How can the fill level of individual wells in a multiwell plate be checked without contact?

A robot automatically feeds liquids into multiwell plates using several pipettes.

Automatically checking the filling status of individual wells in multiwell plates is often a challenge in laboratory and pipetting applications. The article shows how ultrasonic sensors with soundpipe can reliably distinguish between “empty” and “filled” even in small, conical wells – contactless, robot-compatible and independent of transparency or liquid properties.