Electrochemical chlorine dioxide sensor CD10.1

for water treatmentmonitoringfor wastewater treatment plants

Overview
Sensor for chlorine dioxide (ClO₂) monitoring based on a membrane-covered amperometric 2-electrode system. Designed for water treatment applications (including seawater), bottle washers and CIP systems. The semipermeable membrane and electrode design provide resistance to surfactants and many chemical interferences, reduce pH dependence and allow reliable measurements across a wide range of water qualities. The sensor delivers fast response, stable readings, low slope drift and requires minimal maintenance.

Applications

• Tap water monitoring
• Chlorine dioxide generators
• Sewage and wastewater treatment
• Pipeline and distribution disinfection
• Food processing: fruit and vegetable disinfection
• General industrial and municipal water treatment

Special features

• Membrane-covered, mechanically robust system
• Tolerant to surfactants
• High chemical tolerance and reduced pH dependency
• Fast response (T90 ≈ 1 min) and stable performance
• Low maintenance and low slope drift (~-1%/month after calibration)
• Suitable for harsh water environments including seawater

Ambient conditions

• Maximum temperature: 50 °C
• Maximum pressure: 1 bar (with retaining ring)

Technical specification
Measurement parameter: Chlorine dioxide (ClO₂)
Measuring ranges: 0.005…0.500 ppm / 0.005…2.000 ppm / 0.05…5.00 ppm / 0.05…10.00 ppm / 0.05…20.00 ppm / 0.5…200.0 ppm
Lower limit of measurement: 0.005 mg/L (depending on electrode)
Resolution: 0.001 / 0.01 / 0.1 ppm (range-dependent)
Response time: T90 ≈ 1 min
Drift: ≈ -1% per month (after calibration at 25 °C, pH 7.2)
pH range: 1.0–12.0 (electrode dependent)
Operating temperature: 0–45 °C
Flow rate (in flow chamber / flow cell): approx. 15–30 L/h
Max. allowable working pressure (without retaining ring): 0.5 bar (no pressure impulses/vibrations)
Max. allowable working pressure (with retaining ring): 1 bar (no pressure impulses/vibrations)
Run-in time: first start-up approx. 1 h
Material: semipermeable membrane, PVC-U, stainless steel 1.4571
Zero point adjustment: not necessary

Model and measurements

• Model: CD10.1
• Measurement: Chlorine dioxide
• Measuring ranges: selectable ranges from 0.005 ppm up to 200.0 ppm
• Lower limit: 0.005 mg/L (electrode dependent)
• Resolution: 0.001 / 0.01 / 0.1 ppm (range-dependent)
• Response time: T90 ≈ 1 min
• Drift: ~-1% per month (after calibration at 25 °C, pH 7.2)
• pH operating range: 1.0–12.0
• Operating temperature: 0–45 °C (ambient)
• Flow rate: 15–30 L/h (flow cell)
• Max. pressure: up to 1 bar (with retaining ring)
• Materials: semipermeable membrane, PVC-U, stainless steel 1.4571
• Zero point adjustment: not necessary