GS854U-BLDT
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GS854U-BLDT
Carbon Monoxide Alarm
The GS854U-BLDT is a state-of-the-art carbon monoxide alarm that goes beyond basic protection. Featuring low-level CO monitoring, it provides early warnings before concentrations reach dangerous limits. Powered by a sealed 10-year lithium battery, it ensures a decade of continuous, maintenance-free safety.
Bullet Points
Low-Level CO Monitoring
Provides an early warning "pre-alarm" for low levels of carbon monoxide, prompting ventilation before concentrations reach dangerous limits.
Multi-Environmental Sensing
Uniquely integrates temperature and humidity detection and reporting, offering comprehensive environmental monitoring alongside CO protection.
Wireless Interconnectivity
Supports wireless mutual reporting; when one alarm detects danger, all connected alarms sound simultaneously for whole-home coverage.
Smart Diagnostics & Control
Connects via Bluetooth for easy wireless extraction of device data, remote gateway alerts, and convenient one-touch alarm muting via the app.
Sleep-Friendly Design
Features LED indicator lights that automatically dim at night, a Sleep Easy mode to silence low battery warnings, and a crescendo test sound to avoid startling noises.
Key Specifications
Power SupplyBuilt-in DC 3V 10-Year Lithium Battery
Product Life10 Years
Wireless TechnologyBluetooth (BLE)
Alarm Volume85dB @ 3m
Dimension132mm x 69mm x 31mm
Compliance StandardBS EN 50291-1:2018, BS EN 50291-2:2019, NF292




















Usage Scenarios
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Living Room Safety
Ideal for living rooms with fireplaces or gas heaters, providing continuous monitoring and real-time display of CO levels.
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Mobile Protection
Certified for use in recreational vehicles and boats, ensuring reliable carbon monoxide detection wherever you travel.
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Advanced Smart Integration
Connects with your smart home gateway for remote monitoring, diagnostics, and app-based control, offering the ultimate smart safety experience.
Living Areas
RV & Marine
Smart Home
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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