BELLSounder is designed to be a simple and rugged hydrographical survey solution with the basic functions of an echo sounder. Depending on the connected sensors, BELLSounder will function as a dual or a single frequency echo sounder. Powered by either an internal Trimble or a Hemipshere GNSS receiver, it provides the perfect solution for a hydrographic survey solution. The BELLSounder consists of a rugged Peli Case that provides a protected housing for every enviroment.


  • Ruggedized Peli-Case IP65 housing
  • IP65 External connectors
  • Internal Hemishpere DGPS + IALA L-Band
  • 23.5 x 18 x 11 cm (L x W x D)

Sensor options

  • 200 KHz 8 degrees transducer
  • 30&200 KHz Dual Frequency transducer

Output Data

  • GPS output: NMEA 0183
  • Sensor output: DBT


  • Internal Omnistar, RTK
  • Internal Trimble GNSS

Interfacing (All IP65)

  • 1x RS232 Comport
  • 1x Ethernet (IP65)

External Data Interfaces

  • Aux RS232 Input
  • Baud rate: 4800 - 115200