Updated November 2026
Data from the official Shelly and Zemismart sites.
2026 verdict
Zemismart ZM-GA100 Zigbee Gas Detector is the more complete option versus Shelly GAS (CNG) in 2026, helped most by price and alerts.
It separates itself most clearly on price and alerts, while still looking better on its broader overall balance. Shelly GAS (CNG) is still relevant if you care most about integrations, but Zemismart ZM-GA100 Zigbee Gas Detector is the stronger recommendation overall. That keeps the verdict firmly in favor of Zemismart ZM-GA100 Zigbee Gas Detector.
Connectivity
- Wi-Fi 2.4 GHz
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Winner
Works with
Connectivity
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| Feature | Shelly GAS (CNG) | Zemismart ZM-GA100 Zigbee Gas Detector | Winner |
|---|---|---|---|
| Price | £82.00 | $26.00 | Zemismart ZM-GA100 Zigbee Gas Detector |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Home Assistant | Shelly GAS (CNG) |
| Alerts | App Notifications, Fault Alerts | App Notifications, Voice Alerts, Low Battery Alerts | Zemismart ZM-GA100 Zigbee Gas Detector |
| Connectivity | 2.4 GHz WiFi | Zigbee | Tie |
| Detection | Natural Gas, Concentration Reading | Natural Gas, Concentration Reading | Tie |
| Digital Display | NO | NO | Tie |
| Interconnect | NO | NO | Tie |
| Local Control | YES | YES | Tie |
£82.00
- + Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant
- - Price: £82.00 vs $26.00
- - Alerts: App Notifications, Fault Alerts vs App Notifications, Voice Alerts, Low Battery Alerts
Winner
30% OFF
$26.00
$37.14
- + Price: $26.00
- + Alerts: App Notifications, Voice Alerts, Low Battery Alerts
- - Integrations: Home Assistant vs Google Home, Alexa, Samsung SmartThings, Home Assistant
Frequently Asked Questions
Which is better overall: Shelly GAS (CNG) or Zemismart ZM-GA100 Zigbee Gas Detector?
Zemismart ZM-GA100 Zigbee Gas Detector has the stronger overall profile in this comparison, especially for price and alerts.
What is the biggest difference between Shelly GAS (CNG) and Zemismart ZM-GA100 Zigbee Gas Detector?
Price is one of the clearest differences: Shelly GAS (CNG) lists £82.00, while Zemismart ZM-GA100 Zigbee Gas Detector lists $26.00.
Which one looks better on price?
Shelly GAS (CNG) is listed at £82.00, while Zemismart ZM-GA100 Zigbee Gas Detector is listed at $26.00. Zemismart ZM-GA100 Zigbee Gas Detector (better spec).
Who should buy Shelly GAS (CNG)?
Choose Shelly GAS (CNG) if your priority is integrations and that matters more than price.
Who should buy Zemismart ZM-GA100 Zigbee Gas Detector?
Choose Zemismart ZM-GA100 Zigbee Gas Detector if your priority is price and alerts and that matters more than integrations.
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- 7 Gas Detectors
- 45 specs compared
- 42 filters
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Multicolor Bulb E27 Gen3
- Motion Sensors
BLU Motion ZB
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