FS-480 Series - high flow low pressure drop stainless steel flow switch Brand: Gems Model: FS-480 Operating voltage: 125/250 (V) Overload current: 10 (A) Certification: CE flow rate: 0.5GPM to 3.00GPM Interface : 1/2 "NPT, 3/4" NPT, 1/2 "compression fittings Primary Construction Material: 316 Stainless Steel Setting Type: Fixed FS-480 and FS-380 for the same family, but the pressure drop ratio FS-380 25% smaller, in particular for the semiconductor industry and medical applications critical flow measurement devices. glass reinforced PPS type 316 stainless steel forged piston and housing to make it more robust, especially suitable for high pressure lubrication system and cooling system.