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JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address:
36035 Fulda, Germany
Phone: +49 661 6003-0
Fax: +49 661 6003-607
Email: mail@jumo.net
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM 20 2DY, UK
Phone: +44 1279 63 55 33
Fax: +44 1279 62 50 29
Email: sales@jumo.co.uk
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: +1 315 437 5866
Fax: +1 315 437 5860
Email: info.us@jumo.net
Internet: www.jumousa.com
Data Sheet 202930
V3.00/EN/00494842
Brief description
The JUMO tecLine CR-4P fills the gap between conductive conductivity measurement with
two-electrode conductivity sensors, and inductive conductivity measurement.
Four-pin technology makes it possible to cover a very wide measuring range from about
1 µS/cm to 600 mS/cm, with just one conductivity sensor.
The hygienic design of both the sensor and the system for process connection (JUMO PEKA)
makes it easy to use in pharmaceutical and food technology. JUMO PEKA is an adapter system
that combines the conductivity sensor with the process connection. All the materials are
physiologically safe, and meet FDA standards.
Stainless steel electrodes are inserted into a circular, plastic body. The process seal provided
as standard is an EPDM O-ring. A fast-response temperature probe delivers information about
the process temperature to the measurement amplifier. Electrical connection is made via an
M12 connector.
The conductivity sensor is available in three fitting lengths, for optimum installation in different
pipe diameters. The conductivity sensor can also be installed in container walls. No incident
flow is required to make it work, but is recommended for fast, stable measurement values and
to prevent the accumulation of deposits.
A certificate of quality is included among the items supplied (exact cell constant, FDA approval
for the material, typical surface roughness, etc.).
Operative range:
Their vast measuring range allows the sensors to be used in washing processes in food and
drink applications, pharmaceuticals and biotechnology, where the different conductivities have
to be safely recorded by a measuring system (e.g. CIP/SIP applications, reverse processes in
ion exchangers, phase separation, bottle cleaning plants, process water).
Note:
Used in combination with the JUMO AQUIS 500 CR transmitter/controller, as per data sheet
202565 and JUMO PEKA process connection adapters as per data sheet 409711.
Key features
• Vast measuring range
• Hygienic process connections (clamp,
Varivent
®
, aseptic NKS)
• CIP/SIP capability
• Design complies with EHEDG and FDA
standards
• Certificate of quality included
Block diagram
voltage/current
voltage
current/voltage
control
voltage measurement
(1) (4)
(2)
(3)
(1)
(1)
(1)
(2) (3)
(4)
(4)
(4)
Pt
1000
Function
The conductivity sensors have two pairs of
electrodes. The transmitter applies alternating
current at the outer pair of electrodes.
A voltage is released at the inner electrodes,
subject to the conductivity of the measuring
material. The transmitter acquires the voltage
and uses it, in conjunction with the given
current, to calculate the electrolytic
conductivity value. Functionally, excitation
and measurement are kept separate. This has
some advantages compared to 2-electrode
conductivity sensors, as the effects of
polarization recede into the background.
To a large extent, incoming resistances are
automatically compensated. Measurement
errors as a result of contamination or
deposits, are reduced.
JUMO tecLine CR-4P
Conductive 4-Electrode Conductivity Sensor
Typ 202930
with JUMO PEKA adapters
20293000T10Z001K000
JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address:
36035 Fulda, Germany
Phone: +49 661 6003-0
Fax: +49 661 6003-607
Email: mail@jumo.net
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM 20 2DY, UK
Phone: +44 1279 63 55 33
Fax: +44 1279 62 50 29
Email: sales@jumo.co.uk
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: +1 315 437 5866
Fax: +1 315 437 5860
Email: info.us@jumo.net
Internet: www.jumousa.com
Page 2/6Data Sheet 202930
V3.00/EN/00494842 20293000T10Z001K000
Technical data
Connecting cable (accessory)
JUMO CR-4P cable, type 202990/20-53-00-xx/000
Order details
Typical measuring range
a
a
Measuring ranges are also dependent on the transmitter being used.
1 µS/cm to approx. 600 mS/cm
Accuracy ≤ 5 % of measured value
Cell constant
b
b
See the namplate for a measured cell constant. A cell constant deviation can be adjusted at the transmitter.
typically, K = 0.3 - 0.4 cm
-1
Operating temperature -10 to +120 °C, briefly 140 °C (sterilization)
Maximum pressure 16 bar at 25 °C
6 bar at -10 °C and +140 °C
Temperature measurement With Pt1000, DIN EN 60751 Class A
Electrical connection
c
c
The CR-4P cable is required for connection (see Accessories)!
M12 connector
Enclosure protection IP65
Fitting length 18 mm
38 mm
48 mm (see "Dimensions")
Materials in contact
with the measuring medium
• Cell housing
• Electrodes
• Probe pocket
•Seal
FDA compliant
PEEK
Stainless steel 1.4435 (316L)
Stainless steel 1.4435 (316L)
EPDM (other material on request)
Process connection JUMO PEKA
d
(hygienic process connection)
Available process connection adapters:
• Varivent DN 40-125, stainless steel 1.4435 (316L)
• Clamp DN 25/32/40 and DN50, stainless steel 1.4435 (316L)
• Aseptic DN 40 and DN50, stainless steel 1.4435 (316L)
• Aseptic NKS DN 40, stainless steel 1.4435 (316L)
d
See data sheet 409711 and "Dimensions" on the following pages.
Sensor installation Only possible in conjunction with JUMO PEKA adapters!
e
Surface quality (roughness) Stainless steel components ≤ 0.6 µm
Plastic components ≤ 0.8 µm
M12 cable socket: Metal, 8-pin
Cable diameter: 7.5 mm
Cable material: PUR, blue
Ambient temperature: -30 to +80 °C
Cable length: 5 m oder 10 m
a
a
For metrological reasons, the maximum cable length is limited to 10 m!
YE
ø7.5
GN
BN
BL
GR
PK
RD