The electronics of OPTISWITCH continuously monitors the following criteria:
• correct vibrating frequency
• line break to the piezo drive
If one of the listed faults is detected or in case of voltage loss, the electronics takes on a defined switching condition, i.e. the relay deenergizes (safe condition).
Solid detection in water
With the OPTISWITCH (3100 C, 3200 C, 3300 C) version for solid detection in water (option), the vibrating element is adjusted to the density of water. If submerged in water (density 1 g/cm³), OPTISWITCH signals "uncovered". Only if the vibrating element is also covered with solids (e.g. sand, sludge, etc.) will the sensor signal "covered".