Magnet safety proximity switch BNS 250-11ZG â Schmersal â â9250: Type of operation Magnet, Type of electrical connection Cable, Type of switching output Reed Width of the sensor 33 mm, Height of the sensor 25 mm, Length of the sensor 13 mm, E xplosion protection category for gas without, Explosion protection category for dust without, Housing construction Cuboid, Material of the housing Plastic, Coating of housing uncoated, Assured operating distance OFF 14 mm, Assured operating distance ON 4 mm, Max. output current at the protected output 100mA, Ambient temperature -25..70 °C, Rated supply voltage for DC 24V, Voltage DC, Cross-/short-circuit detection possible no, Degree of protection (IP) IP67