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 production 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 measurement task. In the treatment of 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
Field of application
The following list of applications are general examples of generally suitable applications for this product. Please contact your local sales representative to talk about the applicable use of this product in your specific case / environment.
- Potable water treatment: all stages in which chlorine dioxide is used for oxidation or disinfection.
- Use of chlorine dioxide
- Disinfection with chlorine dioxide in the food and beverage industry
Technical Details
- Determination limit for type CLT-mA-0.5ppm < 0.02 mg/l
- pH range: 6.5 … 9.5
- Temperature: 1 … 40 °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, DAC, diaLog X |
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
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 3, DULCOMARIN II only with hardware after 06/02/2014 from software version 3035 or later |
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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