EN-VISION

Signaling apparatus and instruments, namely, electronic circuit boards, sonar devices, wired and wireless transmitters and alarms, battery-powered and electronically-powered signal processors, housings and connectors for such goods and sold together therewith, namely, tethers, connectors and faceplates, for use in obstruction detection, pressure management, quality monitoring, functionality monitoring, and system integrity monitoring, all of the foregoing in the fields of residential and commercial security, fire extinguishment, fire suppression, industrial gasses, recreational use, and life safety