Raphael presenting his talk When Air Becomes Data at Healthcare Innovation Summit Africa 2025

The air we breathe deserves the same rigour as the money we move.

Raphael Garcia da Costa designed the transaction ledger used by 20M+ people in 70+ countries, then turned that discipline on dust, air and roads. Founder of Hashtag AI Labs; co-founder of SensusAir and Sentinel AI. Named inventor on granted patent ZA 2021/10088 and international filing WO 2020/250007.

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● GHP Innovation Excellence Award 2025 ● Best Environmental Risk Management, USA 2025 ● Innovation Excellence Award 2026 ● SWIFT Innotribe Semi-Finalist 2015 ● Systems live on four continents

Trusted by

Anglo AmericanRio TintoFortescueWhitehavenSasolHalliburtonBarclaysNetcareFNBInvestecHollardBMWNikeRed BullToshibaKorridor
Portrait of Raphael Garcia da Costa
Since 2006
Money → Dust → Air → Roads
Meet Raphael

An engineer who learned trust from banking, and took it outdoors.

In 2010 Raphael founded Hashtag AI Labs, an AI engineering lab whose work now runs for companies from Rio Tinto to BMW. Alongside it he spent more than twelve years building financial ledgers where nothing could be lost. Today he also leads the technology at SensusAir and Sentinel AI, two companies that measure the air in clinics and the dust on mine roads, and he takes that story to healthcare, mining and technology audiences.

70+
countries on his ledger
4
international awards
4
continents deployed
DrEntry · Context · TimeCr
Pattern recognition from FinTech to infection control
Ledgers
in the
Air
Raphael Garcia da Costa
The framework

What banks know about trust, applied to the planet.

Every reading becomes an entry: time-stamped, placed in context, never overwritten. It's how a bank reconciles millions of transactions, and how Raphael's companies make dust and air data stand up to a regulator.

Read the method → The book: Ledgers in the Air
Raphael on stage holding a clear and a cloudy water bottle as a live demonstration
On stage with Raphael
The full talk, When Air Becomes Data, including the two-bottle live demo. Healthcare Innovation Summit Africa 2025 · 19 minutes.
The work

Three worlds, one discipline

Each venture started with a risk nobody was measuring properly.

Mine haul truck on a dusty road
Mines that breathe easier
Sentinel AI · DustScout
Patented sensors on haul trucks track silica, water and road wear in real time. Explore →
SensusAir AirVue sensor installed in an office corridor
Air you can finally see
SensusAir
Viral, mould and ventilation risk for schools, clinics and offices in five countries. Explore →
Dashcam view of a road with RoadScout condition overlays
Roads that report themselves
RoadScout · FleetScout
Ordinary vehicles survey every kilometre and flag driver fatigue before it costs a life. Explore →
Hashtag AI Labs FinTech Ledger VoltScout AI WeatherRanger Loqui EasyESG Easy2Africa BAS AI4DFuture
In the field

Not slides. Systems running today.

See the full record →
Crowded exhibition hall at the APIC 2026 conference
APIC 2026, USA. Infection-prevention leaders, and why indoor air belongs in their toolkit.
Raphael beside a Sandy Springs Fire Special Operations truck
Sandy Springs Fire, USA. SensusAir deployed across the department's facilities.
Controlled Environment Systems Research Facility, Gosling Research Institute for Plant Preservation
University of Guelph CESRF, Canada. Discussing AI for growing food in space.
Haul road with AI-detected surface defects boxed
AI on a haul road. Surface defects detected and logged per metre.
Mine haul truck on a dusty road
Rio Tinto. Sentinel AI's DustScout mapping haul-road dust.
Aerial view of an open-pit mine
AngloGold Ashanti. Sentinel AI dust-mitigation intelligence.
SensusAir AirVue sensor mounted on a wall in a fitness studio
AirVue in place. A SensusAir sensor reading the air of a live studio, every minute.
On stage

Conversations Raphael brings to the room

Raphael presenting to seated delegates, slide defining a ledger Raphael presenting a slide titled Transactions to Breaths Raphael on stage between sponsor banners Close-up of Raphael explaining AI pattern recognition Raphael at the APIC 2026 conference sign
For boards & ESG leaders

From money flows to matter flows

Why ESG data will only be trusted once it's kept like a bank's books, and how to get there.

For mining & heavy industry

Learning from Grasberg

What real-time monitoring changes for safety, water and licence to operate.

Delivered at Healthcare Innovation Summit Africa 2025

When Air Becomes Data

From transactions to breaths: what hospitals gain when air is recorded like money, and AI flags risk before anyone falls ill.

Bring the ledger to your stage, or to your site.

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