The Honeywell Analytics 00705-A-1733 705 Aluminum Combustible Sensor is a gas detection component designed for compatible combustible gas monitoring systems used with commercial and industrial HVAC equipment. It continuously detects the presence of combustible gases and sends a signal to the monitoring system when gas concentrations approach preset levels, enabling timely safety respo... https://www.partshnc.com/00705-a-1733-honeywell-analytics-705-alum-combustible-sensor