The fire evolution curve. Underhood acts in the blue zones, long before the red. Tap to explore →
Risk Intelligence for Public Transport

Fire risk detected before smoke.

Traditional fire detection starts at smoke. Underhood starts at risk assessment, hours to days earlier. Edge sensors, maintenance history, and a global incident database combine into a single score for every vehicle in your fleet.

The fire evolution curve. Underhood acts in the blue zones, long before the red.

Five layers of intelligence. One risk score.

No single signal is enough. Underhood combines five independent data sources into a weighted composite score for every vehicle.

30%

Real-time sensors

Temperature, smoke, vibration from ESP32 edge devices in SB1/SB2/SB3 vehicle zones.

25%

Maintenance history

When was the last battery, electrical, or fire-system inspection, and what did it find?

20%

Vehicle profile

Age, fuel type, battery chemistry, safety equipment: the risk baseline per vehicle.

15%

Inspection compliance

Are shift checklists being completed on schedule? Compliance predicts incidents.

10%

Incident intelligence

How does this make/model compare to the global fire incident database?

Most vehicle fires don't happen suddenly. They build up. A bearing overheats. A battery cell runs hot for days. Smoke sensors in a well-monitored vehicle would catch these patterns hours, or days, before ignition.
From the Underhood field guide: Detecting Fire Risk Before It Becomes a Fire

Built as one system.

Edge hardware, cloud platform, and community intelligence: three pillars of fleet fire-risk management.

Hardware

ESP32-based sensor boxes. SB1 cooling and HVAC, SB2 exhaust and transmission, SB3 passenger and fuel. PT100 probes, MQTT telemetry every few seconds.

See the sensor kit →

Platform

Real-time alerts with rate-of-change detection, maintenance work orders, inspection checklists, and multi-tenant fleet oversight.

Tour the platform →

Incident database

A global, curated dataset of public-transport fire incidents, classified by vehicle, propulsion, fire origin, and cause. Free to browse.

Browse the database →

Protect your fleet before the first alarm.

Order the kit, install it yourself with the shipped QR-guided wizard, and start scoring your fleet the same day. Need help shaping a risk-management strategy? Our team runs paid onboarding and advisory engagements.