Shelly Gas CNG — WiFi Natural Gas Detector

Shelly Gas CNG — WiFi Natural Gas Detector

The Shelly Gas CNG is a WiFi natural gas (methane) detector with direct power supply to the electrical grid. It emits an audible alarm of over 70 dB when it detects gas levels above 6% LEL (Lower Explosive Limit). Real-time mobile notifications.

• Gas detected: CNG — Natural Gas (methane)
• Connectivity: WiFi 802.11 b/g/n (2.4 GHz)
• Power supply: 110-230V AC (direct connection to mains)
• Detection threshold: 6% LEL
• Audible alarm: >70 dB
• Operating temperature: -10°C to +50°C
• Dimensions: 89.5 × 89.5 × 38 mm
• Weight: 183 g
• Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, mJS Scripting

Use cases

• Detection of natural gas leaks in kitchens, boilers, and risk areas
• Immediate local audible alarm and remote mobile notification
• Automation: automatic shut-off of solenoid valves when gas is detected with Home Assistant
• Installation in homes, commercial premises, and garages with natural gas

Integrations: Home Assistant (local, no cloud), Amazon Alexa, Google Home, MQTT, HTTP REST API. No hub or subscriptions.

• RF Band: 2400 - 2495 MHz
• Max RF Power: <20 dBm
• Wi-Fi Protocol: 802.11 b/g/n (2.4 GHz)
• Wi-Fi Range: Up to 30 m indoors / 50 m outdoors
• No Bluetooth

Official Knowledge Base

Shelly Gas — Official Documentation

Installation Guides

Gas, H&T and Flood Sensors

API and Technical Documentation

All Shelly devices and services

Certifications and Compliance

CE, RoHS — Shelly Gas Certifications