Fixed-rate dosing assumes the water never changes. pH and ORP feedback removes that assumption: the controller sees the result and corrects the dose.
The Operating Reality
A dosing skid reads pH, ORP and conductivity on the circulating line and adjusts acid, alkali, inhibitor or biocide feed to hold setpoints.
Why It Matters
Process load, make-up quality and weather all shift the required dose. Feedback control absorbs those shifts automatically, which is why concentration compliance moves from the 65-80% range to 98% or better.
How It Works in Practice
- AI decision logic on pH, ORP and conductivity runs with control error under ±5%.
- The controller learns the water-quality pattern of the specific loop, reducing hunting and overshoot over time.
- Setpoints, alarms and dose history are exposed to PLC, DCS or GPRS telemetry.
Selection Checklist
- Choose the control signal (pH, ORP, conductivity or flow-proportional) before sizing equipment.
- Size the metering pump to the working dose with margin, not to peak demand.
- Confirm wetted-part compatibility for every chemical to be fed.
- Require leak detection, dry-running protection and containment in the installation.
- Plan integration with PLC, DCS or remote telemetry from the start.
Related Products
- Automatic Chemical Dosing System
- Automatic Condenser Tube Cleaning System (ATCS)
- Constant Pressure Water Make-up System
FAQ
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