V2.00/EN/00685215
Page 1/9Data Sheet 202637
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20263700T10Z001K000
JUMO tecLine Br
Sensor for bromine
Brief description
The disinfectant bromine offers a greater disinfectant effect and higher pH value compared with
chlorine compounds, while having a low corrosive effect. Abreacted bromine solutions irritate the
mucous membranes to a lesser extent and have a neutral odor.
The membrane-covered, amperometric sensor works on the 3-electrode principle; it is used for
online measurement hypobromous acid (HOBr). Suitable bromination methods include free bro-
mine (HOBr) as well as 1-bromine-3-chlorine-5.5-dimethyl-hydantoin (BCDMH).
Depending on the type, the electronics integrated in the sensors provide a temperature-compen-
sated current signal (4 to 20 mA) or a Modbus RTU output signal. A downstream device (indica-
tor, controller, recorder, PLC, etc.) is used for calibration.
The sensor can be connected directly to indicating devices/transmitters/controllers (see "Trans-
mitters/controllers for sensors with an output signal of 4 to 20 mA (type 202637/61) ", page 7).
They supply the sensor with voltage and allow for easy calibration of the measuring system.
The sensor is not suitable for detecting the absence of bromine.
Application areas: measurements in cooling water, swimming pool water, service water,
process water, seawater.
Type 202637/61 Output signal 4 to 20 mA
Type 202637/71 Output signal digital interface
Type 202637/71...
Application example
Additional indicating devices/controllers: "Transmitters/controllers for sensors with an output sig-
nal of 4 to 20 mA (type 202637/61) ", page 7
Voltage supply
from JUMO
dTRANS AS 02
Outputs*:
Example:
Indicator/controller for standard signals
JUMO dTRANS AS 02
* Possible combinations
s 2025ee data sheet 53
Relay outputs
Binary outputs
Calibrated analog outputs
(free chlorine, chlorine dioxide,
ozone, 0(4) to 20 mA / 0 to 10 V,
galvanically isolated)
Interfaces
(Modbus, PROFIBUS-DP,
data logger)
U c atedn alibr
sensor signal
(4 20 mA)to
JUMO combination fitting
with sensor
Special features
• 3-electrode principle
• Easy calibration
• Integrated temperature compensation
• Proven measuring system
• Electrical connection analog or
digital
• Connection to JUMO digiLine system
optional
V2.00/EN/00685215
Page 2/9Data Sheet 202637
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20263700T10Z001K000
Important information
Notes for all types
• Measuring is only possible in a suitable flow fitting (see accessories).
• The flow rate from the measurement medium must be at least 15 cm/s (0.5 l/min) in order for the sensor to work correctly. The minimum inflow
can be guaranteed using the JUMO combination fitting or the JUMO individual fitting in connection with the JUMO flow monitor for disinfectant
measurands (see accessories).
• For calibration, a test set is required to determine the bromine content. Determination methods that can potentially be used include DPD-1
(for free bromine) or DPD-4 (for bromine from BCDMH).
• To make sure the sensor works correctly, only one disinfectant should be used at a time.
• In particular cases, it must be checked if the presence of surfactants will cause a significant reduction in the service life of sensors with hy-
drophilic membranes; however, in these cases the measurement medium must also have qualities similar to drinking or swimming pool water.
• The output signal from this sensor is independent of the pH value to a great extent in a range between pH 6.5 and 9.5.
• To ensure that the sensor functions correctly, the measurement medium must have a conductivity of at least 10 μS/cm.
• For more details on the structure and uses of the amperometric sensors, please refer to our technical literature "Analysis Measuring Technol-
ogy in Liquid Media".
Notes for type 202637/61 (output signal 4 to 20 mA)
• The slope of these sensors can vary depending on the manufacture and application by between 65 % and 150 % of the nominal slope. To
determine the appropriate measuring range or appropriate sensor, it is therefore recommended that the concentration to be measured be
multiplied by a factor of 1.5.
Example: concentration to be measured 1.6 ppm × factor 1.5 = 2.4 ppm => recommended sensor with measuring range 5 ppm
Required components for a measuring point
The following components are required to set up a measuring point for measuring bromine:
• amperometric sensor, membrane-covered
• transmitter /controller
• flow monitor (optional extra, recommended)
• fitting for membrane-covered sensors