Mobrey Squing 2 Vibrating Short Fork Technology

Vibrating fork technology uses the principal of tuning fork vibration. When a tuning fork is struck, it vibrates. This vibration occurs at what is known as the forks 'natural frequency'. This frequency will vary depending on the relative size, shape, and material of the forks.

The forks are driven to their natural frequency of oscillation by a piezo-electric crystal. Changes to this frequency are continuously monitored. The frequency of the vibrating fork sensor changes depending on the medium (liquid) in which it is immersed. The denser the liquid, the lower the frequency.

When used as a low level alarm, the liquid in the tank or pipe drains down past the fork, causing a change of frequency that is detected by the electronics and switches the output state (wet-to-dry).

When the Squing 2 is used as a high level alarm, the liquid rises in the tank or pipe, making contact with the fork which then causes the output state to switch (dry-to-wet).

Piezo-Electric Crystal		Exaggerated View of Vibration

The natural frequency (~1400Hz) of the fork is chosen to avoid interference from plant vibration which may cause false switching. This allows the use of a short fork length for minimal intrusion into vessel and pipe. Using Short Fork Technology, the Mobrey Squing 2 is designed for use in virtually all liquid applications. Extensive research has maximized the operational effectiveness of the fork design making it suitable for almost all liquids, including coating liquids, aerated liquids, and slurries.