en
Ultrasonic sensor 2UF
Date: 28.06.2019
901A0004A01M - V03
3/7
3
Transport/storage
Only store and transport the ultrasonic sensor
in a cardboard box protected by bubble wrap
packaging.
4
Technical data
Performance data, dimensions and/or functions
see supplied product specification/drawing/data-
sheet.
Focus tube
Variants (material) are possible, dependent on
the medium. Resistance is dependent on the tem-
perature and duration for which the sound tube is
exposed to the medium.
Information
In the event of deviations from the
specification, contact elobau. Validation
performed by testing.
5
Description
1
Name plate
2
Tank O-ring seal
3
Focus tube O-ring
seal
4
Ultrasonic trans-
ducer
5
Tube vent hole
6
Focus tube
(option)
7
Tank flat seal
8
4-hole flange
9
Ultrasonic sensor
head
Information
The figure is for illustration purposes
only. See additional datasheet (sepa-
rate document).
4
3
2
1
5
7
6
9
8
Method of operation
The ultrasonic transducer (4) generates a sound
pulse and transmits it. The sound is reflected
at the surface of the medium (e.g. diesel) in the
tank.
The ultrasonic transducer (4) records the echo.
Based on the time of flight of the pulse, the elec-
tronics in the ultrasonic sensor head (9) deter-
mine the fill level.
The ultrasonic sensor head (9) outputs the result
via a current or voltage signal that depends on
the tank level.
The interface is used for power supply and trans-
fer of the measured values to the control unit.
The purpose of the focus tube (6) is to guide the
sound. If the vehicle has a sloping orientation
it prevents the sound from being scattered in
the tank (the surface of the medium remains
horizontal).
Instead the sound is transmitted directly back to
the ultrasonic sensor for evaluation.
Measurement is not possible in the range <
50 mm from the ultrasonic transducer (4). MeaM
-
surements are dependent on the reflection of
the medium. Smooth surfaces, or under certain
circumstances moving media, delivery good mea-
surement results.
Information
For actual applications contact elobau.
