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General information and technical specifications of DUT-E / Design and operation principle
DUT-E fuel level sensors. Operation manual. Version 8.1
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1.3 Design and operation principle
DUT-E fuel level sensor (see figure 7) consists of a measuring probe (1) , fuel level sensor
“ head ” with an electronic module located inside (2) , interface cable (3) with connector for
electrical connection (4) .
Figure 7 — DUT-E structure
DUT-E operation principle is based on condenser capacitance measurement, where measuring
probe pipes are used as capacitor plates. Electric capacitance changes depending on measuring
probe immersion depth in the fuel which is dielectric liquid. The sensor analyzes current value
of electric capacitance and then generates an appropriate output signal.
WARNING: Capacitive principle ensures highest accuracy of liquid measurement
when the liquid has constant dielectric permeability coefficient . Otherwise,
additional inaccuracy of measurement may appear.
DUT-E CAN
DUT-E A5
DUT-E A10
DUT-E F
DUT-E I
1
4
3
2
4
4
1
1
3
3
2
DUT-E AF
DUT-E 232
DUT-E 485
2