ALZ 3920 is a small diameter version of our standard submersible hydrostatic level transmitter. Highquality silicon piezoresistive sensor, robust Ø21 mm stainless steel housing and a hydrometric cable with the ventilation tube provide high perfomance in a slimmer form factor for a wide variety of industrial level measurement applications. The 21 mm probe diameter allows installation in confined spaces such as boreholes. An integrated Pt100 temperature sensor is optionally available.