Product Name Inductive Proximity Switch Model SN04-N Theory Inductive Type Sensor Wire Type DC 3 Wire Type (Brown, Black, Blue) Output Type NPN, NC Detecting Distance 4mm Switch Appearance Type Angular Column Type Voltage DC 4.8-30V Current Output 500mA Detect Object Iron Size 34 x 18 x 18mm/1.3" x 0.7" x 0.7"(L*W*H) Cable Length 1.58M/62.2" External Material ABS Plastic Net Weight 60g Color Blue, Black Package Content 1 x Inductive Proximity Switch,ABS plastic shell, LED indicator light, angular column type, 3 wire system. When proximity switch is close to some target object, it will send out control signal. Power supply inverted connecting protection, short circuit protection, non-contact detecting device. Used widely in the machine tool industry, frequency counters and other automatic control system.