HY-GC21B-W2-868 - The wireless detector accurately detects carbon monoxide thanks to the integrated electrochemical sensor. Equipped with an 85 dB acoustic alarm, LCD display, communication on 868 MHz with AES128 encryption and 3-year autonomy with CR123A battery, it is ideal for indoor environments. EN 50291 and TÜV certified, it guarantees continuous security and real-time notifications via DMSS app. - Dahua
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HY-GC21B-W2-868 | WIRELESS CARBON MONOXIDE DETECTOR

The Dahua HY-GC21B-W2-868 is a wireless carbon monoxide (CO) detector designed to ensure safety in indoor environments such as homes, hotels and restaurants. Equipped with a high-performance electrochemical sensor, it accurately detects CO leaks and activates visual and audible alarms when concentrations reach dangerous thresholds. The device communicates on 868 MHz frequency with AES128 encryption and supports real-time notifications via the DMSS app. Easy to install on the wall, it offers a 3-year autonomy with a replaceable CR123A battery.
Further details
Technical data sheet
MODEL | EAP6218-C |
Working Principle | |
Collection Type | Carbon monoxide (CO) |
Sensor Type | Electrochemical |
Alarm | |
Alarm Type | CO alarm, fault warning, low battery warning |
Alarm Volume | Over 85dB (A) at 3 m (9.84 ft) |
Alarm Mode | Visual and audible alarm |
Silence Function | Support |
Silence Duration | About 45 seconds |
Alarm Response Threshold | 50 ppm: 60 min–90 min 100 ppm: 10 min–40 min 300 ppm: < 3 min |
Wireless | |
Carrier Frequency | 868MHz |
Communication Distance | Up to 1000 m (3280.84 ft) in an open space |
Frequency Hopping | Yes |
Encryption Mode | AES128 |
Basic Parameters | |
Display | LCD |
Indicator Light | LED (red/yellow/green) |
LED Instructions | Alarm: Red indicator Fault: Yellow indicator Power: Green indicator |
Power Supply | |
Battery Life | 3 years |
Power Source | 3V CR123A lithium battery (replaceable) |
Operating Current | Monitoring Current: ≤20uA Alarm Current: ≤10mA |
Operating Environment | |
Operating Environment | Indoor use only |
Operating Temperature | –10°C to +40°C (+14°F to +104°F) |
Operating Humidity | ≤95% RH (non-condensing) |
Appearance | |
Color | White |
Material | PC + ABS |
Dimensions | 116.4 mm × 71.7 mm × 28.3 mm (4.58" × 2.82" × 1.11") |
Weight | 125 g |
Installation | Wall Mount |
Certification | |
Certifications | TÜV and CE listed |
Compliance Standard | EN 50291-1:2018, EN 50291-2:2019 |