Kobold NWS Vibrating Level Switch

The KOBOLD NWS Series level switch for liquids works on the vibrating fork principle. A piezoelectric crystal is matched to the frequency of the tuning fork in air and is used to set the fork vibrating. When the fork is immersed in liquid, its resonant frequency changes. The piezoelectric crystal is then no longer matched to the tuning fork, which causes the vibration to stop. The NWS Series vibrating fork level switch’s internal electronics detect this change and signal an alarm condition. In addition to the electrical switching control function, an LED signals the status of the switch and the presence of power at the NWS level switch’s terminals. The switching logic is easily toggled between N/O and N/C through an internal switch. The NWS Series is available with a solid-state switch that may be used in a 2-wire or 3-wire mode. The 2-wire configuration can switch loads up to 240 VAC at 0.5 amps, while the 3-wire system switches a DC voltage when activated. The KOBOLD NWS Series vibrating fork level switch for liquids is compatible with non-coating and some coating media with viscosities ranging up to 5000 cSt.