Reliable online measurement of free (effective) chlorine – with DULCOTEST sensors.
Free chlorine is the most important disinfectant in the world. This term is used to refer to the compounds Cl2 (elementary chlorine), HOCl (hypochlorous acid) and OCl- (hypochlorite).
Our product line of DULCOTEST sensors for free chlorine provides five product ranges optimised for different applications. Each product range consists of several types with different measuring ranges.
The proven diaphragm-covered standard sensor for free chlorine CLE3 is used to monitor or control all types of clear water, for example in the disinfection of potable water. The variant CLE3.1 is especially suitable for an excess of combined chlorine Mono-, di-, trichloroamine. The measuring result of type CLE (free chlorine) is subtracted from the ... more in the glossary, providing the most accurate results in the calculation of combined chlorine Mono-, di-, trichloroamine. The measuring result of type CLE (free chlorine) is subtracted from the ... more in the glossary from the measurement of total chlorine Total of free and combined chlorine. Recommended sensor: Type CTE, reference method DPD4. more in the glossary and free chlorine.
Sensors CLB2 and CLB3 are easy-to-operate, low-cost chlorine sensors without a diaphragm for clear water without pollution.
Sensor CLO1 is particularly suitable for in-line electrolysis Chlorine and sodium hydroxide are produced in-situ in electrolysis by passing an electric ... more in the glossary processes where unwanted compounds may be formed; sensor CLO2 is also ideal for hot water disinfection.
Sensor CBR1 can be used in contaminated water, even for high pH values of up to 9.5, for example in the disinfection of cooling water.
Sensor CLR1 has been optimised for the disinfection or washing of foodstuffs and tolerates contaminated water and chlorine concentrations of up to 1,000 mg/l.
Features and Benefits
- Five different sensor ranges and numerous different versions deliver the following benefits: use with a wide range of water qualities (pH, salinity, temperature, chemical and contamination load), use in combination with many disinfection processes: chlorine gas, sodium hypochlorite, calcium hypochlorite, electrolysis, use in a wide measuring range of 0.01 to 1,000 mg/l.
- Precise, real-time amperometric measurement for efficient process control (short response time)
- Amperometric measuring eliminates interference caused by turbidity or colouration
- Stable zero point
- Integrated temperature compensation eliminates interference caused by influence of temperature
- For sensors with diaphragm-covered measuring electrodes: reduced dependence on flow, substances in water and film-forming media. Diaphragm-covered measuring electrodes embedded in an electrolyte ensure long service life. This maintains optimum measuring conditions regardless of process conditions. Low-cost maintenance thanks to easy diaphragm cap changes.
Technical Details
Free chlorine (hypochlorous acid HOCl)
- CLE 3; pH: 5.5 … 8.0; Temp. 41 … 113 °F (5 … 45 °C)
- CLE3.1; pH: 5.5 … 8.0; Temp. 41 … 113 °F (5 … 45 °C)
- CLO 3; pH: 5.0 … 9.0; Temp. 41 … 113 °F (5 … 45 °C)
- CLO 4; pH: 5.0 … 9.0; Temp. 41 … 158 °F (5 … 70 °C)
- CLB 4; pH: 5.0 … 9.0; Temp. 41 … 113 °F (5 … 45 °C)
- CLB 5; pH: 5.0 … 9.0; Temp. 41 … 113 °F (5 … 45 °C)
- CBR 1; pH: 5.0 … 9.5; Temp. 41 … 113 °F (5 … 45 °C)
- CLR 1; pH: 5.5 … 8.0; Temp. 41 … 113 °F (5 … 45 °C)
Sensor for Free Chlorine CLE 3-mA
Standard sensor for measuring free chlorine in clear water. For operation on controllers with 4-20 mA input
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Diaphragm-covered sensor (encapsulated) minimises faults caused by changing flow or substances in the water
Chlorine sensors complete with 100 ml of electrolyte
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
Sensor for Free Chlorine CLE 3.1-mA
Sensor for the measurement of free chlorine in clear water with higher selectivity towards combined chlorine. For use on controllers with 4-20 mA input
Your Benefits
- Measured variable: free chlorine, no cross-sensitivity to combined chlorine (chloramines), even if there is an excess of it
- Diaphragm-covered sensor (encapsulated) minimises faults caused by changing flow or substances in the water
Chlorine sensors complete with 100 ml of electrolyte
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
Sensor for Free Chlorine CLE 3-DMT
Standard sensor for measuring free chlorine in clear water. For operation on ProMinent transmitters type DMT
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Diaphragm-covered sensor (encapsulated) minimises faults caused by changing flow or substances in the water
Chlorine sensors complete with 100 ml of electrolyte
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
Sensor for free chlorine CLE 3-CAN
Standard sensor for measuring free chlorine in clear water. For use on controllers with CAN-bus connection
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Diaphragm-covered sensor (encapsulated) minimises faults caused by changing flow or substances in the water
- Operation on the CAN-bus with all the associated benefits
Chlorine sensors complete with 100 ml of electrolyte
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
Sensor for free chlorine CLE 3.1-CAN
Sensor for the measurement of free chlorine in clear water with higher selectivity towards combined chlorine. For use on controllers with CAN-bus connection
Your Benefits
- Measured variable: free chlorine, no cross-sensitivity to combined chlorine (chloramines) even if there is an excess of it
- Diaphragm-covered sensor (encapsulated) minimises faults caused by changing flow or substances in the water
- Operation on the CAN-bus with all the associated benefits
Chlorine sensors complete with 100 ml of electrolyte
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
Sensor for free chlorine CLO 3-mA
Sensor for the measurement of free chlorine in clear water, as well as in seawater, and when using electrolysis processes for disinfection, up to 113 °F (45 °C) (14 psi) or 116 psi (77 °F/25 °C). For operation with controllers with 4-20 mA input. Also suitable for use in film-forming water with optional "hydrodynamic cleaning".
