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Instruction Manual, Alfa Laval Level Switch
TE91K023-EN5
3. General Description
3.1 Working principle of the level switch
The media acts as a virtual capacitor from the sensor tip to the metal shaft or the welding part.
An electrode inside the sensor tip builds a capacitor together with the surroundings. The medium with its dielectric
constant (DC value) is defining the capacitance value. A resonance circuit is created in combination with a coil in the
sensor head. Switching signal tripping is according to the measured resonance frequency and the programmed
trigger thresholds.
Alfa Laval level switch TE67O is designed for level detection in tanks and dry-run protection of pumps by empty pipe
monitoring. It detects liquid, pasty or oily media, but also solid-bulk materials like flour or plastic granulate. The TE67O
is capable of media differentiation by distinguishing the specific properties, such as oil, water, foam and liquid.
Reliable performance is assured in any mounting position (from top, bottom or side). Depending on the desired process
connection, different mounting options are available. Corresponding mounting aids and adaptors for conventional pro-
cess connections are available as an accessory.
The switching output is available as Normally Open (NO) and Normally Closed (NC) can be selected by re-connecting
the electronics (please see page 12)
The Alfa Laval level switch TE67O is default configured to cover the major part of potential applications. Where custom-
er-specific configuration is required because of difficult media (e. g. foamy or adhering), the interface programming tool
Alfa Laval Instrument Programmer (9614448501) allows for easy parameterization of the optimum switching point by
convenient teach-in functionality. The measured data can be visualized on a PC for further parameter adjustment, for
example time constant of a damping function and inverted switching output logic.
3.3 Recycling information:
Unpacking
Packing material consists of plastic and cardboard boxes.
Cardboard boxes can be reused, recycled or used for energy recovery.
Plastics should be recycled or burnt at a licensed waste incineration plant.
Maintenance
During maintenance seals and O-ring should be replaced (only on clamp connections).
All metal parts should be sent for material recycling.
Worn out or defective electronic parts should be sent to a licensed handler for material recycling.
Oil and all non metal wear parts must be taken care of in agreement with local regulations
Scrapping
At end of use, the equipment shall be recycled according to relevant, local regulations. Beside the equipment
itself, any hazardous residues from the process liquid must be considered and dealt with in a proper manner.
When in doubt, or in the absence of local regulations, please contact the local Alfa Laval sales company.
3.2 General description
