Electrochemical chlorine sensor CP4MA*-AT

for water treatmentfor marine applications4-20 mA

Overview
The German-made CP4MA*-AT total chlorine sensor uses a membrane-covered amperometric potentiostatic 3‑electrode system to measure total chlorine with reduced pH dependence (pH 4–12). Compatible with inorganic chlorinating agents and partially tolerant to surfactants, it is certified ATEX/IECEx for intrinsic safety in Zone 1. The sensor provides automatic temperature compensation, stable long-term performance, 4–20 mA output and requires no zero-point adjustment. Calibration is performed using the DPD-4 method.

Special features

• ATEX and IECEx tested and certified for Zone 1
• partial tolerance to surfactants
• operates at low conductivity
• reduced pH dependence (pH 4–12)
• low maintenance requirement

Applications

• Seawater and vessel ballast water monitoring and control
• Swimming pools, drinking water, service water, process water, sea & brine water

Ambient conditions

• Maximum temperature: 45 °C
• Maximum pressure: 0.5 bar (no pressure impulses or vibrations)

Technical Specification
Measurement parameters: Total Chlorine; pH (optional)
Measuring ranges: 0.005…2.000 ppm / 0.05…5.00 ppm / 0.05…10.00 ppm / 0.05…20.00 ppm
Lower limit of measurement: 0.005 mg/L (depending on electrode)
Resolution: 0.001 mg/L or 0.01 mg/L (depending on range)
Response time: T90 ≈ 2 minutes
Drift: Approximately −1% per month (after calibration at 25 °C and pH 7.2)
pH range: 4.0–12.0 (depending on electrode)
Operating temperature: 0–45 °C
Flow rate (in flow chamber): 15–30 l/h
Nominal pressure: 0.3 bar (no pressure impulses or vibrations)
Max. allowable working pressure: 0.5 bar (no pressure impulses or vibrations)
Run-in time: First start-up approx. 2 h
Material: Microporous hydrophilic membrane; PVC-U; PEEK; stainless steel 1.4571
Zero-point adjustment: Not necessary

Technical characteristics

• Model: CP4MA*-AT
• Measured parameters: Total Chlorine; optional pH
• Measuring ranges: 0.005…2.000 ppm; 0.05…5.00 ppm; 0.05…10.00 ppm; 0.05…20.00 ppm
• Detection limit: 0.005 mg/L (depending on electrode)
• Resolution: 0.001 mg/L or 0.01 mg/L (depending on range)
• Response time: T90 ≈ 2 minutes
• Drift: ≈ −1% per month (after calibration at 25 °C and pH 7.2)
• pH range: 4.0–12.0 (depending on electrode)
• Operating temperature: 0–45 °C
• Flow: approx. 15–30 l/h in flow chamber
• Nominal pressure: 0.3 bar (no pressure impulses/vibrations)
• Max. working pressure: 0.5 bar (no pressure impulses/vibrations)
• Run-in time: approx. 2 h
• Materials: microporous hydrophilic membrane; PVC-U; PEEK; stainless steel 1.4571
• Zero-point adjustment: Not necessary