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Two-Wire 4-20mA Bromine Sensor For Swimming Pools Drinking Water And Sea Water

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Two-Wire 4-20mA Bromine Sensor For Swimming Pools Drinking Water And Sea Water

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Brand Name :	Daruifuno
Model Number :	BR1MA
Certification :	CE, ISO
Price :	Negotiable
Payment Terms :	T/T
Delivery Time :	1-45 work days

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Two-Wire 4-20mA Bromine Sensor For Swimming Pools Drinking Water And Sea Water

Two-wire 4-20mA bromine sensor for swimming pools drinking water and sea water

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.

Two-Wire 4-20mA Bromine Sensor For Swimming Pools Drinking Water And Sea Water

Specifications

	BR1
Indicator	Bromine
Application	Drinking water, swimming pool water, service water, process water, sea water
Bromine agents	Free bromine (HOBr) 1-Bromo-3-chloro-5.5-dimethyl-hydantoin (BCDMH)
Measuring system	Membrane covered, amperometric potentiostatic 3-electrode system
Electronic	Analog version: - voltage output - not galvanically isolated electronics - analog internal data processing - output signal: analog (analog-out/analog) Digital version: - electronic is completely galvanically isolated - digital internal data processing - output signal: analog (analog-out/digital) or digital (digital-out/digital) mA-version: - current output analog - not galvanically isolated electronics - output signal: analog (analog-out/analog)
Information about the measuring range	The actual slope of a sensor can vary production-related between 65% and 150% of the nominal slope Note: With a slope > 100% the measuring range is reduced accordingly. (Ex.: 150% slope → 67% of the specified measuring range)
Working temperature	Measuring water temperature: 0 … +45 °C (no ice crystals in the measuring water)
Working temperature	Ambient temperature: 0 … +55 °C
Temperature compensation	Automatically, by an integrated temperature sensor Sudden temperature changes must be avoided
Max. allowed working pressure	Operation without retaining ring: - 0.5 bar - no pressure impulses and/or vibrations
Max. allowed working pressure	Operation with retaining ring in flow cell: - 0.5 bar, - no pressure impulses and/or vibrations (see option 1)
Flow rate (Incoming flow velocity)	Approx. 15-30 L/h (33 – 66 cm/s) in flow cell
pH-range	pH 6.5 – pH 9.5, highly reduced dependence on pH – value (see diagram last page “relative dependence on pH”)

	BR1
Run-in time	First start-up approx. 2 h
Response time	T90: approx. 2 min
Zero point adjustment	Not necessary
calibration	At the device, by analytical determination of the bromine concentration Recommendation depending on bromine agent: - Free bromine DPD1 - method - BCDMH DPD4 - method
Cross sensitivities/ interferences	Cl2: is also measured ClO2: is also measured O3: is also measured Corrosion inhibitors can lead to measuring errors. Stabilisers for water hardness can lead to measuring errors.
Absence of the disinfectant	Max. 24 h
Connection	mV version: 5-pole M12, plug-on flange Modbus version: 5-pole M12, plug-on flange 4-20 mA version: 2-pole terminal or 5-pole M12, plug-on flange
Max. length of sensor cable (depending on internal signal processing)	Analog	< 30 m
	Digital	> 30 m are permissible Maximum cable length depends on application
Protection type	5-pole M12 plug-on flange: IP68 2-pole terminal with mA- hood: IP65
Material	Microporous hydrophilic membrane, PVC, PEEK ,stainless steel 1.4571
Size	Diameter: approx. 25 mm Length: mV version: approx. 190 mm (analog signal processing) approx.. 205 mm (digital signal processing) Modbus version: approx. 205 mm 4-20 mA version: approx. 220 mm (2-pole-terminal) approx. 190 mm (5-pole-M12)
Transport	+5 … +50 °C (Sensor, electrolyte, membrane cap)

	BR1
Storage	Sensor: dry and without electrolyte no limit at +5 … +40 °C
	Electrolyte: in original bottle protected from sunlight at +5 … +35 °C min. 1 year or until the specified EXP-Date
	Membrane cap: in original packing no limit at +5 … +40 °C (used membrane caps can not be stored)
Maintenance	Regularly control of the measuring signal, min. once a week The following information highly depends on the water quality: Change of the membrane cap: once a year Change of the electrolyte: every 3 - 6 months

Option 1: Retaining ring

- When operating with pressures >0.5 bar in flow cell

- Dimensions retaining ring 29 x 23.4 x 2.5 mm, slitted, PETP

- Different positions for groove selectable (on request)

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

Art. No. 11908

14 x 1.8 NBR

Art. No. 11806

(Subject to technical changes!)

Two-Wire 4-20mA Bromine Sensor For Swimming Pools Drinking Water And Sea Water

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