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Use when sample water is returned to the process line
- Use at higher pressures
- Avoidance of problems caused by electrolysis systems in which the electrodes are immersed directly into the sample water
- Measurement of free chlorine up to pH 9
- Measurement in seawater possible
- Also suitable for use in film-forming water with optional "hydrodynamic cleaning".
Sensor for free chlorine CLO 3-CAN
Sensor for the measurement of free chlorine in clear water even when using electrolysis processes for disinfection, up to 113 °F (45 °C) (14 psi) or 116 psi (77 °F/25 °C). For use on controllers with CAN-bus connection. Also suitable for use in film-forming water with optional “hydrodynamic cleaning”.
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Use with return of the sample water to the process line
- Use at higher pressures
- Minimisation of faults by electrolysis systems in which the electrodes are immersed directly into the sample water (without diaphragm) by open sensor (no diaphragm) and gold electrodes
- Measurement of free chlorine up to pH 9
- Also suitable for use in film-forming water with optional “hydrodynamic cleaning”.
Sensor for free chlorine CLO 4-mA
Sensor for the measurement of free chlorine in clear water, as well as in seawater, and when using electrolysis processes for disinfection, up to 158 °F (70 °C) or 116 psi (77 °F/25 °C). For operation with controllers with 4-20 mA input. Also suitable for use in film-forming water with optional "hydrodynamic cleaning".
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Use when sample water is returned to the process line
- Use at higher pressures/temperatures
- Avoidance of problems caused by electrolysis systems in which the electrodes are immersed directly into the sample water
- Measurement of free chlorine up to pH 9
- Measurement in seawater possible
- Also suitable for use in film-forming water with optional "hydrodynamic cleaning"
Sensor for free chlorine CLB 4-µA
Cost-effective, simple sensor for the measurement of free chlorine in clear water, also in seawater and with a changing media temperature. Can also be used with electrolysis processes for disinfection at up to 113 °F/43 psi (45 °C/3 bar). For operation with the Compact controller DCCa
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Cost-effective due to its simple construction without separate wear parts
- Simple, cost-effective maintenance without handling of the diaphragm caps
- Avoidance of problems caused by electrolysis systems without a diaphragm in which the electrodes are immersed directly into the sample water
- Measurement of free chlorine up to pH 9 and use at high pressure of up to 43.5 psi thanks to absence of a diaphragm
- Measurement in seawater possible
Sensor for free chlorine CLB 5-µA
Cost-effective, simple sensor for the measurement of free chlorine in clear water, also in seawater and with a constant media temperature. Can also be used with electrolysis processes for disinfection at up to 113 °F/43 psi (45 °C/3 bar). For operation with the Compact controller DCCa
Your Benefits
- Measured variable: free chlorine, no significant cross-sensitivity to combined chlorine (chloramines)
- Cost-effective due to its simple construction without separate wear parts
- Simple, cost-effective maintenance without handling of the diaphragm caps
- Avoidance of problems caused by electrolysis systems without a diaphragm in which the electrodes are immersed directly into the sample water
- Measurement of free chlorine up to pH 9 and use at high pressure of up to 43.5 psi thanks to absence of a diaphragm
- Measurement in seawater possible
Sensor for Free Chlorine CBR 1-mA
Sensor for free chlorine and bromine in contaminated water, also suitable for high pH values of up to 9.5. For use with controllers with 4-20 mA input
Your Benefits
- Measured variable: free chlorine as well as free and combined bromine (bromamines)
- Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
- Resistance to films of dirt and biofilms by electrolyte with antimicrobial effect and large-pore diaphragm
- Use at high pH value of up to 9.5 by optimisation of the electrolyte diaphragm system
Sensor for free and combined bromine CBR 1-CAN
Sensor for free chlorine and bromine in contaminated water, also suitable for high pH values of up to 9.5. For use on controllers with CAN-bus connection.
Your Benefits
- Measured variable: free chlorine as well as free and combined bromine (bromamines)
- Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
- Resistance to films of dirt and biofilms by electrolyte with antimicrobial effect and large-pore diaphragm
- Use at high pH value of up to 9.5 by optimisation of the electrolyte diaphragm system
Sensor for Free Chlorine CLR 1-mA
Sensor for free chlorine above 10 ppm in contaminated washing water for use with controllers with 4-20 mA input
Your Benefits
- Measured variable free chlorine for high concentrations of up to 1,000 ppm
- Diaphragm-covered sensor prevents faults caused by changing flow or ingredients in the water
- Resistance to films of dirt by pore-free diaphragm
Important note: Measuring range from 10.0 ... 1,000 mg/l on request
A mounting kit, order no. 815079, is required for initial fitting of the chlorine sensors in the in-line probe housing DLG III.
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