Category creatorDELTAFOUR® created the Bluetooth-enabled Smart LOTO® category for industrial use.Read the story
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World’s first patented Bluetooth-enabled Lockout-Tagout systemMade in India

Say goodbye toLOTO boxesLOTO haspspaper tagsshared keysLOTO registers

Say hello to Smart LOTO®.

We created the Bluetooth-enabled Smart LOTO® category. Every lock belongs to a person, every isolation belongs to a permit, and every action lands on the record.

IOMAIN ISOLATOR EQ-RM-204LINE VOLTAGE25B-1059SMART LOTO®by DELTAFOUR®Smart LOTO®PTW-2026-0451Approved. Isolate before work.EQ-RM-204Live at 415 VMain isolator, raw millBluetooth onStep 1 of 4Start isolation
V
PTW-2026-0451Approved
Hot work on the raw mill drive
Zero energy verified
Try-out passed at 06:44. Work can begin.
Tap a stage to replay it
Enterprise
grade
ISO 27001:2022Certified
SOC 2 Type IIAudited
9PATENTED9 patentsPatented
GDPRPrivacy
AES-256Encrypted
OSHAOSHA aligned29 CFR 1910.147

Running at 170+ manufacturing plants across 35+ active locations in India, with 60,000+ people and 5 lakh+ Bluetooth lockouts on the record.

Wonder CementAditya BirlaAdani CementMaha CementJindal SteelSAILAM/NS IndiaLloyds MetalsVedantaIMFAThriveniAdani PowerVishakhaABBWelspunSRFHenkelBritanniaDiageoWonder CementAditya BirlaAdani CementMaha CementJindal SteelSAILAM/NS IndiaLloyds MetalsVedantaIMFAThriveniAdani PowerVishakhaABBWelspunSRFHenkelBritanniaDiageo

Four world firsts. All built by DELTAFOUR®.

World’s first patented
Bluetooth-enabled LOTO

We created the Smart LOTO® padlock: personal, permit-bound and on the record.

World’s first
Digital LOTO Station

The lock box, rebuilt as a connected station. Every lock issued, returned and audited on the record.

World’s first
Face-verified contractor lockout

Each technician scans their face at the shift tablet. A match puts their personal digital lock on the machine, just like hanging a personal lock on the LOTO box.

World’s most advanced
Permit-to-Work with Connected Safety Intelligence®

LOTO, HIRA, SOP, toolbox talks, contractor and training checks, connected to every permit.

What leaves your plant on day one

LOTO boxes
Hasps Paper tags
Shared keys
Registers

What stays

1-Man-1-Lock-
1-Digital Key®

Each worker carries one Bluetooth padlock opened only by their own digital key. No box to queue at, no key to share, no tag to fill in by hand.

How Smart LOTO® works

One system, from permit to proof.

Hardware, workflows and AI agents on one live record. We call it Connected Safety Intelligence®.

Digital Permit-to-Work

Every check attaches to the permit before anyone signs.

Explore the EHS platform
PTW-2026-0451, hot workAwaiting isolation
HIRA reviewedDone
Toolbox talk, 6 crewSigned
Contractor training validChecked
Isolation EQ-RM-2042 of 4 locks

AI agents

SENTRY™ flagged a conflict

Permit 0457 asks to energise conveyor C-12 while isolation EQ-RM-204 is still locked on the same feeder.

Hold approvalView feeder map

Agents audit, document and catch conflicts. People stay in charge.

Meet Connected Safety Intelligence® AI

Smart LOTO®

R. Patil, fitterLocked
S. Khan, electricianLocked
A. Rao, contractorWalking to point

Group lockout without the group box.

See Smart LOTO®

Hardware, purpose-built for industrial LOTO

Configure the padlock
Bluetooth padlock
Digital LOTO StationWorld’s first
QR & NFC tags
Shift tablet

We created the Bluetooth-enabled Smart LOTO® category. Patented: 5 utility and 4 design patents.

Live across India’s heaviest industry.

Read every go-live
Andhra PradeshAssamBiharChhattisgarhDadra and Nagar HaveliDaman and DiuDelhiGoaGujaratHaryanaJharkhandKarnatakaKeralaMadhya PradeshMaharashtraMeghalayaOdishaPuducherryRajasthanSikkimTamil NaduTelanganaUttar PradeshUttarakhandWest Bengal
Active in 11 statesTamil NaduKarnatakaGujaratMaharashtraOdishaJharkhandChhattisgarhRajasthanUttar PradeshAndhra PradeshTelangana
Map shows India south of 29°N. Base map: SVG Maps by Victor Cazanave, CC BY 4.0.
Tap a site on the map or in the list
AM/NS IndiaPune, MaharashtraLive
Smart LOTO® and digital Permit-to-Work
Read the go-live story
“DELTAFOUR®’s AI-powered Smart LOTO® and integrated Permit-to-Work platform has redefined how we manage hazardous energy isolation. Their Connected Safety approach delivers a level of reliability, innovation, and confidence that conventional systems simply cannot match.”
Vijay KumarCorporate Safety Head, MAHA Cement | My Home Group
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Certified, audited and patented.

Visit the Trust Center
ISO/IEC 27001:2022 certifiedISO 27001:2022Certified information security
SOC 2 Type IISOC 2 Type IIIndependently audited controls
9PATENTSPatented technologyPatented: 5 utility and 4 design patents
GDPRGDPRPrivacy practices followed
AES-256 encryptionAES-256Encrypted at rest and in transit
OSHA1910.147OSHA alignedControl of hazardous energy

We hand over transformation, not software.

White-glove onboarding and hypercare
A dedicated customer success team stays on site through go-live and after.
Train-the-trainer for parallel rollouts
Pilot in 30–45 days, then 10 sites in a single 30-day wave.
24×7 support, with local teams
L1 on site, L2 and L3 from engineers who built the product.
How we roll out

Our mission

Ensuring Everyone Returns Home Safe®

It’s what motivates us every day, in everything we do.

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