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DULCOTEST® Sensors for Chlorite

Graduated measuring ranges 0.02 – 2 mg/l

Chlorite measurements with DULCOTEST® sensors in disinfection processes involving chlorine dioxide – high process reliability guaranteed.

Product description

Reliable online measurement of chlorite – with DULCOTEST® sensors.

As a by-product of the treatment of water with chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary and in the generation of potable water, chlorite is subject to monitoring requirements in many countries.

Our product line of DULCOTEST® chlorite sensors provides two types of sensor for different measuring ranges to suit your measuring task. When treating potable water previously treated with chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary, the chlorite level must be monitored before the water enters the distribution network to ensure it does not exceed the limit of 0.2 ppm. The sensitivity and precision of sensor type CLT-mA-0.5ppm have been optimised for this measuring task. The suitability of the sensor type for safety-relevant monitoring was confirmed in an independent study by the DVGW, with the measuring method being expressly recommended for this application.

Sensor type CLT-mA-2ppm with a measuring range Defined measurable range within which the errors in a measured variable remain within defined limits. more in the glossary up to 2 ppm is also available for the monitoring of metering processes involving higher chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary concentrations

Your benefits

  • Precise, real-time amperometric measurement for efficient process control
  • Amperometric measuring eliminates interference caused by turbidity or colouration
  • No cross-sensitivity in the presence of chlorine dioxide, chlorine or chlorate
  • High sensitivity for trace measurement in waterworks up to 0.5 ppm (type CLT 1-mA-0.5 ppm)
  • Greater measuring range dynamics of up to 2 ppm for other applications in combination with chlorine dioxide treatment and in particular for checking the quality of chlorine dioxide generators (type CLT 1-mA-2 ppm)
  • Stable zero point means no drift

Technical Details

  • Determination limit for type CLT-mA-0.5ppm < 0.02 mg/l
  • pH range: 6.5 … 9.5
  • Temperature: 1 … 40 º C
  • Pressure max. 1.0 bar
  • Signal outputs: CLT1-mA: 4-20 mA signal, temperature-compensated, uncalibrated, not electrically isolated; CLT1-CAN: digital, temperature-compensated, uncalibrated, electrically isolated.

Chlorite Sensor CLT 1-mA

Sensor for monitoring the disinfection by-product chlorite in compliance with potable water regulations. Without cross-sensitivity towards chlorine dioxide, chlorate and chlorine. For operation on controllers with 4-20 mA input

Your benefits

  • Online monitoring of the disinfection by-product chlorite
  • Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
  • No interference by chlorine dioxide/chlorine/chlorate
  • Online monitoring improves process reliability
  • Online monitoring replaces expensive laboratory analysis

Measured variable

Chlorite anion (ClO2)

Reference method

DPD method, chlorite in the presence of chlorine dioxide

pH-range

6.5…9.5

Cross sensitivity

reducing chemicals, e. g. Fe2+, Mn2+

Temperature

1…40 °C

Max. pressure

1.0 bar

Flow

DGMa, DLG III: 30...60 l/h
BAMa: 5...100 l/h (depending on design)

Supply voltage

16...24 V DC (2-wire)

Output signal

4-20 mA ≈ measuring range, temperature-compensated, uncalibrated, not electrically isolated

Selectivity

Chlorite selective towards chlorine dioxide, chlorate and free chlorine

Process integration

Bypass: open sample water outlet

Sensor fitting

BAMa, DGMa, DLG III

Controllers

D1C

Typical applications

Monitoring of chlorine dioxide treated potable water or similar water. The selective measurement of chlorite alongside chlorine dioxide, chlorine and chlorate is possible.

Resistance to

surfactants

Measuring principle, technology

Amperometric, 2 electrodes, diaphragm-covered

Measuring range

Order no.

CLT 1-mA-0.5 ppm

0.02…0.5 mg/l

1021596

CLT 1-mA-2 ppm

0.10…2.0 mg/l

1021595

Chlorite sensors complete with 50 ml of electrolyte.

