The Smart Device Compare comparison

Heiman Interconnected CO Alarm C1-R vs Heiman Matter Smoke Detector S1-TM

Understand the differences. Decide what matters to your home.

Before you compare every specification

Key differences between Heiman Interconnected CO Alarm C1-R and Heiman Matter Smoke Detector S1-TM

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 CO Alarm C1-R — Yes (Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway); Heiman Matter Smoke Detector S1-TM — No.
Fire Alerts (alerts): Heiman Interconnected CO Alarm C1-R — No; Heiman Matter Smoke Detector S1-TM — Yes (Local 85 dB alarm plus notifications through the Matter controller app).
Steam Check (features): Heiman Interconnected CO Alarm C1-R — No; Heiman Matter Smoke Detector S1-TM — Yes (Dual-beam sensing tells smoke apart from steam and cooking fumes to cut false alarms).
Alexa (integrations): Heiman Interconnected CO Alarm C1-R — No (Alexa has no carbon monoxide alarm device type outside Matter, and the C1-R is not a Matter device); Heiman Matter Smoke Detector S1-TM — Yes (Via Matter).

Specifications to check side by side

2.4 GHz Wi-Fi (connectivity): Heiman Interconnected CO Alarm C1-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); Heiman Matter Smoke Detector S1-TM — No.
Other (connectivity): Heiman Interconnected CO Alarm C1-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 S1-R so one alarm sets them all off); Heiman Matter Smoke Detector S1-TM — No.
Thread (connectivity): Heiman Interconnected CO Alarm C1-R — No; Heiman Matter Smoke Detector S1-TM — Thread Border Router required.
Automations (features): Heiman Interconnected CO Alarm C1-R — Heiman Gateway required (Automations run in the Heiman app or a linked platform once the gateway is added); Heiman Matter Smoke Detector S1-TM — Yes (Local Matter automations, no cloud required).

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 CO Alarm C1-R

Last updated October 2026

View full device profile

Option 2 · Heiman

Heiman Matter Smoke Detector S1-TM

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.

18differences with recorded values for every device

1rows with missing or unspecified information

Consider your setup

Apple Home

Heiman Interconnected CO Alarm C1-RNo
Heiman Matter Smoke Detector S1-TMYes

Confirm which features appear in Apple Home and whether extra hardware or a subscription is needed for your intended use.

Inspect the specifications

Consider your setup

Home Assistant

Heiman Interconnected CO Alarm C1-RHeiman Gateway required
Heiman Matter Smoke Detector S1-TMYes

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

Matter

Heiman Interconnected CO Alarm C1-RNo
Heiman Matter Smoke Detector S1-TMYes

Confirm the exact device type and the features exposed in your chosen platform. Protocol support does not establish feature parity across apps.

Inspect the specifications

Consider your setup

Battery Life

Heiman Interconnected CO Alarm C1-R10 years
Heiman Matter Smoke Detector S1-TM3.5 years

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 CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Co Alerts

Heiman Interconnected CO Alarm C1-R: Yes
Catalog note
Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway
Heiman Matter Smoke Detector S1-TM: No

Fire Alerts

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Local 85 dB alarm plus notifications through the Matter controller app

Low Battery Alerts

Heiman Interconnected CO Alarm C1-R: Yes
Heiman Matter Smoke Detector S1-TM: Yes

Temperature Alerts

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Connectivity

2.4 GHz Wi-Fi

Heiman Interconnected CO Alarm C1-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
Heiman Matter Smoke Detector S1-TM: No

5 GHz Wi-Fi

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Bluetooth

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Other

Heiman Interconnected CO Alarm C1-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 S1-R so one alarm sets them all off
Heiman Matter Smoke Detector S1-TM: No

Thread

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Thread Border Router required

Z Wave

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Zigbee

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Display

Screen

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Screen Type

Heiman Interconnected CO Alarm C1-R: Not applicable / unspecified
Heiman Matter Smoke Detector S1-TM: Not applicable / unspecified

Features

Automations

Heiman Interconnected CO Alarm C1-R: Heiman Gateway required
Catalog note
Automations run in the Heiman app or a linked platform once the gateway is added
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Local Matter automations, no cloud required

Built In Light

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Built In Siren

Heiman Interconnected CO Alarm C1-R: Yes
Catalog note
85 dB at 10 ft
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
85 dB at 10 ft

