About

About SR-3

SR-3 enters filled aboveground storage tanks and moves across internal floor plates using eight-thruster control and autonomous navigation. A 256-element phased-array ultrasonic probe captures dense corrosion and defect measurements, while cameras document welds, coatings and internal conditions.

The platform supports API 653 and EEMUA 159 inspection programmes while the tank remains in service. Square Robot processes the measurements into corrosion maps, settlement information and certified engineering reports. The company has inspected more than 400 tanks across 17 countries.

Capabilities

Source-backed capabilities

Workflows: Industrial inspection
Robotic inspection
Commercial deployment - Square Robot documents SR-3 for robotic inspection of hazardous storage tanks while they remain in service.
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Supply

Supply / Components

Kollmorgen frameless motor and Square Robot SR-3
Kollmorgen Frameless Motor For Square Robot Sr3 - Actuation - Kollmorgen - Kollmorgen supplies modified KBM frameless motors for Square Robot SR-3’s eight thrusters - source: kollmorgen.com
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Timeline

Square Robot SR-3 receives FM hazardous-location approvals
2025-01-29 - Regulatory - The certification supports robotic inspection while tanks remain in service. FM Approvals is the named certification authority. The approval supports Square Robot SR-3's path toward fielded use in maritime autonomy, underwater robotics or marine inspection workflows.
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