PEPPERL+FUCHS Inductive proximity sensor NBB20-L2-E2-V1 in Pakistan BR2568 Sensor head bidirectional and rotatable 20 mm flush 3-wire DC Quick mounting bracket 4-way LED indicator General specifications Switching function Normally open (NO) Output type PNP Rated operating distance 20 mm Installation flush Output polarity DC Assured operating distance 0 ... 16.2 mm Actual operating distance 18 ... 22 mm Reduction factor r Al 0.33 Reduction factor r Cu 0.31 Reduction factor r 304 0.74 Reduction factor r Brass 0.41 Output type 3-wire Nominal ratings Operating voltage 10 ... 30 V DC Switching frequency 0 ... 440 Hz Hysteresis typ. 5 % Reverse polarity protection reverse polarity protected Short-circuit protection pulsing Voltage drop ? 2 V Operating current 0 ... 200 mA Off-state current 0 ... 0.5 mA No-load supply current ? 20 mA Time delay before availability 80 ms Operating voltage indicator LED, green Switching state indicator LED, yellow Functional safety-related parameters MTTF d 1289 a Mission Time (T M ) 20 a Diagnostic Coverage (DC) 0 % Ambient conditions Ambient temperature -25 ... 85 °C (-13 ... 185 °F) Storage temperature -40 ... 85 °C (-40 ... 185 °F) Mechanical specifications Connection type Connector plug M12 x 1 , 4-pin Housing material PA Sensing face PA Degree of protection IP69K Cable Cable diameter 3.3 mm ± 0.15 mm Mass 130 g