The DH-301 is a professionally engineered carbon monoxide alarm developed by Hangzhou Deheng Smart Electric. It combines cutting-edge technology with user-friendly design to provide continuous monitoring and early warning against CO exposure.

Key Features of the DH-301 Carbon Monoxide Alarm:

· Advanced Electrochemical Sensor
Ensures precise detection of low CO concentrations, offering early alerts before levels become hazardous.

· Long-Lasting 3V AA Battery
Provides reliable power for up to 10 years, minimizing maintenance and ensuring uninterrupted operation.

· Automatic Dust-Proof Mechanism
Helps prevent false alarms and maintains sensor accuracy over time.

· High-Visibility TEST/SILENCE Button
Allows for easy testing and temporary muting of alarms for user convenience.

· Loud 85dB Alarm
Emits a clear, audible alert that can be heard from up to 3 meters away, ensuring the whole household is notified.

· 10-Year Product Service Life
Supported by a full 10-year guarantee, reflecting the product’s durability and long-term reliability.

· Low Battery and System Fault Alerts
Audible signals warn users of power loss or device malfunction, ensuring ongoing protection.

Understanding CE Certification: What It Means for Your Carbon Monoxide Alarm

The DH-301 complies with EN50291-1:2018, the European standard for residential carbon monoxide detectors. This CE certification is a mark of quality and safety. Here’s what it entails:

What Is CE Marking?
CE marking indicates that a product meets the strict health, safety, and environmental standards set by the European Union. For CO alarms, this means the device has been tested under realistic conditions to ensure it performs effectively when needed.

EN50291-1:2018 Certification Requirements:

· Detection Accuracy
The alarm must respond to specific CO concentrations within set time limits to provide timely warnings.

· Environmental Resilience
It must operate reliably in temperatures from -10°C to 40°C and humidity levels between 25% and 93% RH.

· Power Efficiency
The device must maintain low quiescent current (under 10µA) and stable performance during alarm activation (under 80mA).

· Audible Output
The alarm sound must exceed 85dB at 3 meters to ensure audibility in various home environments.

· Product Longevity
The alarm must demonstrate consistent performance throughout its declared service life—over 10 years for the DH-301.

Secure Your Home with a Certified CO Alarm

The DH-301 Carbon Monoxide Alarm from Hangzhou Deheng Smart Electric is more than a safety device—it’s a CE-certified solution designed for peace of mind. With its robust construction, intelligent features, and adherence to international standards, it offers trusted protection for your home and family.
By choosing a carbon monoxide alarm for home safety that meets EN50291-1:2018, you are investing in a product that has been rigorously tested for accuracy, durability, and performance.

Choose safety. Choose certainty. Choose the DH-301.