pH CONTROLLER & TRANSMITTER The pH 600 - 1 series of pH Controller and Transmitter provides a reliable method of Monitoring, Controlling & Transmitting 4 - 20mA / RS 485 MODBUS RTU communication for Interfacing to PLC, Data logger, HMI, etc., . This product is suitable to measure pH in water treatment, Electrolytic water cleaning, Chemical Industries, Food Process, Waste Water treatment, Textile Industries & Neutralization process, etc., . This pH Controller & Transmitter can Measured using Industrial Combined pH Sensors, Temperature can be measured using temperature sensor. This pH Controller & Transmitter has many User Friendly and Safety Features Which as Follows.