The model 438RI (Adjustable Interval Time Capsule) is an all Solid State In-Line timing device providing control of any load device operating from 115 or 230V AC or DC. Timing is Adjustable
from 1 to 1000 seconds. When power is applied, the 438RI turns "On" permitting full load current to flow. At the end of the preset timing period the 438RI turns "Off" and permits only leakage
current to flow through the load. The interval timing action can be repeated by removing and re-applying the operating voltage.