ISA500 Range of Altimeters
Underwater Altimeter & Echo Sounder with Optional Integrated Pitch, Roll & Heading (AHRS)
The ISA500 family of underwater Altimeters provide range measurement capability to the nearest 1mm with a range capability of over 120 meters.
Impact Subsea
Aberdeen, GB
Description
The ISA500 underwater Altimeter & Echo Sounder provides exceptionally long distance measurement capability – in excess of 120 meters. In addition to providing exceptionally long range capability, the unit has a 1mm accuracy – allowing precision underwater distance measurements to be made.
Optionally, the ISA500 can also be provided with an integrated Attitude and Heading Reference System (AHRS). This provides highly stable Heading, Pitch and Roll readings.
Another optional capability is ECHOGRAM, providing sonar backscatter data for each ping.
Altitude & Echo Sounding
The ISA500 utilises sonar technology to derive distance measurement.
Operating by default at 500kHz, the unit utilises a broadband composite transducer and electronics together with an advanced digital acoustic engine. The combination of these enable the unit to achieve long range and high accuracy.
The sensor can be operated at any frequency from 400 to 600kHz – ideal for different applications or operating in conjunction with other hydro-acoustic or sonar equipment.
The ISA500 provides a single range measurement per ping (for use as an underwater Altimeter). With ECHOGRAM enabled the ISA500 can provide sonar backscatter data (for use as an Echosounder).
Attitude & Heading Reference System (AHRS)
Optionally available on the ISA500 is an integrated Attitude & Heading Reference System (AHRS) providing Heading, Pitch & Roll.
The AHRS is based on Micro-Electrical-Mechanical-System (MEMS) based technology.
Within the ISA500 there are three MEMS based Gyros, Accelerometers & Magnetometers. The outputs from each of these MEMS devices are fused together, providing highly stable Heading, Pitch & Roll.
The Heading is highly resilient against temporary magnetic interferes. This is aided by a soft and hard iron calibration feature once the unit has been installed on the ROV, AUV or other underwater application.
An ISA500 For Every Underwater Distance Measurement Application
The ISA500 is available in 1,000, 6,000 & 11,000 meter rated housing configurations. Housings are offered in either Titanium or Acetal.
Both forward looking and right angle housing configurations are available – enabling simple integration into any underwater vehicle, towed asset or structure.
An OEM version of the ISA500 is also available, which offers an un-housed version of the ISA500 for integration into a third party housing or system. Alternative connector options are also available upon request.
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Specifications
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Physical Properties
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Weight in air [kg]
0.5
Weight in water [kg]
0.325
Width [m]
0.047
Length [m]
0.109
Min. operation temperature [°C}
-10
Housing material
Titanium or Acetal
Max. operation temperature [°C}
60
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Operating properties
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Minimum range {m}
0.06
Maximum range {m}
175
Depth rating {m}
11,000
Output data format
Various ASCII Outputs - Configurable
Sampling rate (fixed or adjustable)
10 Hz (Adjustable)
Data flow
Continous, Triggered, Both
Slant range correction
Y
Telemetry
Both
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Power supply and communication
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Power Supply [V]
9 to 36VDC
Operating current
30mA @ 24VDC, 51mA @ 24VDC (Max Ping Rate & Power)
Output interface
RS232 & RS485
Analog output
Software Configurable Current or Voltage Output
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Other specifications
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Data storage
External
Stand alone mode
Y
Sound velocity input
Y
Pressure sensor
Y
Right angled type
Y
Additional capabilities
Also provides Heading, Pitch, Roll & Temperature. Available in various housing materials and mechanical configurations.
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General
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Year of initial development
2015
Year of latest version
2022
Area of Application
Subsea ROV & AUV
Field of Use
Accurate, Short & Long Range Distance Measurement
Languages Supported
English
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Acoustic properties
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Min. Operating frequency [kHz]
400
Chirp
N
Beamwidth {deg}
6 Degree Conical
Max. acoustic accuracy
0.75 millimetre
Digital resolution
1 millimetre
Analog resolution
12 bit
Min. acoustic accuracy
0.75 millimetre
Max. Operating frequency [kHz]
600
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More information
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Distinguishable features
- Integrated Heading, Pitch & Roll (Optional)- 120+ meter range- 1 millimetre resolution - stable & repeatable - All settings are software configurable (Range, Frequency, Slant Range Correction, Output String, Communications, etc)- Can be paired with the ISD4000 to provide Survey Grade Depth & Temperature- Supplied with seaView software suite - Can be used for Hydrographic Surveys with the seaView Hydro Survey app- Can be used for Flooded Member Detection (FMD) with the seaView FMD app
Documents
Brochure
ISA500 Underwater Altimeter Datasheet Rev 3.1.pdf
1.92 MB
Other documents
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ISA500 Manual (Rev 2.8).pdf1.25 MB
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ISA500 11K Full Ocean Altimeter Datasheet Rev 1.7.pdf1.26 MB
