721-3972, SMC, SMC Compact Mount Flow Controller, 1 → 50 L/min, PNP Output, 24 V dc, 1/8 in Pipe, Brand SMC, Maximum Flow Rate 1 → 50 L/min, Control Output PNP, Mounting Style Compact SMC Compact Mount Flow Controller, 1 → 50 L/min, PNP Output, 24 V dc, 1/8 in Pipe