73827538
Sep 25, 1989
Apr 16, 1991
ELECTRONIC LOGIC CONTROL UNIT FOR USE IN THE TREATMENT OF INDIVIDUAL WATER SYSTEMS, NAMELY TO ANALYZE THE CHEMICAL MAKEUP OF THE WATER; DETERMINE THE PROPER TREATMENT PROGRAM; APPLY THE REQUIRED TREATMENT; CONTROL THE APPLICATION OF THE TREATMENT; AND MONITOR THE EFFECTIVENESS OF THE TREATMENT
Electrical and Scientific Apparatus