EUTECH INSTRUMENTS, Controller, models:

?lpha-CON 1000	Instruction Manual
ALPHA CON 100 - REV 1.1	Instruction Manual
ALPHA CON 1000 CONDUCTIVITY CONTROLLERTRANSMITTER	Instruction Manual
ALPHA CON 200 CONDUCTIVITY CONTROLLERTRANSMITTER	Instruction Manual
Alpha CON 100 C	Instruction Manual
Alpha-CON560	Instruction Manual