DEPLOYDatabase

Robot model

SR-3

Fully autonomous submersible inspection robot for in-service aboveground storage tank inspections.

Track SR-3
Manufacturer
Square Robot
Form factor
underwater
Maturity
commercial
Lifecycle
active
Deployments
2
Website
squarerobot.com ↗

The verified answer

As of Aug 2026, DEPLOY verifies SR-3, a underwater by Square Robot (commercial): 2 verified deployments on record. 1 source back the record.

Overview

Fully autonomous submersible inspection robot for in-service aboveground storage tank inspections. API 653 and EEMUA 159 compliant, FM Approved. Features 256-element PAUT sensors for thickness measurement and corrosion mapping, 8 thrusters, and fiber-optic communications. Weighs 265 lbs in air with approximately 10 lbs negative buoyancy when submerged.

Verified vs. claimed

Maturity stage
commercial(Commercially deployed with revenue-generating operations.)
Sources on file
View all sources →

Key facts

Coverage

up to ~90% of tank floor

Inspection method

phased-array ultrasonic testing

Certification

FM Class I Div 2

Class

autonomous tank-inspection robot

Specs

Class

autonomous tank-inspection robot

Method

phased-array ultrasonic testing

Coverage

up to ~90% of tank floor

Certification

FM Class I Div 2

Data & sources

Web sources

1

1 source backing this record.View all →

Pricing

No verified price is on record for SR-3. Physical-AI systems are often sold through enterprise contracts or operated as a service rather than at a public list price.

How DEPLOY tracks pricing

Deployments (2)

  • SR-3 at United Statesoperational

    Global agreement with ExxonMobil to deploy robotic inspection services across the US.

  • SR-3 at Baton Rouge, Louisiana, USAoperational

    SR-3 deployed into a 140-foot diameter aboveground storage tank containing 150,000 barrels of gasoline at ExxonMobil Baton Rouge facility.

Free to use on your site, with a link back to DEPLOY.

SR-3 on the deployment map

View the global map

Where SR-3 is verified operating. Explore the deployment map by place and type.

Free to use on your site, with a link back to DEPLOY.

Recent activity

Every change to this record is dated, sourced, and independently verified where marked.

Full change history →

Safety record

No incidents on record for SR-3.

Only active incidents are counted. Retracted incidents are excluded from this summary but remain reachable at their canonical URLs.

Sources (1)

  1. https://squarerobot.com/robotic-tank-inspection-for-volatile-products/

Common questions

What is SR-3?
Fully autonomous submersible inspection robot for in-service aboveground storage tank inspections. API 653 and EEMUA 159 compliant, FM Approved. Features 256-element PAUT sensors for thickness measurement and corrosion mapping, 8 thrusters, and fiber-optic communications. Weighs 265 lbs in air with approximately 10 lbs negative buoyancy when submerged.
How much does SR-3 cost?
SR-3's price is not publicly disclosed. DEPLOY has no verified price on record for SR-3 from Square Robot. Physical-AI systems like this are often sold through enterprise contracts or operated as a service rather than at a public list price; check the manufacturer for the latest.
Is SR-3 actually deployed in the real world?
Yes. SR-3 is independently verified in real-world operation on the DEPLOY registry, confirmed at named deployment sites with primary sources: not a concept, render, or demo-only.
Who makes SR-3?
SR-3 is made by Square Robot, based in Westborough, MA, USA, founded in 2016.
Where is SR-3 deployed?
2 verified deployments of SR-3 are on the DEPLOY registry, including at United States, Baton Rouge, Louisiana, USA.
Can you buy SR-3?
SR-3 is in commercial deployment and is sold to operators; contact the manufacturer to buy, and see the pricing section for any recorded price.
What are alternatives to SR-3?
On the DEPLOY registry, comparable underwater robots to SR-3 include X3, EverClean Hull Service Robot, Ghost Shark (XL-AUV), HUGIN.
How does SR-3 compare to X3?
SR-3 and X3 (Blueye Robotics · 5 deployments) are both underwater robots on the DEPLOY registry. SR-3 has 2 verified deployments on record. Compare both records for specs, safety, deployments, and verified-vs-claimed autonomy.
Is SR-3 a top underwater?
On DEPLOY's intelligence score, which blends verified deployments, safety, adoption, media, and IP signals, SR-3 ranks in roughly the top 35% of underwater models tracked by the registry.
What is SR-3's maturity stage?
SR-3 is at the commercial stage on the DEPLOY maturity ladder (research, prototype, pilot, commercial, production). Commercial stage means production-grade deployments are operating at named customer sites.
Is SR-3 safe?
SR-3 has no incidents on record in the DEPLOY registry. This does not constitute a safety guarantee; it reflects the incidents DEPLOY has tracked and verified to date.
Methodology: Verified · 1 source (no primary) · last reviewed 2026-08-15

Verification posture

Verified

Low confidence

Review state

Stable

Last reviewed 2026-08-15

Maturity + lifecycle

Maturity stage: commercial

Lifecycle: active

Architectural position

Cohort: underwater

Sources by quality tier

1
unclassified
Unclassified source

The framework is documented at /methodology. Corrections at /corrections. Reviewer: DEPLOY editorial team.

Methodology surface for SR-3.

Recent coverage

SR-3 in third-party press

X Square Robot brings its valuation to $2.8B with four consecutive funding rounds

Jun 30, 2026

X Square Robot Closes Four Consecutive Rounds, Hits $2.8B Valuation as It Powers Physical-AI Foundation Models

Jun 29, 2026