The Submersible Depth Transmitter II (SDT-II) is a low cost pressure sensor designed for water level measurement applications in rigorous environmental conditions. Low range units are favorable for open-channel flow applications, while higher range units may be used for ground water, storage tanks, or other applications.

Internal electronics convert the signal to a 4-20mA output, with 4mA corresponding to zero depth (atmospheric pressure) and 20mA to rated depth for the selected range.

The SDT-II also features schedule-80 threading along the outside of the sensor, making it easily mountable for various applications.