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Page 1/5Data Sheet 202931
20293100T10Z001K000
JUMO BlackLine CR 4P
Conductive four-electrode conductivity sensor
Brief description
The JUMO BlackLine CR 4P acquires the electrolytic conductivity of a measuring liquid accord-
ing to the conductive four-electrode measuring principle. When combined with a suitable trans-
mitter, precise measurements over a broad measuring range from 1 µS/cm to 300 mS/cm are
ensured. A temperature probe which is integrated into the sensor (either Pt100 or Pt1000) simul-
taneously acquires the temperature of the measuring liquid.
Compared to 2-electrode sensors, this sensor offers a multitude of application-based advantag-
es in the field and in the lab, and can be used both for measuring purified water and for deter-
mining ion concentrations in salty, acidic and alkaline media.
The sensor shaft is made from robust PPE, and a high-quality, abrasion-resistant special graph-
ite is used for the electrode material. All of the materials used are physiologically safe.
The tried-and-tested design, with a 120-mm insertion length, 12-mm shaft diameter and the stan-
dardized Pg 13.5 process connection, enables easy installation in commercially available fit-
tings, and means that this conductivity sensor can be used, for example, with conventional pH
and redox electrodes in corresponding combination fittings.
The sensor is also particularly suited for connection to hand-held and laboratory measuring de-
vices.
Application
• General water technology
• Environmental technology
• Industrial process water
• Horticultural technology
• Fish breeding, aquaristics, aquaponics
• Salt concentration measurement
• Laboratory use
Special features
• Wide measuring range
(1 µS/cm to 300 mS/cm)
• Suitable for both low and high conductivity
• Reliable and precise measurements
• Reduced sensitivity to pollutants
• No measurement uncertainty resulting from polarization effects
• For universal use
Type 202931/10...
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Technical data
Suitable transmitters
The sensor is suitable for being connected to the following transmitters:
Measuring principle for conductivity Conductive, 4-electrode measurement
Cell constant
a
K = 0.25
Typical measuring range
b
1 µS/cm to 300 ms/cm
Temperature sensor Either Pt100 or Pt1000 (both at least class A)
Response time t
90
c
<96s
Process connection Screw connection Pg 13.5
Materials
d
Sensor body PPE, PS
Electrodes Special graphite
Admissible temperature of medium -5 to +80 °C
Admissible process pressure 6 bar at 80 °C
Protection type
e
IP65 and IP67
Electrical connection Either securely connected cable, 5 m long, with tin-plated wire ends, or M12 connector
a
The cell constant can differ by 10 % of the nominal value depending on manufacturing. This deviation can be equalized on the transmitter.
b
The measuring range also depends on the transmitter being used.
c
DIN EN 60751.
d
Please also refer to the dimensional drawings for the sensors.
e
Valid for the electrical connection.
Type Features Data sheet
JUMO dTRANS CR 02 Modular, compact multichannel transmitter and controller with backlit graphic display for conduc-
tivity in the panel housing or surface-mounted housing, 1 main input, 1 analog input, 2 digital in-
puts, other inputs via optional boards; up to 3 analog outputs, up to 7 relays
202552
JUMO AQUIS 500 CR Transmitter and controller with backlit graphic display for conductivity, 2 analog outputs, 2 relays
with changeover contacts, comprehensive controller and switching functions
202565
JUMO AQUIS touch P/S Modular multichannel measuring devices for liquid analysis with integrated controller and paper-
less recorder, USB host, USB device, Modbus, PROFIBUS DP, and Ethernet using optional boards
202580 and
202581
JUMO digiLine CR with sep-
arate sensor
Intelligent electronic components for conductive conductivity sensors for automation systems with
JUMO digiLine, IO-Link, analog or binary signals
202762