Pathlight

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Steam Check

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Dual-beam sensing tells smoke apart from steam and cooking fumes to cut false alarms

Tests Itself

Heiman Interconnected CO Alarm C1-R: Yes
Catalog note
Continuous sensor, RF link and battery self-diagnostics, plus a test and silence button
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Push to test button, and the test can be triggered remotely from Home Assistant

Integrations

Alexa

Heiman Interconnected CO Alarm C1-R: No
Catalog note
Alexa has no carbon monoxide alarm device type outside Matter, and the C1-R is not a Matter device
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Via Matter

Apple Home

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Via Matter

Google Home

Heiman Interconnected CO Alarm C1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Via Matter

Home Assistant

Heiman Interconnected CO Alarm C1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Via Matter

Matter

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Matter 1.4 over Thread; Heiman holds CSA Matter certificates for its smoke sensors with temperature and humidity reporting

SmartThings

Heiman Interconnected CO Alarm C1-R: Heiman Gateway required
Catalog note
Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Via Matter

Power

Battery Life

Heiman Interconnected CO Alarm C1-R: 10 years
Heiman Matter Smoke Detector S1-TM: 3.5 years

Battery Type

Heiman Interconnected CO Alarm C1-R: CR123A
Heiman Matter Smoke Detector S1-TM: CR123A

Wired

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Sensors

Air Quality

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Ambient Light

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Heiman Interconnected CO Alarm C1-R: Yes
Catalog note
Japan-made FIGARO TGS5141 electrochemical sensor, UL 2034 5th Edition
Heiman Matter Smoke Detector S1-TM: No

Humidity

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Built-in humidity sensor reported over Matter

Motion

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Occupancy

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: No

Smoke

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Dual-beam photoelectric sensor, UL 217 10th Edition certified

Temperature

Heiman Interconnected CO Alarm C1-R: No
Heiman Matter Smoke Detector S1-TM: Yes
Catalog note
Built-in temperature sensor reported over Matter

Specifications for Heiman Interconnected CO Alarm C1-R versus Heiman Matter Smoke Detector S1-TM
Specification	Heiman Interconnected CO Alarm C1-R	Heiman Matter Smoke Detector S1-TM
Alerts
Air Quality Alerts	No	No
Co Alerts	Yes Catalog note Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway	No
Fire Alerts	No	Yes Catalog note Local 85 dB alarm plus notifications through the Matter controller app
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	No
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 S1-R so one alarm sets them all off	No
Thread	No	Thread Border Router required
Z Wave	No	No
Zigbee	No	No
Display
Screen	No	No
Screen Type	Not applicable / unspecified	Not applicable / unspecified
Features
Automations	Heiman Gateway required Catalog note Automations run in the Heiman app or a linked platform once the gateway is added	Yes Catalog note Local Matter automations, no cloud required
Built In Light	No	No
Built In Siren	Yes Catalog note 85 dB at 10 ft	Yes Catalog note 85 dB at 10 ft
Pathlight	No	No
Steam Check	No	Yes Catalog note Dual-beam sensing tells smoke apart from steam and cooking fumes to cut false alarms
Tests Itself	Yes Catalog note Continuous sensor, RF link and battery self-diagnostics, plus a test and silence button	Yes Catalog note Push to test button, and the test can be triggered remotely from Home Assistant
Integrations
Alexa	No Catalog note Alexa has no carbon monoxide alarm device type outside Matter, and the C1-R is not a Matter device	Yes Catalog note Via Matter
Apple Home	No	Yes Catalog note Via Matter
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	Yes Catalog note Via Matter
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 Via Matter
Matter	No	Yes Catalog note Matter 1.4 over Thread; Heiman holds CSA Matter certificates for its smoke sensors with temperature and humidity reporting
SmartThings	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 Via Matter
Power
Battery Life	10 years	3.5 years
Battery Type	CR123A	CR123A
Wired	No	No
Sensors
Air Quality	No	No
Ambient Light	No	No
Co	Yes Catalog note Japan-made FIGARO TGS5141 electrochemical sensor, UL 2034 5th Edition	No
Humidity	No	Yes Catalog note Built-in humidity sensor reported over Matter
Motion	No	No
Occupancy	No	No
Smoke	No	Yes Catalog note Dual-beam photoelectric sensor, UL 217 10th Edition certified
Temperature	No	Yes Catalog note Built-in temperature sensor reported over Matter

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