Technical data

BKI 03 ATEX 027X  spa3804a0600p_06  5 / 44
Thank you for choosing a NIVELCO instrument.
We are sure that you will be satisfied throughout its use.
1. INTRODUCTION
A Total beam angle of 5-7 at –3 dB as is featured by most of Nivelco’s
SenSonic transducers ensuring a reliable measurement in narrow silos with
uneven side walls as well as in process tanks with various protruding objects.
Furthermore, as a result of the narrow beam angle - the emitted ultrasonic
signals have an outstanding focusing - deep penetration through gases, vapour
and foam is ensured.
rr
D
XD
1 m 0,21 m
2 m 0,3 m
5 m 0,56 m
10 m 1 m
15m 1,45 m
X
m
X
M
Diameters corresponding
to
5° beam angle.
Application
The EasyTREK compact ultrasonic level transmitters from NIVELCO are
excellent tools for level measurement of liquids.
Level measurement technology based on the non-contacting ultrasonic
principle is especially suited for applications where, for any reason, no
physical contact can be established to the surface of the material to be
measured.
Principle of Operation
The ultrasonic level metering technology is based on the principle of
measuring the time required for the ultrasound pulses to make a round trip
from the sensor to the level to be measured and back. The sensor emits an
ultrasonic pulse train and receives the echoes reflected. The intelligent
electronic device processes the received signal by selecting the echo
reflected by the surface and calculates from the time of flight the distance
between the sensor and the surface which constitutes the basis of all output
signals of the EasyTREK.
Minimum measuring distance (X
m
) is determined by the design of the unit within which the measurement is not possible (Dead Zone) its value is according with
P05 on page 18. Since measurement is impossible within this range material should not get into this zone.
Maximum measuring distance (X
M
) is the greatest distance (determined by the design of the unit) which can be measured by the unit under ideal conditions. (See
parameter P04 on page 17). Maximum measuring distance of the actual application (H) must not be greater than X
M
.