item ensures compatibility and performance with a variety of HVAC systems.