Online Water Hardness Analyser
Monitor hardness changes where treatment performance and downstream protection matter.
Online Water Hardness Analyser with 3S
Water-hardness measurement helps operators follow softening performance and protect boiler, cooling, reverse-osmosis and industrial water systems. The 3S-CL automates the selected wet-chemistry method so results can be reviewed routinely at the process.
For sample-point and response planning, explore Softener Hardness Monitoring.
The required hardness expression, expected range and water matrix should be agreed before configuration. PMA can assess sample-point conditions and whether the intended result is suitable for process control, trend monitoring or treatment verification. Explore the 3S-CL colorimetric analyser, review 3S applications or discuss sample preparation with PMA Support.
Repeatable online water hardness measurement in a compact analyser
The programmed sequence handles the sample and reagents automatically, allowing operators to review water hardness results and analyser status through the integrated touchscreen.
01 / WATER HARDNESS METHOD
Parameter-specific water hardness measurement
The configured 3S-CL runs a parameter-specific wet-chemistry sequence for water hardness, with the exact chemistry and range selected for the sample and monitoring objective.
- Parameter-specific wet-chemistry sequence
- Freely programmable analysis frequency
- Automatic result calculation
02 / AUTOMATIC ROUTINES
Calibration, validation and cleaning
Automatic routines can be scheduled at selectable intervals to support repeatable water hardness monitoring between planned maintenance visits.
- Automatic calibration
- Automatic validation
- Automatic cleaning
Water hardness analyser information
Core 3S-CL information for water hardness method and installation review. The final chemistry, range and sample arrangement should be confirmed for the application.
Flexible installation
Wall or rack mounting is supported in the standard vertical arrangement.
Defined sample handling
A pressure-free sample reservoir presents flow to the analyser.
Process integration
Analog outputs and Modbus RTU RS485 support plant integration.
Operator records
The integrated datalogger supports USB result export.
Designed for practical water hardness monitoring
The 3S separates its electronic and wet compartments while keeping water hardness results, analyser status and configuration accessible through the colour touchscreen.
Touchscreen
Review water hardness results, status information and analyser functions.
Automatic routines
Calibration, validation and cleaning run at selectable intervals.
Separate compartments
Electronic and wet-chemistry sections are physically separated.
Low reagent use
Reagent consumption is confirmed for the selected chemistry and programmed analysis frequency.
Water hardness analyser technical specifications
Core 3S-CL information for specification and application review.
| Measured parameter | Water hardness |
| Measurement principle | Parameter-specific colorimetric method using spectroscopic colour-development measurement |
| Measuring variables | Chemistry and range selected for the approved application |
| Analysis frequency | Approximately 6–20 minutes, depending on the selected parameter and chemistry |
| Power supply | 110–230 VAC, 50/60 Hz, 80 VA; optional 24 VDC |
| Operating conditions | 5–45°C; maximum 85% RH |
| Cabinet and protection | Epoxy-coated stainless steel; IP54 |
| Sample streams | One or two, with further expansion available through an optional sequencer |
| Outputs | 2 × 4–20 mA; Modbus RTU RS485 |
| Automatic functions | Calibration, validation and cleaning |
Parameter-specific chemistry, range and performance should be confirmed against the latest approved 3S documentation before procurement.
Discuss Your Water Hardness Measurement
Tell PMA the hardness measure required, expected range, treatment stage and sample conditions so the correct method can be assessed. Visit PMA, compare the PMA 3S product information, or read how a configurable colorimeter can help reduce operating expenditure.
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