A Vibrating Fork
Sets the Tone
In Brief:
Vibration Measuring Principle
Imagine a fork that is caused to vibrate by a piezoelectric drive –
i.e. due to changes in electric polarization. These changes create
what is known as a resonance frequency. Immersing the vibrating
fork in a liquid causes the fork’s natural resonance to decrease
due to the change in the density of the surrounding medium. The
electronics in the limit switch monitor the resonance frequency
and indicate whether the vibrating fork is oscillating in air or
covered with liquid. A signal is then emitted via the DC-PNP or
AC/DC electrical connection.
Level Measurement
Whether you want to determine
your storage capacity or obtain accurate information
about tank contents in real time, the Vibracon LVL-A7
reliably takes care of measurement tasks.
Thanks to the solid overflow and dry run protection offered by the new
Vibracon LVL-A7 vibration limit switch, reliable monitoring of your
liquid measurement process is guaranteed – even for applications in
the food industry where hygiene is critical (Vibracon LVL-A7H). Level
measurement technology has a broad range of applications, since
storage tanks can contain such a wide variety of materials. While other
measuring principles commonly fail as a result of the particular filling
substances or tough environments in question, the Vibracon LVL-A7
offers a high level of resistance, taking factors such as conductivity,
deposits, currents, or air bubbles in its stride. This is partly due to the
robust stainless steel housing (316L), which ensures a high level of
durability as no maintenance is required. This particular vibration limit
switch also features no mechanically moving parts that can wear out
or break. The plug-and-play functionality offered by the device ensures
the Vibracon is easy to handle as well as install, and what’s more,
the device can offer all of these benefits within a temperature range of
–40 °C to +150 °C.
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