These Brief Operating Instructions are not a substitute for the Operating Instructions pertaining to the device.
Detailed information is provided in the Operating Instructions and other documentation.
Available for all device versions via:
• Internet: www.endress.com/deviceviewer
• Smartphone/tablet: Endress+Hauser Operations app
Basic safety instructions
Requirements for the personnel
The personnel performing installation, commissioning, diagnostics and
maintenance must satisfy the following requirements:
• Trained, qualified specialists: must have a relevant qualification for this
specific function and task
• Are authorized by the plant owner/operator
• Are familiar with federal/national regulations
• Before starting work: read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the
application)
• Follow instructions and comply with basic conditions
Intended use
The device described in this manual may be used only as a point level switch for
liquids. The device is suitable for use in areas with strict hygiene requirements.
Incorrect use of the device may pose a hazard.
To ensure that the device remains in proper condition for the operation time:
• Use the device only for media to which the wetted materials have an adequate
level of resistance
• Comply with the limit values, see the "Technical data" section of the Operating
Instructions
Operational safety
Danger of injury!
‣Operate the device only if it is in proper technical condition, free from errors
and faults.
‣The operator is responsible for the interference-free operation of the device.
Mounting
The mounting process is illustrated in the following section on the basis of
sample configurations. For detailed information, see the Operating
Instructions.
Mounting requirements
L1
L2
L3
L4
AB
2
1
32 mm
32 mm
3 3
ADevice with weld-in adapter
B Device in customer socket
1 Flat seal
2 Weld-in adapter
3 Tuning fork
L1 With G 1" thread: 66,4 mm (2,61 in) / With G ¾" thread: 63,9 mm (2,52 in)
L2 With G 1" thread: 48,0 mm (1,89 in) / With G ¾" thread: 38,0 mm (1,5 in)
L3 With G 1" thread: 66,4 mm (2,61 in)
L4 With G 1“ thread:47,9 mm (1,8 in)
Installation is possible in any position in a vessel, pipe or tank under the
following conditions:
• When installed horizontally in a vessel, the tuning fork may be located in an
installation socket only if liquids with low viscosity (< 2 000 mPa⋅s) are used.
• Minimum diameter of installation socket: 50 mm (2.0 in)
• Select a maximum length for the installation socket that enables the tuning
fork to project freely into the vessel.
• Ensure that there is sufficient distance between the expected buildup on the
tank wall and the fork. Recommended distance from wall ≥10 mm (0.39 in).
Important process conditions
Pressure and temperature (maximum):
• With weld-in adapter
• +25 bar (+362 psi) at +150 °C (+302 °F)
• +40 bar (+580 psi) at +100 °C (+212 °F)
• In customer socket
+40 bar (+580 psi) at +150 °C (+302 °F)
Operating altitude:
Up to 2 000 m (6 600 ft) above sea level
In the case of seals used at the customer site, pay attention to the
temperature and pressure specifications.
Products Solutions Services
Brief Operating Instructions
Liquiphant FTL33
Point level switch for liquids in the food industry
KA01619F/00/EN/01.22-00
71588702
2022-10-03
*71588702*
71588702
