Constant-voltage amperometric measurement
Constant-voltage amperometric analyzer · PDCL-400
Free Chlorine / Chlorine Dioxide Analyzer
A clean-water flow-cell configuration using constant-voltage amperometric measurement and a replaceable 316 stainless-steel electrode.
0–2 / 0–20 mg/LpH 5–830–60 L/h
Model-specific values checked against the supplied sheet
The five products retain separate principles, ranges, sample limitations and interfaces. Final configuration is controlled by the project confirmation document.
01
Measurement method and product highlights
Simple flow-cell electrode structure designed for cleaning and replacement
Manual or automatic temperature compensation
The supplied sheet limits the sample pH to 5–8
02
Verified technical specifications
Confirm the disinfectant, required free or total chlorine result, normal and peak range, sample pH, conductivity, temperature, pressure, flow-cell conditions, calibration method and control interfaces before quotation.
- Measurement principle
- Constant-voltage amperometry
- Measurement ranges
- 0–2 mg/L; 0–20 mg/L optional
- Temperature compensation
- Manual or automatic
- Temperature coefficient
- 2%/°C
- Sample pH
- 5–8
- Required sample flow
- 30–60 L/h
- Operating temperature
- 0–50°C, non-freezing
- Electrode dimensions
- Ø13.5 × 178.5 mm
- Mounting thread
- PG13.5
- Electrode material
- 316 stainless steel conductor
- Cable
- 5 m standard; extendable to 20 m
03
Recommended process fit
Drinking-water treatment
Continuous disinfectant-residual monitoring at plant process and outlet points.
Distribution and secondary supply
Verify residual chlorine through distribution networks and secondary-supply facilities.
Cooling and process water
Support disinfectant control in circulating-water and industrial-water systems.
04
Items to confirm before quotation
Confirm the target and water matrix before choosing DPD colorimetry, constant-voltage amperometry, micro-MEMS or a covered-membrane electrode.
- 01Disinfectant and free chlorine, total chlorine, chlorine dioxide or active-oxygen target
- 02Normal, peak and alarm range plus required detection limit
- 03pH, conductivity, temperature, pressure and sample cleanliness
- 04Flow-cell conditions, calibration, reagent or membrane maintenance
- 05Power, 4–20 mA, relays, Modbus, quantity and destination
05
Project documents available on request
After receiving the operating conditions, we prepare the configured datasheet, flow-cell and mounting confirmation, I/O schedule and quotation. The clean image is not a dimensional drawing.
Get a quote- Configured datasheet→
- Sample and mounting confirmation→
- Cable and I/O schedule→
- Project quotation→
06
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Selection questions
Do all five analyzers use the same measurement method?+
No. CL-201 uses DPD colorimetry; PDCL-400 uses constant-voltage amperometry; PDCL-500M uses a micro-MEMS electrochemical structure; PDCL-700 and PDCL-600 use different membrane-electrode designs.
Can the model be selected only from the range?+
No. Confirm the disinfectant, free or total result, pH, conductivity, temperature, pressure, flow and maintenance method.
Can the product image be used as an installation drawing?+
No. The image provides consistent public presentation. Dimensions, interfaces, accessories and flow cells come from the datasheet and order confirmation.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.