Image is Representational - See Manufacturer Specs | Contact Blocks Explosion Proof Heavy Duty Limit Switch The LSXZ3K Contact Block from Honeywell is designed for use with LSX Series basic switches. LSX Series switches are typically used in hazardous environments. Switch accessories are electromechanical devices used for facilitating contact in electrical circuits. These interfaces between the electrical system and the real world enable changing the state of a system from ON to OFF and vice versa. Available with a variety of actuation heads and several non-sparking actuators this LSXZ3K