DULCOTEST CDE

Summary

Product Identification

DULCOTEST® Sensors for Chlorine Dioxide

Product Ranges

• CDE: For clear water, e.g., disinfection of potable water.
• CDP: For rapid control of chlorine dioxide content, e.g., in bottle-washing systems, with surfactants and rapid temperature changes.
• CDR: For polluted waters, e.g., raw water for potable water generation, cooling water, and wastewater.

CDE 2-mA Chlorine Dioxide Sensor

Standard sensor for measurement of chlorine dioxide without cross-sensitivity to free chlorine. Designed for controllers with 4-20 mA input.

CDP 1-mA Chlorine Dioxide Sensor

Sensor for fast response time chlorine dioxide measurement, suitable for bottle-washing systems. Designed for controllers with 4-20 mA input. Requires external temperature compensation.

CDR 1-mA Chlorine Dioxide Sensor

Sensor for chlorine dioxide measurement in all water types, including hot and contaminated water, without cross-sensitivity to free chlorine. Designed for controllers with 4-20 mA input.

CDR 1-CAN Chlorine Dioxide Sensor

Sensor for chlorine dioxide measurement in all water types, including hot and contaminated water, without cross-sensitivity to free chlorine. Designed for connection to a CAN interface.

Operating Limits

CDE 2-mA

• Temperature: 5 … 45 °C
• Max. pressure: 1.0 bar
• Intake flow: 30…60 l/h (in DGM or DLG III)
• pH range: 4.0 … 11.0

CDP 1-mA

• Temperature: 10 … 45 °C
• Max. pressure: 3.0 bar
• Intake flow: 30…60 l/h
• pH range: 5.5 … 10.5

CDR 1-mA

• Temperature: 1 … 55 °C (short-term 60 °C)
• Max. pressure: 3.0 bar (at 30°C, in the DGMa)
• Intake flow: 30…60 l/h (in DGM or DLG III)
• pH range: 1.0 … 10.0

CDR 1-CAN

• Temperature: 5 … 45 °C
• Max. pressure: 1.0 bar
• Intake flow: 30…60 l/h (in DGM or DLG III)
• pH range: 1.0 … 10.0

Feed Water

CDE 2-mA

• Resistance to: Salts, acids, alkalis. Not surfactants.
• Typical applications: Uncontaminated drinking water (surfactant-free).

CDP 1-mA

• Resistance to: Surfactants, slight films of dirt.
• Typical applications: Process water containing surfactants (bottle washing machines).

CDR 1-mA & CDR 1-CAN

• Resistance to: Surfactants, slight films of dirt, water-soluble chemicals, solids/dirt, biofilms.
• Typical applications: Contaminated industrial/process water, surfactant-containing, cooling water, irrigation water, slightly contaminated wastewater, warm water.

Product Water

Measured Variable

• Chlorine dioxide (ClO₂)

Selectivity

• CDE 2-mA: Chlorine dioxide selective towards free chlorine, chlorite and chlorate.
• CDP 1-mA: Chlorine dioxide as against chlorite and chlorate.
• CDR 1-mA & CDR 1-CAN: Chlorite.

Cross Sensitivity

• CDE 2-mA, CDR 1-mA & CDR 1-CAN: Ozone.
• CDP 1-mA: Ozone, chlorine.

Measuring Principle

• Amperometric, 2 electrodes, membrane-covered.

Electrical

Supply Voltage

• CDE 2-mA, CDP 1-mA, CDR 1-mA: 16...24 V DC (two-wire technology)
• CDR 1-CAN: Via CAN interface (11-30 V)

Output Signal

• CDE 2-mA, CDP 1-mA, CDR 1-mA: 4…20 mA (uncalibrated, not electrically isolated)
• CDR 1-CAN: Uncalibrated, electrically isolated.

CDE 2-mA Specifics

• Output signal is temperature-compensated.
• Response time sensor t90: 120 s

CDP 1-mA Specifics

• Output signal is not temperature-compensated. Requires separate temperature measurement for compensation.
• Response time sensor t90: 60 s

CDR 1-mA Specifics

• Output signal is temperature-compensated.
• Response time sensor t90: 3 min.

CDR 1-CAN Specifics

• Output signal is temperature-compensated.
• Response time sensor t90: 3 min.

Mechanical / Hydraulic

Sensor Fitting

• DGM, DLG III (DLG II for CDP 1-mA). A mounting kit (order no. 815079) is required for initial fitting in the DLG III in-line probe housing.

Installation

• Bypass: open sample water outlet.

Measuring Ranges (mg/l)

• CDE 2-mA:
  • 0.01…0.5 ppm
  • 0.02…2.0 ppm
  • 0.10…10.0 ppm
• CDP 1-mA:
  • 0.02…2.0 ppm
• CDR 1-mA:
  • 0.01…0.5 ppm
  • 0.02…2.0 ppm
  • 0.10…10.0 ppm
• CDR 1-CAN:
  • 0.01…10.0 mg/l

CDR 1-CAN Specifics

• Includes 100 ml electrolyte, connecting cable (CAN M12 5-pin 0.5 m), T-distributor (M12 5-pin CAN).

Disclaimer: Extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror