Reliable online measurement of bromine – with DULCOTEST sensors
Bromine compounds are an increasingly popular alternative to chlorine compounds in water disinfection in spite of the higher costs of the reagents.
Bromine has a number of advantages over chlorine compounds when it comes to disinfection:
- More effective disinfection at higher pH values.
- Lower volatility at higher temperatures.
- Less tendency to corrosion.
- Bromine compounds that have finished reacting (combined bromine) produce less odour and irritation of the mucous membranes.
Our product line of DULCOTEST bromine sensors provides three types of sensor for your measurement tasks.
Sensor types CBR1-mA and BCR1-mA are resistant to contaminated water and are designed for the treatment of cooling water. Type CBR1 is specifically designed for free bromine from inorganic bromination processes, e.g. sodium bromide + sodium hypochlorite, or the use of BrCl.
Sensor type BCR1-mA is optimised for the measurement of organic bromination agents (e.g. BCDMH).
Sensor type BRE3-CAN is available for the measuring and control system DULCOMARIN for treating swimming pool water with BCDMH.
Your benefits
- Precise, real-time amperometric measurement for efficient process control (short response time).
- Suitable for a very wide range of water qualities (contamination, pH, salinity, temperature).
- Amperometric measuring eliminates interference caused by turbidity or colouration.
- Stable zero point means no drift.
- Integrated temperature compensation eliminates interference caused by influence of temperature.
- Diaphragm-covered electrodes for reduced dependence on flow, substances in water and film-forming media.
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.
- Water disinfection in cooling towers
- Water disinfection in swimming pools and hot tubs
- Disinfection of seawater
Technical Details
Measurement of all common bromine reagents used for disinfection possible:
- inorganic free bromine, e.g. using the ACTI bromine process: HOBr, or inorganically bound bromine (proprietary names include Stabrex®)
- DBDMH (1,3-dibromo-5,5-dimethylhydantoin), proprietary names include Albrom 100®
- BCDMH (1-bromo-3-chloro-5,5-dimethylhydantoin), proprietary names include Brom-Sticks®
Sensor for Total Available Bromine BCR 1-mA (Replaces Earlier Type BRE 1)
Sensor for the disinfectant BCDMH and other oxidative-acting bromine-organic disinfectants and total chlorine even in contaminated water and/or for high pH values of up to 9.5. For use on controllers with mA input
Your Benefits
- Measured variable: total available bromine from BCDMH (1-bromo-3-chloro-5,5-dimethylhydantoin)
- Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water, N-bromamide sulfonate
- Resistance to blocking is achieved by the use of an electrolyte with an antimicrobial effect (less blocking by biofilms) and by a large-pored diaphragm (less blocking by solid particles/dirt)
- Use with high pH values by optimisation of the electrolyte diaphragm system
Measured variable | Total available bromine from BCDMH (1-bromo-3-chloro-5,5-dimethylhydantoin) and N-bromamido-sulphonate, total chlorine |
Reference method | DPD4 |
pH-range | 5.0…9.5 |
Temperature | 5…45 °C |
Max. pressure | 1.0 bar |
Flow | DGMa, DLG III: 60...80 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 | Non-selective, cross-sensitive towards many oxidation agents |
Disinfection process | BCDMH (1-bromo-3-chloro-5,5-dimethyl-hydantoin), N-bromamide sulfonate |
Process integration | Bypass: open sample water outlet |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | D1C, DAC, AEGIS II, AEGIS X |
Typical applications | Cooling water, process water, wastewater, swimming pool water, water with higher pH values (stable pH). |
Resistance to | Dirt films, biofilms, surfactants |
Measuring principle, technology | Amperometric, 2 electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
BCR 1-mA-0.5 ppm | 0.01…0.5 mg/l | 1041697 |
BCR 1-mA-2 ppm | 0.02…2.0 mg/l | 1040115 |
BCR 1-mA-10 ppm | 0.10…10.0 mg/l | 1041698 |
Sensor for total available bromine BRE 3-CAN
Sensor for free and combined bromine, also for use with slightly contaminated water. For use on controllers with CAN-bus connection
Your Benefits
- Measured variable: total available bromine from BCDMH and other oxidative-acting bromine organic disinfectants
- Diaphragm-covered sensor minimises faults caused by changing flow or ingredients in the water
- Use with high pH values by optimisation of the electrolyte diaphragm system
- Operation on the CAN-bus with all the associated benefits
Measured variable | Total available bromine |
Reference method | For DBDMH, free bromine: DPD1. For BCDMH: DPD4 |
pH dependence | If the pH changes from pH 7 to pH 8, the sensor sensitivity changes
a) for DBDMH and free bromine by around 10 %
b) for BCDMH by around 25 % |
Temperature | 5…45 °C |
Max. pressure | 3.0 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 |
Selectivity | Non-selective, cross-sensitive towards many oxidation agents |
Disinfection process | DBDMH (1,3-dibromo-5,5-dimethyl-hydantoin), BCDMH (1-bromo-3-chloro-5,5-dimethyl-hydantoin), free bromine (HOBr, OBr-) |
Process integration | Bypass: open sample water outlet |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | DULCOMARIN |
Typical applications | swimming pools/whirlpools. |
Resistance to | surfactants |
Measuring principle, technology | Amperometric, 2 electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
BRE 3-CAN-10 ppm | 0.02…10.0 mg/l | 1029660 |
Note: a mounting kit (order no. 815079) is required for initial fitting of the bromine sensors in the in-line probe housing DLG III.
