Measurement
Incoming-water measurements plus a post-treatment optical measurement for feedback.
Compass EOR
Enhanced organics removal. Feed-forward prediction with a treated-water measurement to trim the dose through feedback control.
Drinking water
Enhanced organics removal.
Feed-forward prediction with a treated-water measurement to trim the dose through feedback control.
Software shaped around your process
From a signal to a strategy.
The value is in the relationship between the measurements, the model and your treatment objective.
Explore the technologyInputsIncoming water measurements
Bring together the online water-quality and process measurements agreed for the treatment duty. PMA reviews their location, units and history for the site.
Compass algorithmSite-specific dose prediction
A relationship developed from process evidence translates changes in incoming water into a predicted coagulant demand. The treatment objective shapes the model.
OutputCoagulant-dose control
The calculated dose feeds the agreed plant control arrangement. Control limits, the existing dosing approach and operator responsibilities are reviewed before handover.
Compass data / illustrative interface
See the signal. See the decision.
Read incoming turbidity and dissolved organic carbon (DOC) alongside the calculated dose. In this example, the dose responds to rising organics even while turbidity falls.
Incoming turbidity06.8NTU · demo value
Incoming DOC05.2mg/L · demo DOCeq
Calculated dose38.4mg/L · demo value
Incoming turbidityIncoming DOCCalculated dose
EarlierTime →Now
Illustrative UI only. Fictional values; trends use separate relative scales. DOC is shown as an optical equivalent (DOCeq). Site-specific calibration and validation are required.
The data behind the model
Measurements with
a defined purpose.
Objective
Enhanced organics removal within the agreed drinking-water treatment objective.
Control context
A treated-water measurement trims the dose calculated by the incoming-water feed-forward model.
Explore the treatment duty.
Review the measurements, objective and evidence for this application.
From application to control
A considered route
to your next step.
Understand
Define the treatment objective, source variability and current dosing approach.
Review
Bring together online measurements, operating records and laboratory evidence.
Configure
Agree the instrumentation generation, measurement arrangement and plant interface.
Validate
Establish a site-specific assessment and review the model before the agreed control handover.
Application questions
A closer look.
What does EOR add?
EOR adds treated-water feedback to the incoming-water prediction, allowing the dose to be trimmed for the enhanced organics-removal duty.
Which sensors are used?
The May 2025 instrumentation pack specifies TriOS OPUS for feed-forward measurement and LISA UV for feedback. Older literature refers to s::can. PMA confirms the configuration for your project.
Developed around
your process.
A treated-water optical measurement provides feedback to trim the dose predicted from incoming water quality. The treatment objective and measurements determine the proposed control configuration.
- Defined treatment objective
- Site-specific algorithm
- Configuration review with PMA
The right context.
A practical starting point.
- Application
- Drinking water
- Treatment duty
- Enhanced organics removal
- Control approach
- Feed-forward prediction with feedback trim
- Configuration
- Reviewed for the site and applicable system generation
Technical information
Explore Compass EOR in detail.
Explore the range brochure, or ask PMA for current Compass EOR instrumentation and configuration details for your site.
Explore the range.
A clearer starting point
Your questions,
answered.
How is feed-forward control different?
Feed-forward control uses measurements of incoming water quality to calculate a dose before changes pass through treatment. A site-specific algorithm relates those measurements to coagulant demand.
Which Compass model should we consider?
Compass and Compass EOR cover drinking-water duties. Compass CPR and Compass CEP cover distinct wastewater duties. PMA can review your treatment objective, existing process and available measurements.
Does every installation use the same instruments?
The instrumentation and integration depend on the system generation and the site. A configuration review establishes the sensors, control signals, communications and installation arrangement for your project.
Can we use our existing plant measurements?
Share the instruments, signals and control arrangement already available at your site. Compatibility and the measurements required for your application need to be reviewed for the proposed configuration.
