The Smart Device Compare comparison

Heiman HS1CG Series Combustible Gas Sensor vs Shelly GAS (LPG)

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Heiman HS1CG Series Combustible Gas Sensor and Shelly GAS (LPG)

A summary of selected recorded differences between these gas detectors. Check the full specification table below for details and conditions.

Feature differences among your selected devices

2.4 GHz Wi-Fi (connectivity): Heiman HS1CG Series Combustible Gas Sensor — No; Shelly GAS (LPG) — Yes (802.11 b/g/n, 2400-2484 MHz, no hub required).
Concentration Reading (detection): Heiman HS1CG Series Combustible Gas Sensor — No (Reports a binary alarm state over Zigbee, not a concentration value); Shelly GAS (LPG) — Yes (The device reports the measured concentration in ppm through the app and the local API).
Natural Gas (detection): Heiman HS1CG Series Combustible Gas Sensor — Yes; Shelly GAS (LPG) — No (Shelly sells a separate CNG version for pipeline natural gas).
Alexa (integrations): Heiman HS1CG Series Combustible Gas Sensor — No (Neither the Alexa smart home API nor the Google Home SensorState trait defines a combustible gas sensor type, so the alarm cannot be exposed to it); Shelly GAS (LPG) — Yes.

Specifications to check side by side

Zigbee (connectivity): Heiman HS1CG Series Combustible Gas Sensor — Zigbee Hub required; Shelly GAS (LPG) — No.

Information still to confirm

9 of 37 comparison fields lack a resolved value for at least one selected device. Missing information is not evidence that a feature is absent.
Check the full table and manufacturer documentation before ruling out a device.

These observations are derived from recorded catalog data and have not all been independently verified. Confirm details with the manufacturer before purchasing.

Compare capabilities, compatibility and setup requirements.

Option 1 · Heiman

Heiman HS1CG Series Combustible Gas Sensor

Catalog update date not recorded

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Option 2 · Shelly

Shelly GAS (LPG)

Catalog update date not recorded

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What the catalog tells us

Understand the tradeoffs.

These counts describe the available data, not a quality score. More features do not automatically make a better device.

6differences with recorded values for every device

9rows with missing or unspecified information

Your priorities, side by side

Focus on what changes.

Mark the specifications you care about. Open manufacturer sources for verification scope; fields without citations remain catalog data. Expand notes for other qualifications.

Differences onlyMy priorities (0)

Showing 37 of 37 rows. “Not recorded” does not mean “No”.

Reading layout

Alerts

Alarm Volume

Heiman HS1CG Series Combustible Gas Sensor: 70 dB
Shelly GAS (LPG): 70 dB

App Notifications

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Alarms are pushed through the hub the detector is paired with
Shelly GAS (LPG): Yes

Fault Alerts

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Dedicated yellow fault LED next to the green power and red alarm indicators
Shelly GAS (LPG): Yes
Catalog note
The sensor state is reported as warmup, normal, fault or unknown

Low Battery Alerts

Heiman HS1CG Series Combustible Gas Sensor: Not applicable / unspecified
Shelly GAS (LPG): Not applicable / unspecified

Voice Alerts

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Connectivity

2.4 GHz Wi-Fi

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): Yes
Catalog note
802.11 b/g/n, 2400-2484 MHz, no hub required

5 GHz Wi-Fi

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Bluetooth

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Other

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Thread

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Z Wave

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Zigbee

Heiman HS1CG Series Combustible Gas Sensor: Zigbee Hub required
Shelly GAS (LPG): No

Detection

Alarm Threshold

Heiman HS1CG Series Combustible Gas Sensor: 6% LEL
Shelly GAS (LPG): 6% LEL

Carbon Monoxide

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Concentration Reading

Heiman HS1CG Series Combustible Gas Sensor: No
Catalog note
Reports a binary alarm state over Zigbee, not a concentration value
Shelly GAS (LPG): Yes
Catalog note
The device reports the measured concentration in ppm through the app and the local API

Lpg Propane

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
The manual covers natural gas and LPG, with different mounting heights for each
Shelly GAS (LPG): Yes
Catalog note
Calibrated for liquefied petroleum gas

Natural Gas

Heiman HS1CG Series Combustible Gas Sensor: Yes
Shelly GAS (LPG): No
Catalog note
Shelly sells a separate CNG version for pipeline natural gas

Sensor Life

Heiman HS1CG Series Combustible Gas Sensor: 5 years
Shelly GAS (LPG): Not recorded

Sensor Type

Heiman HS1CG Series Combustible Gas Sensor: Not recorded
Shelly GAS (LPG): Not recorded

Features

Automations

Heiman HS1CG Series Combustible Gas Sensor: Yes
Shelly GAS (LPG): Yes
Catalog note
Scenes can react to the alarm and drive any other Shelly device

Certification

Heiman HS1CG Series Combustible Gas Sensor: CE (EN 50270)
Shelly GAS (LPG): Not recorded

Digital Display

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

History Records

Heiman HS1CG Series Combustible Gas Sensor: Not recorded
Shelly GAS (LPG): Not recorded

Interconnect

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Mute Silence

Heiman HS1CG Series Combustible Gas Sensor: Not recorded
Shelly GAS (LPG): Yes
Catalog note
Mute and unmute the sounder remotely

Self Test

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Push-to-test button on the front of the unit
Shelly GAS (LPG): Yes
Catalog note
Self-test can be triggered from the app or the local API

