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This Manual applies to the CD34... capacitive sensor family
Warnings
This manual contains important information regarding installation. We
highly recommend that you read the manual carefully before installing the
sensor. Save the manual for future use. The Installation manual is intended
for qualified technical personnel.
Settings and connections
The CD34... sensor is designed to be used for water-based liquid (con-
ductive) level detection. The sensor functions are guaranteed only when
the sensor is installed according to the guidelines in this manual and by
means of the installation accessories specified for the CD34... sensor
family. Carlo Gavazzi disclaims any liability for damages due to modifica-
tion or non-approved use of the sensors.
The applied mounting bracket can be used for tube and container mount-
ing, and the sensor lock ensures a firm position of the sensor thus allow-
ing the sensor to be replaced without moving the bracket.
+
1BN
2WH
I
<100mA
LOAD
4BK
-
3BU
PNP NO
1BN
+
2WH
I
<100mA
LOAD
4BK
-
3BU
PNP NC
Pin
Colour
1
BN (Brown)
2
WH (White)
3
BU (Blue)
4
BK (Black)
When not used, we recommend that the teach wire is permanently con-
nected to V-
Safety precautions
This sensor must not be used in applications where personal
safety depends on proper function of the sensor (The sensor is not
designed according to the EU Machinery Directive)
Installation and use must be carried out by trained technical per-
sonnel with basic electrical installation knowledge.
The installer is responsible for correct installation according to local safety
regulations and must ensure that a defective sensor will not result in haz-
ards to people or equipment. If the sensor is defective, it must be replaced
and secured against unauthorised use.
Product description and applications
The CD34.. capacitive sensor is designed for detecting water-based
(conductive) liquids through a non-metallic container wall, and it automat-
ically adapts to various thicknesses of plastic or glass walls. The universal
mounting brackets allow the sensor to be fixed on multiple tubes or con-
tainers of plastic or glass materials.
The sensor reliably detects the liquids while compensating for residue
film, moisture or foam build-up from liquids such as water, milk, body
fluids (blood), acid- or alkaline solutions with conductivity as high as 50
ms/cm inside or outside the container wall.
Main characteristics
The sensor is equipped with two LED indicators:
• Green LED: for power ON
• Yellow LED: for output function
Protection against short circuit and reversed polarity
Approvals: CE, UL, ECOLAB
2
1BN
4BK
I
<100mA
LOAD
2WH
3BU
NPN NO
1
2
4
3
1BN
4BK
I
<100mA
LOAD
2WH
3BU
NPN NC
Description
Supply (V+)
Teach input
Supply (V-)
Output
Sensor
16
10
6.6
3.2
Mounting bracket
+
-
+
26
-
The sensor can be installed in any position. As for environmental condi-
tions, please refer to the datasheet for the sensor.
Mounting with velcro on tank
Mounting with cable
ties on tube
English
16
Dimensions (mm)
8
10
6.6
3
7.6
Installation
Installation options
Adhesive mounted
Embedded flush mounted
8
3
3.2
Mounting bracket on
small pipe
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