Optiswitch 3000

The Optiswitch 3000, for the level detection of bulk solids, and the 5000, for the level detection of liquids, are virtually unaffected by the chemical and physical properties of their respective application media, including density, conductivity, viscosity and dielectric constant. Key to the Optiswitch’s robust operation is a tuning fork that is energized piezoelectrically and vibrates at the mechanical resonance frequency. Because the piezo is fixed mechanically, it is not subject to temperature shock limitations. When the tuning fork is immersed in a liquid or solid, the vibrating frequency changes, is detected by the integrated oscillator, and is converted into a switching command. Both the 3000 and 5000 are available in standard- and extended-tube versions, and the 3000 is also offered in a cable version.