![155929](https://img.feedandgrain.com/files/base/wattglobalmedia/all/image/2015/04/an.155929.jpg?auto=format%2Ccompress&q=70&w=400)
BlueLevel Technologies' VHL and MHL Mini liquid level detection sensors use vibrating fork structures with piezoelectric technology, available with a range of probe lengths. The standard VHL is equipped with a universal AC/DC power supply and a SPDT relay output, while the VHL Mini is equipped with solid-state, two-wire AC or three-wire DC outputs.