The Smart Device Compare comparison

Heiman Interconnected Smoke Alarm S1-R vs X-Sense Wi-Fi Carbon Monoxide Alarm

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Heiman Interconnected Smoke Alarm S1-R and X-Sense Wi-Fi Carbon Monoxide Alarm

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

Feature differences among your selected devices

Co Alerts (alerts): Heiman Interconnected Smoke Alarm S1-R — No; X-Sense Wi-Fi Carbon Monoxide Alarm — Yes.
Fire Alerts (alerts): Heiman Interconnected Smoke Alarm S1-R — Yes (Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway); X-Sense Wi-Fi Carbon Monoxide Alarm — No.
Screen (display): Heiman Interconnected Smoke Alarm S1-R — No; X-Sense Wi-Fi Carbon Monoxide Alarm — Yes.
Built In Light (features): Heiman Interconnected Smoke Alarm S1-R — No; X-Sense Wi-Fi Carbon Monoxide Alarm — Yes.

Specifications to check side by side

2.4 GHz Wi-Fi (connectivity): Heiman Interconnected Smoke Alarm S1-R — Heiman Gateway required (The alarm itself has no Wi-Fi: the optional WS3GW-R gateway joins a 2.4 GHz network and relays its alerts to the Heiman app); X-Sense Wi-Fi Carbon Monoxide Alarm — Yes (IEEE 802.11b/g/n).
Other (connectivity): Heiman Interconnected Smoke Alarm S1-R — RF wireless interconnect (915 MHz Sub-1G radio, up to 800 ft in open areas per Heiman; links with other Heiman RF alarms such as the C1-R CO alarm); X-Sense Wi-Fi Carbon Monoxide Alarm — No.
Automations (features): Heiman Interconnected Smoke Alarm S1-R — Heiman Gateway required (Automations run in the Heiman app or a linked platform once the gateway is added); X-Sense Wi-Fi Carbon Monoxide Alarm — No.
Google Home (integrations): Heiman Interconnected Smoke Alarm S1-R — Heiman Gateway required (Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings); X-Sense Wi-Fi Carbon Monoxide Alarm — No.

Information still to confirm

1 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 Interconnected Smoke Alarm S1-R

Last updated October 2026

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Option 2 · X-Sense

X-Sense Wi-Fi Carbon Monoxide Alarm

Last updated October 2026

View full device profile

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.

15differences with recorded values for every device

1rows with missing or unspecified information

Consider your setup

Home Assistant

Heiman Interconnected Smoke Alarm S1-RHeiman Gateway required
X-Sense Wi-Fi Carbon Monoxide AlarmYes

Check the integration method, supported model and firmware. A catalog Yes does not establish local control or official support.

Inspect the specifications

Consider your setup

Battery Life

Heiman Interconnected Smoke Alarm S1-R8.3 years
X-Sense Wi-Fi Carbon Monoxide Alarm1 year

Compare the stated test conditions. Catalog battery figures alone do not predict runtime in your home.

Inspect the specifications

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

Air Quality Alerts

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Co Alerts

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Fire Alerts

Heiman Interconnected Smoke Alarm S1-R: Yes
Catalog note
Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Low Battery Alerts

Heiman Interconnected Smoke Alarm S1-R: Yes
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Temperature Alerts

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Connectivity

2.4 GHz Wi-Fi

Heiman Interconnected Smoke Alarm S1-R: Heiman Gateway required
Catalog note
The alarm itself has no Wi-Fi: the optional WS3GW-R gateway joins a 2.4 GHz network and relays its alerts to the Heiman app
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes
Catalog note
IEEE 802.11b/g/n

5 GHz Wi-Fi

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Bluetooth

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Other

Heiman Interconnected Smoke Alarm S1-R: RF wireless interconnect
Catalog note
915 MHz Sub-1G radio, up to 800 ft in open areas per Heiman; links with other Heiman RF alarms such as the C1-R CO alarm
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Thread

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Z Wave

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Zigbee

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Display

Screen

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Screen Type

Heiman Interconnected Smoke Alarm S1-R: Not applicable / unspecified
X-Sense Wi-Fi Carbon Monoxide Alarm: LCD
Catalog note
The large LCD indicates how much carbon monoxide the alarm is detecting, ranging from 30 to 999 ppm.

