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ODELCO Building128 Kalayaan Avenue
Central, Quezon City
1100 Philippines

Telephone Numbers:

MIDAS Echosounder GPS Echosounder

Echo Sounder 

Single (210kHz) or dual (210 / 33kHz) channel input, using unique “fuzzy logic” DSP to give accurate readings and reliable performance, even in shallow water. Data may be logged and output either raw (as measured) or corrected for tide and heave. 

Range: 0.3 - 100m (210kHz), 1.8 - 100m (33kHz) 

Accuracy: greater of ±0.01m or ±0.02% 

Resolution: 0.01m (210kHz), 0.04m (33kHz) 

Sample Rate: 6Hz 


MIDAS Surveyor logs and displays DGPS position data in WGS84 or Local Grid. User has full control over spheroid and projection constants for Local Grid setup. 

Standard: Integral 12 channel GPS/SBAS receiver with combined antenna: 

± 4m (CEP), with no correction 

± 2m (CEP), with SBAS correction 

Option : Surveyor also accepts user’s own differential, GPS or RTK data input. 

Other Inputs 

The Surveyor will accept data input from all the additional sensors listed below. All data may be logged and output in real time on a single RS232 channel, and tide & heave data may be used to provide real time corrections to depth data. 

Tide: RS232 text data from tide gauge or RTK. 

Heave: RS232 data from heave sensor (up to 60Hz). 

Sound Speed: Continuous or spot readings from Valeport Sound Velocity Sensors may also be logged. 

Gyro/Auxiliary: RS232 input of vessel heading or any other text string may be logged with the survey data. 

Event Marker: Surveyor is supplied with remote event marker 

Data Outputs 

Real Time RS232 output on a single channel of any, some or all of the active data inputs, in choice of industry standard formats. 


16Mb internal FLASH memory provides nominal 32 hours of data logging. An optional 32Mbyte memory is available at time of order. 

Data Display 

240 x 128 pixel graphics LCD display, providing numerical and graphical depth display, position data (WGS84 or Local Grid) and all other incoming parameters. On screen help and simple menu-driven setup functions allow full system control. 


Internal: 8.4Ah sealed lead acid battery pack 

External: 12 – 24vDC 

Power: 3W (sampling), 25W (max when recharging) 

Battery Life: Nominal 24hours working time 

(Recharge using external power) 

Connector: Fischer 


Surveyor is supplied with SurveyLog windows based software, allowing data extraction & display. All data is presented in ASCII format, and may easily be exported for use in industry standard hydrographic survey software packages, or simple XYZ format data. 


Surveyor: Rugged IP67 case, 35 x 33 x 16cm, 9kg 

Accessories: IP67 case, 41 x 33 x 18cm, 9kg 

Dual Tdx: Combined 210/33kHz, 30 x 30 x 10cm, 12kg 

Shipping: 62 x 44 x 38cm, 18kg (basic set) 



0420001 MIDAS Surveyor logging unit with 16Mb memory, internal battery pack, DC power lead, RS232 output lead, event marker, operating manual & SurveyLog software 

0420002 210kHz transducer with 10m cable and mounting spigot 

0420005 Integral 12 channel GPS/SBAS receiver with antenna, 5m cable and mounting spigot. 


0420003 33kHz transducer with 10m cable and mounting spar 

0420004 33/210kHz transducer with 10m cable and mounting spar 

0420008 RS232 input lead for external data input (tide, heave etc.) 

0420009 Memory upgrade to 32Mbyte