This is a NPN normally open (NO) type of proximity inductive sensor.
Balluff order code BES0057.
In this sensor Brass, Nickel-free coated material has been used Housing, PVC for jacket and PBT for sensing surface.
This sensor has Protection against Reverse Polarity , Protection against device mix-ups and Short-circuit protection.
The sensor becomes functional again after the overload has been eliminated.
It is approved by:
Basic standard IEC 60947-5-2