10LB ANSUL SENTRY AA10S - ABC Dry Chemical Fire Extinguisher
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Wholesale PricingThe Ansul Sentry AA10S is a high-performance, 10 lb multipurpose ABC dry chemical fire extinguisher engineered for light to ordinary hazard commercial environments. Rated 4-A:80-B:C, this unit delivers four times the Class A suppression power of an entry-level residential extinguisher, making it the standard choice for offices, retail warehouses, schools, and manufacturing plants where ordinary combustibles, flammable liquids, and electrical equipment all coexist.
Constructed with a seamless steel cylinder and high-tensile-strength components, the Sentry AA10S is built to endure the demands of a commercial building. Every unit is factory air-tested at 600 PSI to ensure full pressure is maintained through years of standby service. Whether outfitting a new corporate facility or upgrading an industrial workshop, the AA10S delivers the reliability, durability, and code-compliance necessary to protect people and property.
The Science of Suppression: MAP Sintering and Chemical Interference
1. The 4-A Thermal Benchmark
A 4-A rating indicates that the 10 lbs of monoammonium phosphate in this unit provides the equivalent extinguishing power of 5 gallons of water on Class A combustibles. This allows an operator to suppress a significant office or warehouse fire involving furniture or palletized inventory without the weight and cleanup of a large water unit.
2. FORAY Agent Sintering (Class A)
On wood and paper fires, the MAP agent undergoes sintering at approximately 350°F. The powder melts to form a molten, oxygen-excluding crust over the fuel surface, sealing it and preventing deep-seated re-ignition after the initial flame knockdown.
3. Vapor Suppression (Class B)
For flammable liquid fires, the AA10S can suppress up to 80 square feet of a deep-layer fuel fire. The agent interrupts the free-radical chain reaction of the flame, providing rapid knockdown without requiring direct contact with the fuel source.
Why the Ansul Sentry AA10S is the Safety Director's Strategic Choice
- Seamless Steel Integrity: Unlike welded cylinders with seams prone to stress fractures, the AA10S uses a seamless steel design that increases structural safety, especially in high-vibration environments like manufacturing floors or vehicle mounting.
- Extended Suppression Window: A 10 lb extinguisher provides a significantly longer discharge time — up to 22 seconds — compared to smaller models, giving the operator time to maintain a sustained sweep to ensure the fire is completely neutralized.
- NFPA 10 Travel Distance Compliance: Commercial fire codes require that no occupant be more than 75 feet from a Class A extinguisher. The 10 lb Sentry is the most efficient way to meet this spacing requirement in ordinary hazard occupancies.
The Ansul Sentry AA10S is the primary choice for ordinary hazard fire protection where general-purpose ABC coverage is required:
- Office Buildings and Corporate Facilities: The standard protection for corridors and breakrooms where paper and electrical hazards are concentrated.
- Retail Warehouses: Providing the necessary Class A knockdown for high-piled storage and palletized goods.
- Schools and Universities: Protecting classrooms and assembly areas with a unit powerful enough for serious fires but manageable for staff.
- Auto Service Shops: The 80-B rating provides essential Class B protection for bays where solvents and fuels are used alongside ordinary combustibles.
- Manufacturing Facilities: Safeguarding CNC machinery and industrial control panels where multiple fire classes coexist.
| Feature | Details |
|---|---|
| Manufacturer | Ansul (A Johnson Controls Brand) |
| Model | AA10S |
| Agent Type | FORAY (Monoammonium Phosphate) ABC Dry Chemical |
| UL Rating | 4-A:80-B:C |
| Agent Capacity | 10 lbs (4.54 kg) |
| Total Weight | Approximately 18 lbs |
| Discharge Time | Up to 22 Seconds |
| Cylinder | Seamless High-Tensile Steel, Factory Tested to 600 PSI |
| Certifications | UL Listed, NFPA 10 Compliant |
To maintain fire code compliance and ensure your facility remains insurance-eligible, the AA10S must follow a strict maintenance protocol:
- Monthly Visual Inspection: Verify the pressure gauge is in the green zone and the safety pin is secured by a tamper seal. Confirm inspection tags are current.
- Annual Professional Service: A certified technician must conduct an examination and verify the chemical's fluidity to prevent agent packing over time.
- 6-Year Internal Maintenance: Every six years, the agent must be recovered and internal components inspected per NFPA 10.
- 12-Year Hydrostatic Test: Mandatory to verify the structural integrity of the steel pressure vessel.
What does the 4-A:80-B:C rating actually mean?
The 4-A rating is equivalent to 5 gallons of water on Class A wood and paper fires. The 80-B rating means the unit can suppress 80 square feet of a deep-layer liquid fire. Together, this makes the AA10S one of the highest-rated 10 lb ABC extinguishers available and the standard specification for ordinary hazard commercial occupancies.
Is this extinguisher rechargeable?
Yes. The AA10S is a professional-grade rechargeable unit. After any use, it must be serviced and recharged by a certified fire protection technician before being returned to service — do not attempt to recharge fire extinguishers without proper equipment and training.
How do I operate this unit in an emergency?
Use the PASS method: Pull the pin, Aim the nozzle at the base of the fire, Squeeze the handle, and Sweep from side to side across the base of the flames. The AA10S provides up to 22 seconds of discharge — more time than smaller units — to ensure complete suppression before the agent runs out.
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