Features

Automations

Heiman Interconnected Smoke Alarm S1-R: Heiman Gateway required
Catalog note
Automations run in the Heiman app or a linked platform once the gateway is added
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Built In Light

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Built In Siren

Heiman Interconnected Smoke Alarm S1-R: Yes
Catalog note
85 dB at 10 ft
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Pathlight

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Steam Check

Heiman Interconnected Smoke Alarm S1-R: Yes
Catalog note
Dual-beam photoelectric sensing sizes smoke particles to reduce steam and cooking false alarms
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Tests Itself

Heiman Interconnected Smoke Alarm S1-R: Yes
Catalog note
Continuous RF heartbeat and optical chamber drift monitoring, plus a test and silence button
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Integrations

Alexa

Heiman Interconnected Smoke Alarm S1-R: No
Catalog note
Alexa has no smoke alarm device type outside Matter, and the S1-R is not a Matter device
X-Sense Wi-Fi Carbon Monoxide Alarm: No
Catalog note
X-Sense confirms its smoke and CO alarms do not work with Alexa: only the AS05 and AS08 security kits are Alexa compatible, and Alexa's API has no smoke or CO alarm type anyway

Apple Home

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Google Home

Heiman Interconnected Smoke Alarm S1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Home Assistant

Heiman Interconnected Smoke Alarm S1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes
Catalog note
Community X-Sense integration for Home Assistant (HACS), which lists this model and reads it from the X-Sense cloud account

Matter

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

SmartThings

Heiman Interconnected Smoke Alarm S1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Power

Battery Life

Heiman Interconnected Smoke Alarm S1-R: 8.3 years
X-Sense Wi-Fi Carbon Monoxide Alarm: 1 year

Battery Type

Heiman Interconnected Smoke Alarm S1-R: CR123A
X-Sense Wi-Fi Carbon Monoxide Alarm: CR123A

Wired

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Sensors

Air Quality

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Ambient Light

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: Yes

Humidity

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Motion

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Occupancy

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Smoke

Heiman Interconnected Smoke Alarm S1-R: Yes
Catalog note
Dual-beam photoelectric sensor, UL 217 10th Edition
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Temperature

Heiman Interconnected Smoke Alarm S1-R: No
X-Sense Wi-Fi Carbon Monoxide Alarm: No

Specifications for Heiman Interconnected Smoke Alarm S1-R versus X-Sense Wi-Fi Carbon Monoxide Alarm
Specification	Heiman Interconnected Smoke Alarm S1-R	X-Sense Wi-Fi Carbon Monoxide Alarm
Alerts
Air Quality Alerts	No	No
Co Alerts	No	Yes
Fire Alerts	Yes Catalog note Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway	No
Low Battery Alerts	Yes	Yes
Temperature Alerts	No	No
Connectivity
2.4 GHz Wi-Fi	Heiman Gateway required Catalog note The alarm itself has no Wi-Fi: the optional WS3GW-R gateway joins a 2.4 GHz network and relays its alerts to the Heiman app	Yes Catalog note IEEE 802.11b/g/n
5 GHz Wi-Fi	No	No
Bluetooth	No	No
Other	RF wireless interconnect Catalog note 915 MHz Sub-1G radio, up to 800 ft in open areas per Heiman; links with other Heiman RF alarms such as the C1-R CO alarm	No
Thread	No	No
Z Wave	No	No
Zigbee	No	No
Display
Screen	No	Yes
Screen Type	Not applicable / unspecified	LCD Catalog note The large LCD indicates how much carbon monoxide the alarm is detecting, ranging from 30 to 999 ppm.
Features
Automations	Heiman Gateway required Catalog note Automations run in the Heiman app or a linked platform once the gateway is added	No
Built In Light	No	Yes
Built In Siren	Yes Catalog note 85 dB at 10 ft	Yes
Pathlight	No	No
Steam Check	Yes Catalog note Dual-beam photoelectric sensing sizes smoke particles to reduce steam and cooking false alarms	No
Tests Itself	Yes Catalog note Continuous RF heartbeat and optical chamber drift monitoring, plus a test and silence button	No
Integrations
Alexa	No Catalog note Alexa has no smoke alarm device type outside Matter, and the S1-R is not a Matter device	No Catalog note X-Sense confirms its smoke and CO alarms do not work with Alexa: only the AS05 and AS08 security kits are Alexa compatible, and Alexa's API has no smoke or CO alarm type anyway
Apple Home	No	No
Google Home	Heiman Gateway required Catalog note Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings	No
Home Assistant	Heiman Gateway required Catalog note Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings	Yes Catalog note Community X-Sense integration for Home Assistant (HACS), which lists this model and reads it from the X-Sense cloud account
Matter	No	No
SmartThings	Heiman Gateway required Catalog note Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings	No
Power
Battery Life	8.3 years	1 year
Battery Type	CR123A	CR123A
Wired	No	No
Sensors
Air Quality	No	No
Ambient Light	No	No
Co	No	Yes
Humidity	No	No
Motion	No	No
Occupancy	No	No
Smoke	Yes Catalog note Dual-beam photoelectric sensor, UL 217 10th Edition	No
Temperature	No	No

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