Sounder S500


The S500 is a single beam echosounder designed for small ROVs, AUVs, and ASVs. The transducer and control electronics are unbundled to minimize external mechanical profile and maximize flexibility. The transducer (45.7 mm diameter x 33 mm) is rated to 300m depth, and the electronics module is housed inside the vehicle’s pressure enclosure. A narrow beam width about 5 degrees focuses the acoustic energy providing 100m range and good angular definition. CHIRP technology also maximizes range and provides excellent range resolution.

Only 2 left in stock (can be backordered)

SKU: CERULEAN_S500 Category:


The S500 sonar is a multipurpose single-beam echosounder. It can be used as an altimeter for ROVs and AUVs, for bathymetry work aboard a USV, as an obstacle avoidance sonar, and other underwater distance measurement applications.

The S500 implements CHIRP modulation, which sends a varying frequency ultrasonic pulse. The advantages of CHIRP include better signal to noise ratio, and much higher range resolution than non-CHIRP devices.

The S500 can report a simple distance measurement, or It can also provide the full signal profile for display as a “waterfall” plot like the display of a fishfinder. For that purpose, S500 is compatible with the Blue Robotics Ping Viewer. Raw signal strength data profiles can also be provided for advanced analysis in technical applications.

The S500 uses a high frequency 500 kHz transducer giving about 5 degrees beam width for ROV and AUV altimeter and bathymetry applications. It has a measurement range of over 100 meters. A bottom-tracking algorithm runs on the device to determine the distance to the seafloor.

Three communication interfaces include Ethernet (100Mb/sec), USB (12Mb/sec), and 3.3-5.0V serial (115kbaud).

Additional information


1x Sounder Control Board 1x Transducer with one meter cable (1 shield + 2 signal wires). with installed JST-GH connector (1 meter) 1x 2-wire power cable with installed JST-GH connector (60 cm) 1x extra JST connector 1x Oil-Resistant Buna O-Ring (McMaster-Carr part-number 9452K94) 1x Postcard with Link and QR code to on-line documentation

Technical Details

Control Electronics Power Supply 10-30 Volts, 2.5 Watts idle, 5 Watts at max ping rate of 10 pings/sec (typical) Dimmensions 69 x 38 mm. 4 mm below bottom mounting surface, 18 mm above bottom mounting surface. 2 M4 mounting inserts spaced 28mm apart. Interfaces Ethernet (RJ45 connector), USB (uUSB connector), 3.3-5.0V Serial (6 pin JST-GH) External Sync 3.3-5.0V digital Sync Input is available to optionally trigger pings timed to avoid interference with other acoustic devices. Sync Out (3.3V) is also available to signal the start and end of each ping emitted by the S500. (Available in a future f/w update) Communications Protocol S500 API documentation here Minimum Range Resolution 3 mm up to 17 meter range 9 mm up to 50 meter range 24 mm over 50 meter range reduced resolution optional to reduce waterfall data rate Transducer Acoustic Frequency 500 kHz Beam Width (2-way, conical) about 5 degrees. Modulation CHIRP with 20 kHZ bandwidth monotone ping also supported Minimum Range 0.3 meters Maximum Range 100+ meters Depth Rating 300 meters