The HY-GA20A-R8 - The standalone and interconnected wireless gas detector is designed for advanced methane (CH₄) leak monitoring in domestic and commercial environments such as homes, restaurants, and hotels. Thanks to its highly sensitive sensor, it quickly detects gas leaks with high accuracy and reduced false alarms, activating a powerful 70 dB audible alarm and visual LED indicators. Interconnected wireless technology allows up to 24 devices to be connected, ensuring simultaneous alarms across the entire network. Equipped with an End-of-Life function, it automatically signals the end of the sensor's life cycle, offering up to 5 years of operational autonomy. The compact wall-mounted design makes the device practical, reliable, and ideal for intelligent security systems. Dahua
HY-GA20A-R8 | Stand-alone Wireless Methane Gas Detector

The Dahua HY-GA20A-R8 gas detector is a professional standalone wireless device designed for the rapid detection of methane (CH₄) leaks in homes, hotels, restaurants and commercial environments. Thanks to the high-sensitivity sensor , it guarantees precise detections with reduced false alarms, activating a powerful 70 dB siren and immediate visual LED warnings. Interconnected wireless technology allows the connection of up to 24 devices , creating a synchronized alarm system for advanced protection. Equipped with an End of Life function, it automatically alerts when the sensor reaches the end of its operating cycle, ensuring maximum reliability for up to 5 years . The compact design with wall installation makes this detector ideal for intelligent and professional security systems.
Main specifications:
- Highly sensitive sensor for early detection of methane gas leaks with high performance and reduction of false alarms
- 70dB audible alarm with built-in LED indicators for immediate audible and visual notifications
- Interconnected wireless connection of up to 24 devices for a coordinated and reliable security system
- End of Life (EOL) function that automatically signals sensor replacement via buzzer and LED
- Sensor lifespan up to 5 years for stable and continuous operation over time
- Easy wall installation thanks to the compact design and resistant PC+ABS material structure
- Integrated relay output and valve output for advanced management of gas safety systems
Further details
Technical data sheet
| HY-GA20A-R8 | |
| Technical Specification | |
| Collection Type | Methane (CH₄) |
| Sampling Period | 200 ms |
| Working Principle | Semiconductor |
| Alarm Type | Gas alarm, fault warning, End of Life warning |
| Alarm Volume | 70 dB (A) at 1 m (3.28 ft) |
| Alarm Mode | Visual and audible alarm |
| Output | 1 valve output, 1 relay output |
| Silencing Function | Support |
| Indicator Light | Alarm, Fault, Power, and EoL |
| LED Instructions | Alarm: Red indicator Fault: Yellow indicator Power: Green indicator Eol: Yellow indicator |
| Operating Voltage | DC12V |
| Operating Environment | Indoor |
| Operating Temperature | –10°C to +55°C (+14°F to +131°F) |
| Operating Humidity | ≤ 95% RH (no condensation) |
| Communication | 868 MHz (-R8)/925 MHz (-R9) |
| Color | White |
| Casing | PC+ABS |
| Weight (with base) | 123 g (0.28 lb) |
| Dimensions (with base) | 118.0mm × 78.0mm × 33.7mm (4.65" × 3.07" × 1.33") |
| Installation | Wall Mount |
| Certification | CE, UKCA, PSTI |