Valve Shut Off

Heiman HS1CG Series Combustible Gas Sensor: Not recorded
Shelly GAS (LPG): Yes
Catalog note
11-13V 500mA jack output drives the Shelly Gas Add-on valve manipulator, which is sold separately

Integrations

Alexa

Heiman HS1CG Series Combustible Gas Sensor: No
Catalog note
Neither the Alexa smart home API nor the Google Home SensorState trait defines a combustible gas sensor type, so the alarm cannot be exposed to it
Shelly GAS (LPG): Yes

Apple Home

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Google Home

Heiman HS1CG Series Combustible Gas Sensor: No
Catalog note
Neither the Alexa smart home API nor the Google Home SensorState trait defines a combustible gas sensor type, so the alarm cannot be exposed to it
Shelly GAS (LPG): Yes

Home Assistant

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Supported by Zigbee2MQTT, so it works through any Zigbee coordinator Home Assistant controls
Shelly GAS (LPG): Yes
Catalog note
Local control over the HTTP, MQTT and CoAP APIs

Matter

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

SmartThings

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Standard Zigbee HA1.2 device, listed by Heiman resellers as working with SmartThings
Shelly GAS (LPG): Yes

Power

Battery Backup

Heiman HS1CG Series Combustible Gas Sensor: No
Shelly GAS (LPG): No

Battery Life

Heiman HS1CG Series Combustible Gas Sensor: Not applicable / unspecified
Shelly GAS (LPG): Not applicable / unspecified

Battery Type

Heiman HS1CG Series Combustible Gas Sensor: Not applicable / unspecified
Shelly GAS (LPG): Not applicable / unspecified

Wired

Heiman HS1CG Series Combustible Gas Sensor: Yes
Catalog note
Mains powered, AC 100V-240V
Shelly GAS (LPG): Yes
Catalog note
Plugs straight into a socket, 110-230V AC 50/60Hz, under 3 W

Specifications for Heiman HS1CG Series Combustible Gas Sensor versus Shelly GAS (LPG)
Specification	Heiman HS1CG Series Combustible Gas Sensor	Shelly GAS (LPG)
Alerts
Alarm Volume	70 dB	70 dB
App Notifications	Yes Catalog note Alarms are pushed through the hub the detector is paired with	Yes
Fault Alerts	Yes Catalog note Dedicated yellow fault LED next to the green power and red alarm indicators	Yes Catalog note The sensor state is reported as warmup, normal, fault or unknown
Low Battery Alerts	Not applicable / unspecified	Not applicable / unspecified
Voice Alerts	No	No
Connectivity
2.4 GHz Wi-Fi	No	Yes Catalog note 802.11 b/g/n, 2400-2484 MHz, no hub required
5 GHz Wi-Fi	No	No
Bluetooth	No	No
Other	No	No
Thread	No	No
Z Wave	No	No
Zigbee	Zigbee Hub required	No
Detection
Alarm Threshold	6% LEL	6% LEL
Carbon Monoxide	No	No
Concentration Reading	No Catalog note Reports a binary alarm state over Zigbee, not a concentration value	Yes Catalog note The device reports the measured concentration in ppm through the app and the local API
Lpg Propane	Yes Catalog note The manual covers natural gas and LPG, with different mounting heights for each	Yes Catalog note Calibrated for liquefied petroleum gas
Natural Gas	Yes	No Catalog note Shelly sells a separate CNG version for pipeline natural gas
Sensor Life	5 years	Not recorded
Sensor Type	Not recorded	Not recorded
Features
Automations	Yes	Yes Catalog note Scenes can react to the alarm and drive any other Shelly device
Certification	CE (EN 50270)	Not recorded
Digital Display	No	No
History Records	Not recorded	Not recorded
Interconnect	No	No
Mute Silence	Not recorded	Yes Catalog note Mute and unmute the sounder remotely
Self Test	Yes Catalog note Push-to-test button on the front of the unit	Yes Catalog note Self-test can be triggered from the app or the local API
Valve Shut Off	Not recorded	Yes Catalog note 11-13V 500mA jack output drives the Shelly Gas Add-on valve manipulator, which is sold separately
Integrations
Alexa	No Catalog note Neither the Alexa smart home API nor the Google Home SensorState trait defines a combustible gas sensor type, so the alarm cannot be exposed to it	Yes
Apple Home	No	No
Google Home	No Catalog note Neither the Alexa smart home API nor the Google Home SensorState trait defines a combustible gas sensor type, so the alarm cannot be exposed to it	Yes
Home Assistant	Yes Catalog note Supported by Zigbee2MQTT, so it works through any Zigbee coordinator Home Assistant controls	Yes Catalog note Local control over the HTTP, MQTT and CoAP APIs
Matter	No	No
SmartThings	Yes Catalog note Standard Zigbee HA1.2 device, listed by Heiman resellers as working with SmartThings	Yes
Power
Battery Backup	No	No
Battery Life	Not applicable / unspecified	Not applicable / unspecified
Battery Type	Not applicable / unspecified	Not applicable / unspecified
Wired	Yes Catalog note Mains powered, AC 100V-240V	Yes Catalog note Plugs straight into a socket, 110-230V AC 50/60Hz, under 3 W

Know what’s behind the comparison.

The table matches specifications by section and field. It preserves notes, separates missing data from explicit “No” values, and keeps qualifications attached to their values. No overall winner is assigned from feature counts.

Read our comparison methodology