GS525A
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GS525A
Smoke Alarm
The GS525A is a 10-year sealed battery photoelectric smoke alarm featuring advanced dual-spectrum sensing technology that accurately distinguishes between real fire threats and common cooking smoke. With an industry-leading false alarm rate of less than 1% and over 10,800 automatic self-checks per day, it delivers reliable, maintenance-free protection around the clock. UL 217 listed and designed for easy ceiling mounting, it is the ideal safety solution for bedrooms, living rooms, and hallways in residential homes.
Bullet Points
Dual Fire Detection
See fast and slow burning flames
Smart Smoke Recognition
Distinguish normal smoke from fire smoke
Certified Safety
ETL listed and UL 217 9th Edition certified for reliable performance.
Advanced Sensing Technology
Specifically engineered to reduce nuisance alarms caused by cooking smoke.
Dual-Spectrum Photoelectric Technology
Enhanced sensitivity for faster detection of smoldering fires.
Self-Adaptive Tech
AI-learning adjusts for dust, heat, and humidity to maintain sensitivity and prevent false alarms.
10-Year Sealed Lithium Battery
Provides a decade of continuous protection with no battery replacements required.
Loud 85dB Pulsing Alarm
Provides powerful audible alerts to ensure notification during emergencies.
Auto-Monitoring & Self-Testing
Continuous internal checks of the sensor and battery for constant readiness.
10-Year Limited Warranty
Long-term protection and peace of mind for your home.
Key Specifications
Model NumberGS525A
Power SourceDC 3V(built-in )
DC Standby Current≤8uA
DC Alarm Current≤50mA
Alarm Sensitivity2-3%/ft OBS(UL)
Comply with standardUL217-8
Alarm Volume> 85dB(A) @ 3 meters.
Low Voltage ThresholdDC 2.7V±0.1V
Silence time8±1 minutes
Humidity Range≤ 85% relative humidity (RH)
Working temperature0ºC to 40ºC
Size100mm in diameter x 35.1mm depth
Usage Scenarios
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Bedroom – Reliable Protection While You Sleep
Install smoke alarms in every bedroom to provide early warning while you sleep, ensuring your family has time to evacuate safely.
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Living Room – Guarding Your Everyday Space
Protect your main living space where electrical appliances and daily activities may pose fire risks, with reliable smoke detection.
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Hallway – Critical Escape Route Warning
Place smoke alarms in hallways and corridors to detect smoke spreading between rooms and provide critical escape route warnings.
Bedroom
Living Room
Hallway / Corridor
Why Siterwell

With over a decade of expertise in IoT and safety technology, Siterwell partners with businesses worldwide to create smarter, safer living environments.

Backed by strong R&D capability, global certifications, and a 56,000 m² production base, we deliver both innovation and reliable large-scale manufacturing.
From award-winning designs to proven global delivery across Asia, Europe, and the US, we focus on building long-term partnerships that drive mutual growth and success.

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