Welcome to pH Controllers by CWC
Everything you need to know!

Convergent Water Controls (CWC) is a leading supplier of the following products to the Australian water treatment industry: Cooling Tower Dosing Packages, Chemical Dosing & Transfer Pumps, Sensors, Instruments and Controllers with Remote Control capability. Our speciality is pH controllers in single and dual formats, and combined with other measured variables.
What's on this page?
pH Controller Problems
The following issues that plague basic pH controllers and their applications, which can be overcome with EMEC pH Controllers.
- Small or dull pH displays hard to read - EMEC pH controllers have large bright readout of pH
- Inaccurate pH readings - EMEC high quality electronics ensure high resolution and high accuracy
- Basic control resulting in undershoot or overshoot - EMEC provides flexibility of ON/OFF, Proportional or PID control ensuring stable pH control
- Overdosing of Acid or Caustic - EMEC Controllers have maximum feed timers and probe failure detection to prevent this from occurring
- pH out of specification - EMEC Controllers have the option of being monitored remotely via the www.ermes-server.com portal with immediate alarming via SMS or email when pH is out of range.
EMEC pH Controllers
Our single Channel LDPH (ON/OFF or Proportional Control) or LDSPH PLUS (Single Channel PWM, Proportional Pulse or PID) controllers will suit most applications requiring control of Acid and/or Caustic. For Trade Waste and multiparameter applications, it may suit better to select the LDPHPHT dual pH controller or the CENTURIO Multi-paramater controller, which can have multi channel pH or pH with other variables in one touchscreen controller.
EMEC pH Controllers
Features & Benefits
- Large display of pH to 0.01pH resolution with superior accuracy
- Multiple outputs - relay, pulse, 4-20mA
- Single or multi channel - saves cost on multiple controllers
- Selectable temperature compensation ensures accuracy in high or low temperature media, or with wide temperature swings
- Calibration with buffers or comparative calibration method
- Industrial enclosures IP65
- Panel mount, Surface Mount, DIN rail mount
- Remote comms options - 4G, WiFi, Ethernet, Modbus
Controller Configurations
pH Controllers, either 1 channel, 2 channel or multi channel are capable of dosing Acid and/or Caustic via Pulse or Relay. The control methods possible consist of : ON/OFF, Proportional, Proportional with Flow meter compensation, or Feedforward PID.
How to Buy?
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