The problem
Air quality in a working plant is usually managed by extraction and assumed to be fine while the fans are running. The assumption is reasonable and the failure mode is that nobody notices when it stops being true — an extraction fan that has failed makes the building quieter, and quiet is not something anybody investigates.
Solvent and VOC exposure is also cumulative and unremarkable in the moment. Unlike a gas leak there is no event to respond to, which is exactly why continuous measurement is worth more here than an occasional survey.
Which channels see it
Detection here is not one sensor reporting a number. It is several channels read at the same instant, where what one channel does NOT do is often as informative as what another does.
- Air quality — The primary channel — general solvent and VOC load.
- Combustible gas — Cross-sensitivity means the two move together on hydrocarbons. Separating them is what identifies the event type.
- Humidity — Drifts up when ventilation stops. Slow, unglamorous, and one of the most reliable indicators there is.
- Sound level — The fan. A fall here is the earliest sign extraction has failed.
- Ambient temperature — Rises with humidity when air is no longer moving.
How it is detected
A volatile organic release has its own signature: air quality rising steeply, gas following through cross-sensitivity, and a distinct decay once the source is removed. That decay is part of the identification — it is what separates a spill that has been dealt with from a leak that has not.
Ventilation failure is the more interesting case, and it is the clearest demonstration of why rates of change beat thresholds. The first thing that happens is the acoustic level FALLS, because the fan stopped. Then humidity and temperature drift up together. No channel exceeds any threshold for a long time, and a fixed-threshold instrument reports nothing at all — while the room slowly becomes a worse place to work.
Because the genome is built from signed velocities, a falling channel is as legible as a rising one. Ventilation failure is a recognised signature rather than an absence of alarms.
What an operator gets
The output is meant to be actionable by somebody on shift, not interpreted by an engineer afterwards.
- Continuous VOC and solvent load, with the trend rather than a spot reading.
- Ventilation failure detected as an event in its own right, from the fan going quiet.
- Correlation that identifies what kind of event it is — release, spill, or extraction failure.
- A history that makes a recurring pattern visible: a process step, a shift, a season.
