ISA500
Underwater Altimeter & Echo Sounder with optional Pitch, Roll & Heading (AHRS)

- 120+ Meter Range
- Millimeter Accuracy
- Integrated Heading, Pitch & Roll
- Software to View, Log & Configure
- Digital & Analogue Interfaces
- Robust & Compact Housing
- Low Power Consumption
- Emulate Any Device
- Multi Echo Output
Introducing the ISA500
The ISA500 underwater Altimeter & Echo Sounder provides exceptionally long range 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.

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 unit 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.
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, structure or device.
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.
ISA500 Options
Use this flowchart to find the ideal configuration of ISA500 for your applicationOne Device – Many Applications
Provides Altitude readings from 120 meters above the seabed. Also provides Heading, Pitch & Roll. Can emulate any other device – making integration into any Autonomous Surface Vehicle (ASV) Autonomous Underwater Vehicle (AUV) or Remotely Operated Vehicle (ROV) very easy.
Reduce the equipment required to provide Altitude, Heading, Pitch & Roll by using a single ISA500 unit.
Read more about the ISA500 & FMD Application in the system datasheet here.
ISA500 Videos
ISA500 Introduction
ISA500 seaView Software Demo
Millimetre Accuracy Underwater Distance Measurement
Multi Echo Output
Conduct Single Beam Echo Sounder Surveys
Conduct Flooded Member Detection
Run Multiple Sensors Together
Heading Calibration