Compact 235 kHz OEM single-beam echo sounder for shallow-water bathymetric surveying from survey boats, USVs and remotely controlled vessels.
kordil logo

Ohmex

#
SonarMite BTX OEM
Sonarmite BTX OEM single frequency Echo sounder (sonar) is the best choice for shallow water bathymetric surveys up to 75 meters deep. The SonarMite Echo Sounder was the result of nearly two years research and development to further extend the boundaries of shallow water hydrographic surveying equipment. Sonarmite offers reliable survey at shallow water by automatically adjusting signal quality according to depth changes, digital signal processing and filtering. 235 kHz operational frequency allows surveys to be carried out without being affected by almost any noise source.

The Ohmex SonarMite BTX OEM is a compact, low-power single-beam echo sounder designed for permanent installation and integration with survey boats, unmanned surface vessels and remotely controlled hydrographic platforms. Its active 235 kHz Smart Transducer performs signal generation, digital processing, filtering and bottom detection directly within the transducer. This reduces analogue interference and provides stable depth measurements in shallow water, including environments affected by outboard-engine noise and repeated acoustic reflections. The system measures depths between 0.30 and 75 m and outputs a quality value with every sounding, allowing unreliable measurements to be identified during acquisition or post-processing. Depth data can be integrated with external GNSS positioning and hydrographic survey software through serial, Bluetooth or optional USB communications. Unlike the portable SonarMite BTX, the OEM version uses an external DC power supply and is intended for fixed installation inside a vessel or third-party survey platform.

Features & Benefits

  • Compact OEM design for permanent installation
  • Suitable for small survey boats, USVs and remote-controlled vessels
  • 235 kHz active Smart Transducer
  • Digital signal processing within the transducer
  • Reliable shallow-water bottom tracking
  • Depth range from 0.30 to 75 m
  • ±0.025 m RMS depth accuracy
  • Quality value supplied with every depth measurement
  • Reduced susceptibility to electrical and acoustic noise
  • Low power consumption
  • Wide external DC input range
  • RS-232 and Bluetooth data communication
  • Optional USB interface
  • Integration with external GNSS receivers
  • Compatible with hydrographic acquisition and mapping software
  • Interchangeable active-transducer options

Typical Uses

  • Shallow-water bathymetric surveys
  • River, lake, reservoir and canal surveys
  • Port and harbour surveys
  • Dredging and construction monitoring
  • Pre-dredging and post-dredging surveys
  • Coastal and nearshore surveys
  • Bridge and hydraulic-structure inspection
  • Environmental depth surveys
  • USV and unmanned survey-vessel integration
  • Permanent installation on small survey boats

Key Specifications

Parameter

Specification

Instrument type

OEM single-beam echo sounder

Transducer frequency

235 kHz active transducer

Beam width

Approximately 8–10°

Depth range

0.30–75.00 m

Depth accuracy

±0.025 m RMS

Sound-velocity range

1,400–1,600 m/s

Depth-data output rate

2 Hz

Acoustic ping rate

3–6 Hz, depth-dependent

Data communications

RS-232 and Bluetooth

Optional interface

USB

External power

7–32 V DC for the OEM installation

Typical power consumption

70–120 mA

Operating temperature

0°C to +45°C

Depth quality output

Supplied with every measurement

Standard frequency transducer

Airmar P66 or compatible active transducer

Installation

Fixed/OEM vessel or USV integration

GNSS

External GNSS connection through survey hardware or software

System Integration

The SonarMite BTX OEM normally operates as a depth sensor connected to a computer, tablet or onboard USV controller. Depth measurements are combined with positions from an external GNSS receiver within the selected hydrographic acquisition software. Depending on the interface and software configuration, supported outputs can include proprietary SonarMite formats, simple ASCII depth, NMEA 0183 DBT, DPT and XDR messages, and commonly used single-beam echo-sounder protocols.

 

Brochures