1. Bromine as a source of disinfection byproducts
During water treatment, especially when using chlorine or ozone for disinfection, bromine can react with chlorine or ozone to form brominated disinfection byproducts. Common brominated disinfection byproducts include bromate (BrO₃⁻) and brominated organic compounds, such as bromoform, which may have adverse effects on human health and the environment. Testing the concentration of bromine in water helps to: monitor the formation of byproducts to avoid exceeding their concentrations; reduce the generation of byproducts by optimizing the disinfection process.
2. Interaction between bromine and chlorine
During the chlorination disinfection process, bromine in water reacts with chlorine to form bromine chlorides (such as chlorobromide), which affect the disinfection effect and may cause the generation of byproducts. Monitoring the bromine concentration in water helps to: ensure the disinfection efficiency of chlorine; understand the effect of bromine on the disinfection process to adjust the amount and contact time of chlorine.
3. Effects of bromine on water quality
The presence of bromide in water has a certain impact on water quality, especially on the chemical properties of water. High concentrations of bromine may affect the pH value, chemical stability and reactivity of water with other substances. Detecting the concentration of bromine helps to assess the overall water quality and take necessary treatment measures.
4. Bromine as an indicator of pollutants
In some cases, bromine is an indicator of certain pollution sources. For example, the discharge of certain industrial wastewater, seawater or substances containing bromide into water bodies will lead to an increase in the concentration of bromine in water. Monitoring the concentration of bromine in water can serve as an early indicator of the presence of pollutants, helping water treatment plants to discover and respond to potential sources of pollution.
5. Impact on water health and ecology
High concentrations of bromine or its compounds may have an impact on aquatic ecosystems. Excessive concentrations of byproducts such as bromate in water may be toxic to aquatic organisms, especially fish and invertebrates. By monitoring the concentration of bromine in water, potential risks to the ecological environment can be assessed and corresponding protective measures can be taken.
6. Regulations and standard requirements
In some countries and regions, bromide and brominated disinfection byproducts in water are strictly regulated, and monitoring the concentration of bromine is an important means to ensure that water quality meets regulatory requirements.
7. Bromine as a substitute in the disinfection process
Bromine is sometimes used as a substitute for disinfectants. In some specific water treatment processes, bromine is used to replace chlorine or in combination with it. For this purpose, testing the bromine concentration in water helps to evaluate its disinfection effect and safety, and ensure the reliable operation of the water treatment system.
The BR1MA bromine sensor uses a three-electrode system to measure free bromine (HOBr) and 1-bromo-3-chloro-5,5-dimethylhydantoin (BCDMH). It is used in swimming pools, drinking water, service, process and seawater. It reduces pH dependence, tolerates surfactants, and has a pressure resistance of 0.5 bar.
Technical Data
1. BR1 (analog output, analog internal signal processing)
A potential-free electrical connection is necessary as the sensor electronic is not equipped with a galvanical isolation.
| 
| Measuring range in ppm | Resolution in ppm | Output Output resistance | Nominal slope (at pH 7.2) in mV/ppm | Voltage supply | Connection |
| BR1H-M12 | 0.005…2.000 | 0.001 | analog 0…-2000 mV 1 kΩ | -1000 | ±5 - ±15 VDC 10 mA | 5-pole M12 plug-on flange Function of wires: PIN1: measuring signal PIN2: +U PIN3: -U PIN4: signal GND PIN5: n. c. |
| BR1N-M12 | 0.05…20.00 | 0.01 | -100 |
(Subject to technical changes!)
2. BR1 (analog output, digital internal signal processing) analog-out / digital
- The power supply is galvanically isolated inside of the sensor.
- The output signal is galvanically isolated too, that means potential-free.
|
| Measuring range in ppm | Resolution in ppm | Output Output resistance | Nominal Slope (at pH 7.2) in mV/ppm | Power supply | Connection |
| BR1H-An-M12 | 0.005…2.000 | 0.001 | analog 0…-2 V (max. -2.5 V) 1kΩ | -1000 | 9-30 VDC approx. 20-56 mA | 5-pole M12 plug-on flange Function of wires: PIN1: measuring signal PIN2: +U PIN3: power GND PIN4: signal GND PIN5: n. c. |
| BR1N-An-M12 | 0.05…20.00 | 0.01 | | -100 |
| BR1H-Ap-M12 | 0.005…2.000 | 0.001 | analog 0…+2 V (max. +2.5 V) 1kΩ | +1000 |
| BR1N-Ap-M12 | 0.05…20.00 | 0.01 | | +100 |
(Subject to technical changes!)
3. BR1 (digital output, digital internal signal processing)
- The power supply is galvanically isolated inside of the sensor.
- The output signal is galvanically isolated too, that means potential-free.
|
| Measuring range in ppm | Resolution in ppm | Output Output resistance | Power supply | Connection |
| BR1H-M0c | 0.005…2.000 | 0.001 | Modbus RTU There are no terminating resistors in the sensor. | 9-30 VDC approx. 20-56 mA | 5-pole M12 plug-on flange Function of wires: P IN1: reserved PIN2: +U PIN3: power GND PIN4: RS485B PIN5: RS485A |
| BR1N-M0c | 0.05…20.00 | 0.01 |
(Subject to technical changes!)
4. BR1 4-20 mA (analog output, analog internal signal processing)
A potential-free electrical connection is necessary as the sensor electronic is not equipped with a galvanical isolation.
4.1 Electrical connection: 2 pole terminal clamp
|
| Measuring range in ppm | Resolution in ppm | Output Output resistance | Nominal slope (at pH 7.2) in mA/ppm | Voltage supply | Connection |
| BR1MA-2 | 0.005 … 2.000 | 0.001 | analog 4…20 mA uncalibrated | 8.0 | 12…30 VDC RL = 50Ω (12V)… 900Ω (30V) | 2-pole terminal (2 x 1 mm²) Recommended: Round cable φ 4 mm 2 x 0.34 mm² |
| BR1MA-5 | 0.05 … 5.00 | 0.01 | 3.2 |
| BR1MA-10 | 0.05 … 10.00 | 0.01 | 1.6 |
| BR1MA-20 | 0.05 … 20.00 | 0.01 | 0.8 |
(Subject to technical changes!)
4.2 Electrical connection: 5 pole M12 plug-on flange
|
| Measuring range in ppm | Resolution in ppm | Output Output resistance | Nominal slope (at pH 7.2) in mA/ppm | Voltage supply | Connection |
| BR1MA-2-M12 | 0.005 … 2.000 | 0.001 | analog 4…20 mA uncalibrated | 8.0 | 12…30 VDC RL = 50Ω (12V)… 900Ω (30V) | 5-pole M12 plug-on flange Function of wires: PIN1: n. c. PIN2: +U PIN3: -U PIN4: n c. PIN5: n. c. |
| BR1MA-5-M12 | 0.05 … 5.00 | 0.01 | 3.2 |
| BR1MA-10-M12 | 0.05 … 10.00 | 0.01 | 1.6 |
| BR1MA-20-M12 | 0.05 … 20.00 | 0.01 | 0.8 |
(Subject to technical changes!)
Spare Parts
| Type | Membrane cap | Electrolyte | Emery | O-ring |
| All BR1 | M48.2 Art. No. 11047 | ECP1.4/GEL, 100 ml Art. No. 11006.1 | S1 Art. No. 11908 | 14 x 1.8 NBR Art. No. 11806 |
(Subject to technical changes!)
