Submersible Ultrasonic Sensor ULM-2

Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight, along with knowledge of the speed of sound in water, allows determining the distance between sonar and target. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes.

The ULM-2 underwater sensor is a multi-purpose single beam echo sounder. It can be used for depth measurement of underwater vehicles, underwater robots, obstacle avoidance sonar and other underwater distance measurement applications.

The sensor uses a high frequency 200kHz transducer to provide a beam width of about 13° for ROV and AUV altimeter and water depth measurement applications. It has a measurement range of up to 60 meters.