DFM5001AP-C8-FLOW SWITCH 50L/MIN AIR N2 PNP I C8 12.The DFM5001AP-C8 Flow Switch is a precision device designed to monitor and regulate air and nitrogen flow at rates up to 50 liters per minute. It easily fits with industrial automation, HVAC systems, laboratory, and process control settings, thanks to its PNP output and C8 connection.