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 1/6Data Sheet 202923
V2.00/EN/00421317
Brief description
Conductivity sensors in the 202923 series are used, for instance, in general water engineering,
air conditioning and refrigeration, drinking and bathing water, and in industrial rinsing and
process water circulation. The PVC body material restricts their application to media
temperatures up to 55 °C. Two variants with the cell constants K = 0.1 or 1.0 can be supplied.
Versions with the popular thread sizes G 3/4" or G 1" as well as a pluggable style are available
for installation. The pluggable version is appropriate for use, for instance, with suitable PVC tees
in the nominal sizes DN 25, 32 and 40. It enables fast de-installation of the sensor for cleaning
and maintenance. According to choice, the electrical connection is made either by a detachable
connector or an attached cable.
The overall construction and the wetted components are physiologically harmless. Stainless
steel (K = 0.1) or special graphite (K = 1.0) is used as the electrode material. The temperature
probe, which can optionally be integrated, simultaneously acquires the temperature of the
medium, for temperature compensation in connected instrumentation amplifiers.
Stainless steel variant K = 0.1
The sensor features 3 metallic pin electrodes. The two outer pins are electrically connected and
form one pole of the 2-electrode conductivity sensor. The stainless steel pin in the middle is the
counter electrode. This arrangement ensures highly accurate measurement with narrow stray
fields. A temperature probe can be integrated into the middle pin.
Graphite variant K = 1.0
Physical requirements necessitate using a special graphite as electrode material for high
conductance measurement. The two graphite electrodes are completely integrated in the
electrode shaft. The optional temperature probe is housed in a stainless steel sleeve that is
immersed in the solution under test.
Principle of operation
The 202923 series conductivity sensors are 2-electrode conductivity sensors. An a.c. voltage is
applied by means of a transmitter. The current flowing through the liquid and the electrodes is
determined by the conductivity of the liquid.
Vorläufig
V
• 2-electrode principle
• proven versions for industrial application
• measuring ranges 0 — 1 mS/cm (K = 0.1) or 0.01 — 15 mS/cm (K = 1.0)
• temperature range up to 55 °C, maximum pressure 6 bar at 25 °C
JUMO ecoLine CR-PVC
Conductive 2-Electrode Conductivity Sensor
202923 Series (former 2EL5... Series)
20292300T10Z001K000
V2.00/EN/00421317
Page 2/6
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 202923
20292300T10Z001K000
Technical data
Cell constant
a
a. Depending on the production conditions, the cell constant can deviate by ±10% from the nominal value. This deviation can be compensated
at the transmitter.
K = 0.1 or K = 1.0
Typical measuring ranges
b
b. The measuring ranges also depend on the transmitter that is used.
When used for wider ranges than the “typical” ones, measurement errors caused by polarization may occur.
0 – 1.0 mS/cm (with K = 0.1)
0.01 – 15 mS/cm (with K = 1.0)
Temperature compensation optionally with Pt100
Process connection screw-in thread G 3/4A, G 1A,
union nut DN 25
1 1/2“ for PVC tees
Body material PVC
Cell material stainless steel 1.4571 with K = 0.1
graphite with K = 1.0
Operating temperature up to +55 °C
Maximum pressure 6 bar at 25 °C
Electrical connection instrument connector (Hirschmann) to DIN EN 175301-803, IP65 protection
or 5 m attached cable, other cable lengths on request