aviation environmental control system (ECS) and life support test sets

They are specialized pieces of Ground Support Equipment (GSE) used by avionics technicians to simulate and test cabin systems on an aircraft while it is parked in a hangar. • Left Unit: Features dedicated toggle switches and status lights for testing the "SMOKE SENSOR" circuits, managing "FIRE SUPPRESSION", checking "CONTINUITY", and overriding "MAIN POWER". • Right Unit: Functions as a "CABIN TEMP" (Cabin Temperature) simulator or selector panel, complete with built-in analog/digital gauges, heat meters, and rotary selectors used to manipulate cabin thermostat inputs during diagnostics. The rugged metal housing, heavy-duty orange handles, and multi-pin mil-spec connectors are designed to withstand harsh hangar and flight line environments. 3K OBO for the pair or 1750 a piece, again OBO.