flow switches bfs-10-n / bfs-10-0 measuring ranges 0.005...0.06 i/min to 60...150 i/min for water; materials: brass version; meter: spring 1.4571; fitting:brass, nickle-plated; hosuing: brass, nickle-plated 1.4571; magnets: ferrite; operating temp: 100 c (standard) , 160 c (option ht) accurancy: plus or minus 10% f.s.; electrical connection:plug acc.to din en 175301-803 (din 43650c) ; protection class: IP65 (plug acc. din en 175301-803 formaly din 43650c) ip 67 (with moulded cable)