Abstract: Explosion proof enclosures and explosion proof connectors and sensors are used to render a machine, intended to be operated in an explosive environment, explosion proof. An explosion proof connector includes an intermediate section having an input portion to receive a cable from a terminal external to an explosion proof enclosure and an output portion for passing the cable for connection to a terminal within an explosion proof enclosure. A sealing tube which extends between the input and output portions has a central opening for enabling a cable to be passed through. A sealant may be injected into the sealing tube to form an air tight connection between the cable and the inner walls of the sealing tube which inhibits a hazardous condition from passing through and around the sealing tube. An explosion proof sensor includes potting and encasing the sensor in its own explosion proof case.