Reliable microprocessor electronics combined with rugged ball valve porting.
The first new art for condensate removal in the 1990's, SD4 applies proprietary
software to the system operation, self-diagnosis, error correction, and
communication with a host computer.

It incorporates the following four Self Diagnostics:
SD1 Trigger signal verification precludes false triggering

SD2 Self-restart after shutdown (loss of pilot air)

SD3 High water level alarm (onboard L.E.D.)

SD4 Low battery alarm (onboard L.E.D.)

NOTE: Output signals to the host computer can activate remote alarm and monitor
and record system performance, saving manpower and avoiding shutdown.