Sensor for Free and Combined Bromine CBR 1-mA (Replaces Earlier Type BRE 2)
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
Measured variable | free chlorine, free bromine, combined bromine, DBDMH (1,3-dibrom-5,5-dimethyl-hydantoin) |
Reference method | DPD1 |
pH-range | 5…9.5 |
Temperature | 1…40 °C |
Max. pressure | 1.0 bar |
Flow | DGMa: 20...80 l/h
DLG III: 40...100 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 | Free chlorine as against combined chlorine |
Disinfection process | Chlorine gas, hypochlorite, electrolysis with diaphragm, bromide + hypochlorite, DBDMH |
Process integration | Bypass: open sample water outlet |
Sensor fitting | BAMa, DGMa, DLG III |
Controllers | D1C, DAC, AEGIS II, AEGIS X |
Typical applications | Cooling water, process water, wastewater, water with higher pH values (stable pH), contaminated swimming pool water. In swimming pools to determine the combined chlorine from the difference: Total chlorine minus free chlorine. Raw water for drinking water treatment. |
Resistance to | Salts, acids, alkalis, surfactants, dirt films |
Measuring principle, technology | Amperometric, 2 electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
* Measuring range based on chlorine. When measuring bromine, the lower and upper limit of the measuring range are increased by the factor 2.25, therefore for example CBR 1-mA-0.5ppm: 0.02 ...1.1 ppm. |
CBR 1-mA-0.5 ppm | 0.01…0.5 mg/l * | 1038016 |
CBR 1-mA-2 ppm | 0.02…2.0 mg/l * | 1038015 |
CBR 1-mA-5 ppm | 0.05…5.0 mg/l * | 1052138 |
CBR 1-mA-10 ppm | 0.10…10.0 mg/l * | 1038014 |
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
Measured variable | free chlorine, free bromine, combined bromine, DBDMH (1,3-dibrom-5,5-dimethyl-hydantoin) |
Reference method | DPD1 |
pH-range | 5…9.5 |
Temperature | 1…40 °C |
Max. pressure | 1.0 bar |
Flow | DGMa: 20...80 l/h
DLG III: 40...100 l/h
BAMa: 5...100 l/h (depending on design) |
Supply voltage | 11…30 V DC (via CAN interface) |
Output signal | Digital (CANopen), uncalibrated, temperature-compensated, electrically isolated |
Selectivity | Free chlorine as against combined chlorine |
Disinfection process | Chlorine gas, hypochlorite, electrolysis with diaphragm, bromide + hypochlorite, DBDMH |
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 | Cooling water, process water, wastewater, water with higher pH values (stable pH), contaminated swimming pool water. In swimming pools to determine the combined chlorine from the difference: Total chlorine minus free chlorine. Raw water for drinking water treatment. |
Resistance to | Dirt films, biofilms, surfactants |
Measuring principle, technology | Amperometric, 2 electrodes, diaphragm-covered |
| Measuring range | Order no. |
|---|
CBR 1-CAN-10 ppm | 0.01…10.0 mg/l | 1122056 |
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