Gems^® type UCL-510 ultrasonic level sensors are general purpose two-wire ultrasonic sensors that provide non-contact level detection up to 49.2″ (1.25m), with 4 relays for switch or control functions and continuous level measurement. This compact unit offers a non-contact alternative to float or conductance sensors in small tank chemical feed or handling applications when corrosive, sticky, or dirty media is involved. Gems UCL-510 is the non-contact solution for small tank level switch, control and measurement.