When it comes to underwater distance measurement, choosing the right acoustic beam angle and range can make all the difference for your Remotely Operated Vehicle (ROV), Autonomous Underwater Vehicle (AUV) or surface craft operations.
To help break it down, we’ve compared our two industry-leading subsea altimeters and echosounders head-to-head: The Impact Subsea ISA200 (Long Range) and the ISA500 (Precision).
ISA200 and ISA500 – Which one should you choose?
Our ISA200 and ISA500 both deliver 1mm accuracy, with optional AHRS for Heading, Pitch & Roll and ECHOGRAM capability for sonar backscatter.
ISA200 – Long Range
- 250m+ range
- 15.2° conical beam
- 200kHz operation
- Best for: Applications where maximum range and altitude tracking at a distance are the priority.
ISA500 – Precision
- 120m+ range
- Narrow 6° conical beam
- 400–600kHz acoustic frequency
- Best for: Projects demanding high-resolution precision measurements in tighter beam constraints.
Both can be used across a wide range of subsea applications, including ROV & AUV altitude, heading & attitude measurement, hydrographic survey, equipment deployment, distance measurement and scour monitoring.
Compare full technical specifications of our subsea altimeter & echosounder range
