VDO Tubular-type Sensors
Immersion tubular-type sensors are also used for measurement of the fuel level, in association with
an electrical indicating device.
How they work
The liquid of the fuel level to be measured contains a floater, which rises or falls when the level
changes. Contact springs, which are attached to the floater, slide over two resistance wires running
parallel to the floater movement and set up a resistance value which is proportional to the
liquid level. The value of the respective resistance is measured with an electrical indicating device
and displayed in terms of fuel level values. The liquid to be monitored reaches the conduit
through a flood boring. By this means, the inflow and outflow speed and the transmission of shortterm
variations of the liquid level to the floater contained in the conduit (e.g. due to in case of
cornering or braking) is dampened. With some transmitters the grounding is attached
to the casing. Other transmitters are without grounding, i.e. the grounding is routed over a separate connection.
Tubular-type sensors can be additionally equipped with a warning contact, in order to signal the
attaining of a filling level limit value (reserve), as well as for continuous measurement.
We stock VDO senders in lengths varying from 150mm up to 500mm, please select your required length from the list below.
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