The Science That Kills the Fire at Its Source
Traditional extinguishers fight fire by removing one corner of the fire triangle. The Fire Safety Stick goes further—it adds a fourth dimension, using potassium ion aerosol chemistry to chemically interrupt combustion at a molecular level. Faster. Cleaner. More effective across every fire class.
The Problem: Traditional Extinguishers Create Their Own Damage
Most fire extinguishers were designed decades ago. They fight fire, but the methods they use cause significant collateral damage of their own.
The Science: Beyond the Fire Triangle
Every fire requires heat, fuel, and oxygen (the classic fire triangle). Foam removes oxygen access, water removes heat, and CO₂ displaces oxygen. This approach is physical and reactive—it requires overwhelming the fire.
The Fire Safety Stick: The Fire Tetrahedron (Chain Reaction Interruption)
The Fire Safety Stick introduces a fourth dimension: the combustion chain reaction. Fire is a self-sustaining chemical chain reaction between free radicals. By introducing free potassium radicals (K⁺), the Fire Safety Stick intercepts combustion radicals at a molecular level. Interrupt that chain reaction, and the fire cannot sustain itself—regardless of available heat, fuel, or oxygen.
Step by Step: From Activation to Fire Out in Seconds
The device contains no gas and is not pressurised. The aerosol jet is produced only upon activation when a stable solid compound transforms on contact with combustion.
- Step 01 — Activation: Strike the base of the Fire Safety Stick to activate it. No pins, hoses, or pressure gauges. The solid potassium nitrate compound begins reacting instantly.
- Step 02 — Aerosol Generation: The KNO₃ compound undergoes rapid oxidation, transitioning from solid to aerosol in milliseconds, releasing free potassium ions (K⁺) and inert nitrogen gas in a controlled jet.
- Step 03 — Chain Reaction Interrupted: K⁺ ions capture oxygen free radicals produced by combustion. Without free radicals, the chain reaction collapses instantly.
- Step 04 — Zero Residue Output: Combustion ceases. What remains: microscopic K⁺ particles (3–4 microns, invisible), harmless inert nitrogen gas, and trace water vapour.
The Chemistry & Atmospheric Discharge
The solid charge consists of Potassium Nitrate (KNO₃), an organic oxidiser, and a plasticiser resin. It is chemically inert at room temperature and stored safely without pressure.
2 KNO₃ → 2 KNO₂ + O₂ (K⁺ radicals released into aerosol state)
K⁺ + OH• (combustion radical) → KOH (Chain reaction neutralised → fire extinguished)
What Is Discharged into the Atmosphere?
How to Use It: Technique Makes the Difference
Because the Fire Safety Stick discharges a gas aerosol rather than a liquid or heavy powder, technique relies on building a containment cloud around the fire zone.
• Move the FSS slowly in a circular motion towards the centre.
• Direct cloud into enclosed voids (engine bays, cavities).
• Take full advantage of the 50–100s discharge window.
• Don't move the unit rapidly (disperses gas prematurely).
• Don't rush—slow and controlled is most effective.
• Don't stop early—allow full cloud saturation.
Fire Classifications: 5 Classes in 1 Compact Unit
Traditional devices cover 1 or 2 fire classes. A single Fire Safety Stick covers all major classes:
- Class A (Solid Combustibles): Wood, paper, fabric, cardboard, plastics (Homes, Caravans, Offices).
- Class B (Flammable Liquids): Petrol, diesel, oil, solvents, fuels (Cars, Boats, Workshops).
- Class C (Flammable Gases): LPG, natural gas, propane, butane (Catering, Heating, Industry).
- Class E (Electrical Equipment): Live electrical switchgear, motors, appliances up to 100,000 Volts.
- Class F (Cooking Oils & Fats): Deep fat fryers, chip pans, woks (Kitchens, Catering, Restaurants).
The science is proven. Is your property protected?
Available in 50-second and 100-second versions—compact enough for a glove box, powerful enough for commercial fleets.
Speak to Our Technical Team
Submit your inquiry below or email info@thhfe.com for technical specifications or fleet quotes.