Products

PH/ORP Controller – 5520

ROC® PH/ORP-5520 is a high-precision, panel-mounted online pH and ORP controller designed for continuous monitoring and control of water quality in industrial and environmental applications. It belongs to the ROC 5500 series, known for its robust EMC protection, user-friendly interface, and reliable signal output.

The 5520 model is powered by AC 220 V and is ideal for integration in systems requiring real-time feedback, dual relay control, and analog signal transmission to PLCs or SCADA systems.

Features

• Dual Parameter Monitoring: Measures both pH and ORP (Oxidation-Reduction Potential) with high accuracy.
• Automatic or Manual Temperature Compensation: Compatible with NTC 10K temperature sensors for precise correction.
• Dual Relay Output: Independent alarm outputs for pH or ORP high/low setpoints with programmable delay and hysteresis.
• Isolated 4–20 mA Output: Analog signal suitable for process automation and remote monitoring.
• Intuitive Backlit LCD Display: Shows real-time pH, ORP, temperature, alarm status, and output signal.
• Two-Point Calibration: Simple buffer calibration process for accurate measurement.
• Compact DIN Panel Design: Easy to install with a standard 96×96 mm panel cut out.
• EMC-Compliant: Built to resist electromagnetic interference in industrial settings.

Applications

• Reverse Osmosis (RO) systems
• Drinking water & wastewater treatment
• Cooling tower water control
• Swimming pools & aquaculture
• Chemical & pharmaceutical manufacturing
• Industrial process water quality monitoring