Endress+Hauser Introduces Liquiphant Liquid Level Switches
Liquiphant FTL31 and FTL33 liquid level switches based on vibrating tuning fork technology are designed to replace float switches or conductive, capacitance and optical sensors. The switches also work in areas where other measuring principles are not suitable due to conductivity, build-up, foam, turbulence, flow conditions or air bubbles. A piezoelectric drive causes the sensor’s tuning fork to vibrate at its resonance frequency. When the tuning fork is immersed in a liquid, its frequency changes due to the change in density of the surrounding medium. The switch monitors the resonance frequency, and indicates whether the tuning fork is vibrating in air or is covered by liquid.