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FAFNIR GmbH
Schnackenburgallee 149 c
22525 Hamburg
Tel.: +49 / (0)40 / 39 82 07-0
www.fafnir.de
III.b … assembling and dismantling
Assembling and dismantling must solely be carried out with the power disconnected!
Prior to the installation, it may be necessary that the float/s or the density module is disassembled.
During the assembly, it must be ensured that the float/s or the module is/are mounted the right way on
the sensor tube.
Only for the TORRIX Ex ... with screw terminals the opening of the sensor head is provided. Further
disassembly may damage the filling level sensor and invalidate its approval.
III.c … installation
The installation must be carried out only with the power disconnected. Special rules and regulations,
including EN 60079-14 and local installation regulations, must be observed.
If a device is supplied with screw-in unit, the thread of the screw-in unit must be fitted with suitable
sealing material, screwed into the existing sleeve and tightened. With a riser installation, the plastic
centring aid is plugged onto the sensor head. Then let the sensor slide into the riser tube until it stands
firmly on the bottom. If the filling level sensor is supplied without process connection, the installer is
responsible for compliance with the EX-requirements.
General information (see also EN 60079-26, section 4.3):
If a device is installed in the boundary wall between Zone 0 and Zone 1, it must be ensured that a
sufficiently tight gap (IP66 or IP67) is achieved after installation.
Flexible filling level sensor (TORRIX Ex … Flex …, VISY-Stick … Flex …)
This type can be produced with different sensor bases to serve for stabilizing the sensor. A foot can
be a magnetic base. The magnet is then encapsulated in an electricity conducting plastic and can
therefore be used in potentially explosive areas.
LPG filling level sensor VISY-Stick … LPG …
The adjustable installation kit for LPG tanks was developed to allow the sensor to be installed and
removed at any time without any additional work and without having to open the tank. The adjustable
installation kit for LPG tanks consists of a jacket pipe with special LPG float made of BUNA and a ¾“
NPT cutting ring fitting. In the case of installation with a cutting ring fitting, the position of the sensor
can no longer be altered after the union nut has been tightened.
Environmental sensor VISY-Stick Sump …
This environmental sensor can be fixed with the mounting kit.
When wiring the sensor to the associated equipment (preferably blue coloured cable), the approved
inductance and capacitance of the associated equipment must not be exceeded. The terminals of the
sensor must be connected to the same terminals of the isolating amplifier.
For the level sensors with screw terminals type TORRIX Ex ... and TORRIX Ex HART ... , the terminal des-
ignation is "+" and "-". For devices with M12 connectors, the pin assignments are as follows:
Pin
TORRIX Ex SC …
VISY-Stick …
TORRIX Ex C …
TORRIX Ex TAG …
VISY-Stick … TLS
TORRIX Ex RS485 …
VISY-Stick … RS485 M12-Cable (Female)
1
+
+
+
2
A
A (+)
3
-
-
-
4
B
B (-)
Table 1: Terminal assignment of the sensors
