Online Free and Total Chlorine Analyser
Select a free- or total-chlorine configuration to support continuous treatment oversight.
Online Free and Total Chlorine Analyser with 3S
Free and total chlorine measurements support disinfection control and treated-water monitoring where a programmed colorimetric method is appropriate. The 3S-CL manages the sample, reagents, reaction sequence and optical reading automatically, helping operators review results from the integrated touchscreen.
Free chlorine and total chlorine answer different operational questions, so the required measurand, range and sample point must be clear at the outset. PMA can also review sample pressure, flow, conditioning and the maintenance implications of the selected application. Explore the 3S-CL colorimetric analyser, review 3S applications or discuss sample preparation with PMA Support. For site-level decisions, see chlorine residual monitoring in drinking water.
Repeatable online free and total chlorine measurement in a compact analyser
The programmed sequence handles the sample and reagents automatically, allowing operators to review free and total chlorine results and analyser status through the integrated touchscreen.
01 / FREE AND TOTAL CHLORINE METHOD
Parameter-specific free and total chlorine measurement
The configured 3S-CL runs a parameter-specific wet-chemistry sequence for free and total chlorine, 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 free and total chlorine monitoring between planned maintenance visits.
- Automatic calibration
- Automatic validation
- Automatic cleaning
Free and total chlorine analyser information
Core 3S-CL information for free and total chlorine 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 free and total chlorine monitoring
The 3S separates its electronic and wet compartments while keeping free and total chlorine results, analyser status and configuration accessible through the colour touchscreen.
Touchscreen
Review free and total chlorine 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.
Free and total chlorine analyser technical specifications
Core 3S-CL information for specification and application review.
| Measured parameter | Free and total chlorine |
| 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 Free and Total Chlorine Measurement
Tell PMA whether free or total chlorine is required, together with the expected range, sample-point conditions and monitoring objective. Visit PMA, compare the PMA 3S product information, or read how a configurable colorimeter can help reduce operating expenditure.
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