Note: A mounting kit (order no. 815079) is required for initial fitting of the chlorite sensors in the in-line probe housing DLG III.

The DT4 photometer is recommended for calibration of the chlorite sensor.

Chlorite Sensor CLT 1-CAN

Sensor for monitoring the disinfection by-product chlorite in compliance with potable water regulations. Without cross-sensitivity towards chlorine dioxide, chlorate and chlorine. For use on controllers with CAN-bus connection

Sensors for connection to a CAN interface (e.g. Disinfection Controller)

Your benefits

  • Online monitoring of the disinfection by-product chlorite
  • Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
  • No interference by chlorine dioxide/chlorine/chlorate
  • Online monitoring improves process reliability
  • Online monitoring replaces expensive laboratory analysis
  • Operation on the CAN-bus with all the associated benefits

Measured variable

Chlorite anion (ClO2)

Reference method

DPD method, chlorite in the presence of chlorine dioxide

pH-range

6.5…9.5

Cross sensitivity

reducing chemicals, e. g. Fe2+, Mn2+

Temperature

1…40 °C

Max. pressure

1.0 bar

Flow

DGMa, DLG III: 30...60 l/h
BAMa: 5...100 l/h (depending on design)

Supply voltage

Via CAN-interface (11 – 30 V)

Output signal

Uncalibrated, temperature compensated, electrically isolated

Response time sensor t90

3 min.

Selectivity

Chlorite selective towards chlorine dioxide, chlorate and free chlorine

Process integration

Bypass: open sample water outlet

Sensor fitting

BAMa, DGMa, DLG III

Controllers

DULCOMARIN®

Typical applications

Monitoring of chlorine dioxide treated potable water or similar water. The selective measurement of chlorite alongside chlorine dioxide, chlorine and chlorate is possible.

Resistance to

surfactants

Measuring principle, technology

Amperometric, 2 electrodes, diaphragm-covered

Measuring range

Order no.

CLT 1-CAN-2 ppm

0.05…2.0 mg/l

1041156

Complete with 100 ml of electrolyte, connecting cable - CAN M12 5-pin 0.5 m, T-distributor M12 5-pin CAN

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Overview

Reliable online measurement of chlorite – with DULCOTEST® sensors.

As a by-product of the treatment of water with chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary and in the generation of potable water, chlorite is subject to monitoring requirements in many countries.

Our product line of DULCOTEST® chlorite sensors provides two types of sensor for different measuring ranges to suit your measuring task. When treating potable water previously treated with chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary, the chlorite level must be monitored before the water enters the distribution network to ensure it does not exceed the limit of 0.2 ppm. The sensitivity and precision of sensor type CLT-mA-0.5ppm have been optimised for this measuring task. The suitability of the sensor type for safety-relevant monitoring was confirmed in an independent study by the DVGW, with the measuring method being expressly recommended for this application.

Sensor type CLT-mA-2ppm with a measuring range Defined measurable range within which the errors in a measured variable remain within defined limits. more in the glossary up to 2 ppm is also available for the monitoring of metering processes involving higher chlorine dioxide Chlorine dioxide is an exceptionally reactive gas, which is not stored due to its instability ... more in the glossary concentrations

Your benefits

  • Precise, real-time amperometric measurement for efficient process control
  • Amperometric measuring eliminates interference caused by turbidity or colouration
  • No cross-sensitivity in the presence of chlorine dioxide, chlorine or chlorate
  • High sensitivity for trace measurement in waterworks up to 0.5 ppm (type CLT 1-mA-0.5 ppm)
  • Greater measuring range dynamics of up to 2 ppm for other applications in combination with chlorine dioxide treatment and in particular for checking the quality of chlorine dioxide generators (type CLT 1-mA-2 ppm)
  • Stable zero point means no drift

Application

Technical Data

Downloads

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