EN-DICATOR

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, system integrity monitoring, all of the foregoing in the fields of medicine, medical gasses, health care, and life safety