DT101 *Please see DT101Xi

*The DT101 is no longer available - Please see the DT101Xi

MULTIBEAM PROFILING SONAR with Internally Integrated Motion Reference Unit & Sound Velocity Sensor

The DT101 Multibeam Profiling Sonar (i.e. Multibeam Echo Sounder) is a single instrument integrating the sonar, motion reference unit (MRU), and sound velocity sensor into one sleek and compact unit. The DT101 requires only one cable for operating all three sensors and is a portable solution for any survey. Compatible with the DT100 SIR (Sensor Interface Relay) power supply/timing box, simply connecting a dual antenna GNSS/GPS receiver is all that is required to perform bathymetric surveys.

DT101 *Please see DT101Xi

Underwater Hardware Specifications


240 kHz

Swath Width

(nominal beam geometry)
Transmit:  120° x 3°
Receive:  120° x 3°

Effective Beam Widths

Narrow:  0.75°
Medium:  1.5°
Wide:  3°

Number of Beams

Default:  480
Selectable:  240, 120

Range Resolution

Screen: 0.2% of range
Output: 0.02% of range


75 m (246’) water depth
150 m (492’) slant range

Min. Detectable Range

0.5 m (1.6’) below transducer

Motion Reference Unit

Internally mounted OEM version of CDL MiniSense3

Pitch and Roll Accuracy:  0.04°
Heave:  5 cm or 5% (whichever is greater)

Sound Velocity Sensor

Internally mounted OEM version of AML Micro•X

1400 m/s to 1600 m/s +/- 0.025 m/s

Max. Operating Depth

(Submersion depth)
300 m (984’)
Contact Imagenex if a greater depth rating is required

Interface to PC

Ethernet (100 Mbps) using TCP/IP

Max. Cable Length

100 m (328’) on CAT5-e, longer cable runs possible with additional hardware


Underwater wet-mateable 8 conductor

Power Supply (Sonar Head Only)

22 - 32 VDC at less than 15 Watts


306 mm (12.05”) L x 118 mm (4.63”) H x
94 mm (3.68”) W

Weight in Air

4.2 kg (9.5 lbs)

Weight in Water

1.9 kg (4.2 lbs)


Polyoxymethylene (i.e. Delrin), Titanium, PVC, Titanium connector

Power Supply / Timing Box

DT100 Sensor Interface Relay (DT100 SIR)

2 port Ethernet switch (DT101 PC and Survey PC)
Interfaces to:
     GNSS (GPS)
     Gyro / Heading Sensor
100 – 240 VAC or 12 – 36 VDC input range
Dimensions: 394 mm (15.5”) x 314 mm (12.4”) x 92 mm (3.6”)

Max. Ping Rate

20 Hz

Software Specifications


Windows™ Operating System

Windows™ XP, Vista, 7, 8, 10

Display Modes

Sector, Linear, Perspective, Profile, Beam Test 

Persistence (Trail)

1 – 300 seconds 

Range Scales

5 m, 10 m, 20 m, 30 m, 40 m, 50 m, 60 m, 80 m, 100 m, 150 m

Sector Sizes

30°, 60°, 90°, 120° 

File Format

Raw Data:  (filename).D1R
Profile Point:  (filename).D1P

Recommended Minimum Computer Requirements

2 GHz Pentium 4
256 MB RAM
20 GB Hard Disk
1024 x 768 screen resolution 

Ordering Information

300 m Unit


Sensor Interface Relay Box (DT100 SIR)


IP Address*

Option               -020

*Note:   Standard IP Address is
            A different IP Address may be specified upon ordering.

130° x 2°

Option               -070

DT101 *Please see DT101Xi

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