Flexible tube water level - with electric display of liq. level in two measuring tubes in holders connected by flexible hose (OE150976)

A pulse-echo ultrasonic device is provided at the bottom of each measuring tube. It send pulses towards the liq. surface and receives the echoes. Their output signals correspond to equal or different propagation times and are applied to a common electronic measurement and amplification unit for comparison and evaluation. This unit is connected to a display. The display indicates zero or middle value when both liq. levels are the same. Both measuring tubes are placed on the object whose level is to be tested. The marking can be set to a reference level so that any detected level differences can be evened out and effective result observed at the display.