The World Leader in Robotic Tank Inspection
Square Robot's SR-3 autonomous inspection platform delivers API 653 and EEEMUA 159-compliant internal tank inspections while your tanks stay fully in service. No operational disruption. No confined space entry. Just precise, actionable data.
Explore the SR-3 Platform
About Us
Inspection That Works
As Hard As Your Tanks Do
Square Robot combines advanced robotics, high-resolution sensors, and intelligent automation to deliver internal tank inspections that are safer, faster, and more accurate, without taking your assets out of service.
Learn About Our Technology
400+
Tanks Inspected
$170M
Cost Saved
236000+
Confined Space Hours Eliminated
895
Tonnes CO2E Contained
Solutions
Why Leading Operators
Choose Square Robot
Square Robot delivers safer, zero-downtime inspections with high-resolution data and actionable insights, redefining how operators manage tank integrity.
400+
Tanks Inspected Globally
17
Countries Served
236K+
Confined Space Hours Eliminated
$150M
Reduction in Inspection Downtime
Robotic Tank Inspection Platform
The SR-3 Platform in Action
See how the SR-3 navigates tank environments, captures high-resolution data sets, and delivers deeper insight into asset integrity without a single worker entering the tank.
Explore the SR-3
Patented
Navigation
The SR-3 uses patented navigation to deliver corrosion readings within a six inch radius of location and position the robot’s phased array ultrasonic probe for access into the tank’s critical zone.
Robust Corrosion
Detection
Square Robot conducted a multi year study to answer the question of defect detection capabilities. Our PAUT system surpassed API 653 Annex G sizing expectations, reaching 99.6 percent confidence. Learn more here.
Certified
Inspections & Reports
Square Robot's experienced team of experts sets the standards for compliant API 653, EEMUA 159 and subsequent Extreme Value Analysis reports following both API 581 and EMMUA 247 standards.
Solutions
Inspection ROI:
The Square Robot Advantage
When tanks stay online during inspection, the financial impact is significant. Square Robot's on-stream robotic inspection eliminates downtime costs, reduces confined space labor, and delivers superior data; turning inspection from a liability into a competitive advantage.
Eliminate
Downtime Costs
On-stream inspections keep tanks in full service throughout the process. Whether inspecting while the tank is static or flowing, tank owners have continuous production revenue while staying in compliance.
Reduce
Total Inspection Costs
By eliminating the need to take the tank offline for inspection, robotic inspection eliminates costs associated with product removal and cleaning, waste disposal and degassing- dramatically reducing the total cost of each inspection program.
Protect
Asset Integrity
High density data sets give operators a clear and comprehensive picture of their tank's integrity, supporting proactive maintenance decisions before small issues become costly failures.
Improve
Maintenance Planning
Comprehensive, digitzied inspection reports allow asset owners to move from reactive maintenance to strategic, risk-based asset management across their entire tank portfolio.
Built for the World's
Most Critical Infrastructure
From refining and petrochemicals to aviation, terminals and power generation; Square Robot's SR-3 platform is engineered for any industry that depends on aboveground storage tanks operating safely and reliably.
Explore Industries
Insights & Resources
Square Robot's experts regularly publish technical insights, industry analysis, and inspection best practices, helping operators stay ahead of regulatory requirements and emerging technologies.
Square Robot Inc. Announces
New Funding and Collaboration
Square Robot’s PAUT Data Quality Evaluation (PDQE)—advancing beyond standard POD studies
Square Robot On-stream Inspection SR-3HT Robot Catalog
Benefits of Submersible Robotic Tank Inspections for Power Plants
Tools
See what on-Stream
Inspection could save you
Estimate your savings in confined space labor hours, inspection days, and total inspection costs using Square Robot's interactive Value Calculator.
FAQs
Everything you need to
know to Get Started
From understanding benefits and cost savings to planning your first inspection, explore key answers that help you make decisions.
Yes. SR-3 inspections are designed to support API 653 requirements for internal inspection of aboveground storage tanks, with structured data capture and reporting aligned to regulatory expectations.
Traditional inspections require tanks to be taken out of service, emptied, cleaned, purged, and inspected manually. On-stream inspection with the SR-3 does all of this while the tank stays online, eliminating shutdown costs and confined space risk simultaneously.
The SR-3 is engineered for internal inspection of aboveground storage tanks while they remain in service, including tanks used in refining, terminals, and related applications.
Careers
Build the Future
of Inspection
Square Robot is building autonomous inspection robots that protect workers, keep critical infrastructure online, and generate data that drives smarter operations. If you're driven to solve real industrial challenges with cutting-edge technology, we want to hear from you.
