850 Precision Altimeter

The Imagenex Model 850 Precision Altimeter accurately measures the range to the bottom, surface, obstacles or objects. It is a completely self-contained unit, less than 2” in diameter and approximately 7” long, making it ideal to use for many applications. With your choice of 500 kHz or 200 kHz, it requires only power and an RS-232 or RS-485 serial interface to an external device.

850 Precision Altimeter

Underwater Hardware Specifications

Frequency

500 kHz or 200 kHz

Range

500 kHz: 0.3 m – 50 m (1’ – 164’)
200 kHz: 0.7 m - 100 m (2.3' - 328')

Transducer

Conical beam

Transducer Beam Width

500 kHz: 10º
200 kHz: 20º 

Transmit Pulse Length

500 kHz: 10 microseconds
​200 kHz: 30 microseconds

Range Resolution

500 kHz: 1 mm
200 kHz: 2 mm

Min. Detectable Range

500 kHz: 0.3 m (1')
200 kHz: 0.7 m (2.3')

Max. Operating Depth

700 m 
(or 6000 m available)

Interface

RS-232 @ 115.2 kbps (RS-485 optional) (other baud rates available)
Ethernet available

Connector

Four conductor, wet mateable (Subconn MCBH4M-AS)

Power Supply

12 – 50 VDC at less than 2 Watts

Dimensions

47.2 mm (1.86”) diameter x 181.9 mm (7.16”) length

Weight in Air

~300 g (~0.7 lbs)

Weight in Water

~60 g (~0.2 lbs)

Materials

Delrin & 6061-T6 Aluminum

Finish

Anodized

Ordering Information

700 m Unit (500 kHz)

850-000-140

6000 m Unit (500 kHz)

850-000-141

RS-485

Option               -007

External Trigger

Option               -023

200 kHz

Option               -057

Ethernet

Option               -058

Pitch, Roll, & Compass

Option               -059

850 Precision Altimeter

Features

  • NMEA 0183 Serial Output
  • 1 mm resolution
  • Wide voltage input
  • Free running output
  • Low power
  • Low cost

Applications

  • Single Beam bathymetry
  • Measure range to other structures & objects
  • Monitor sedimentation or scouring
  • Measure altitude of structures & objects
  • Touch down monitoring
  • ROV, AUV, & UUV

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