The ROTrol series controllers provide the flexibility needed to accomplish your monitoring and controls from the very basic to the most sophisticated water treatment equipment. ROTrol controllers incorporate TDS/conductivity sensors, pH monitoring, electronic flow metering, pressure sensing and other controls including motor controls, into a single package. R & D Specialties controls can save you manufacturing cost and enhance operating efficiency for you equipment. Since the first ROTrol control was built in 1993 R & D Specialties continues to improve the ROTrol series controllers to allow more flexibility to the original equipment manufacturer.