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 potable water generation, 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. 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 means no clouding or discolouration
- 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 up to 2 ppm for other applications in combination with chlorine dioxide treatment and particularly for quality inspection of chlorine dioxide generators (type CLT 1-mA-2 ppm)
- Stable zero point means no drift
Technical Details
- Evaluation limit of type CLT-mA-0.5ppm < 0.02 mg/l
- pH range: 6.5 … 9.5
- Temperature: 1º … 40º 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 |
| Intake flow | 30…60 l/h (in DGM or DLG III) |
| Supply voltage | 16...24 V DC (two-wire technology) |
| Output signal | 4…20 mA ≈ measuring range, temperature-compensated, uncalibrated, not electrically isolated |
| Selectivity | Chlorite selective towards chlorine dioxide, chlorate and free chlorine |
| Installation | Bypass: open sample water outlet |
| Sensor fitting | DGM, DLG III |
| Measuring and control equipment | D1C, DAC |
| 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, membrane-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 together with 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 |
| Intake flow | 30…60 l/h (in DGM or DLG III) |
| 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 |
| Installation | Bypass: open sample water outlet |
| Parts number/Identity code | DGM, DLG III |
| Measuring and control equipment | DULCOMARIN® |
| Typical applications | Monitoring of potable water or similar water treated with chlorine dioxide. Selective measurement of chlorite and chlorine dioxide, chlorine and chlorate is also possible. |
| Resistance to | surfactants |
| Measuring principle, technology | Amperometric, 2 electrodes, membrane-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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