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Heiman Interconnected Smoke Alarm S1-R

Heiman Interconnected Smoke Alarm S1-R

Dual-beam photoelectric sensing and 915 MHz interlinking in a tiny battery puck, with app alerts only through Heiman's gateway.

4.2
204 ratings
$25.99
1

One alarm per floor, plus one per bedroom.

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Launch Year: 2026

Model: S1-R

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Our review

Heiman S1-R Review: A Mini Smoke Alarm That Links Wirelessly Across the Whole Home

The verdict

The Heiman S1-R is a compact battery-powered photoelectric smoke alarm certified to UL 217 10th Edition that interconnects wirelessly with other Heiman RF alarms, so every unit sounds when one detects smoke. It needs no wiring, Wi-Fi or hub to do that, which makes it an easy whole-home upgrade for renters and older houses. Phone alerts and smart home links require the separate Heiman WS3GW-R gateway, and there is no Matter, Alexa or Apple Home support. At a budget-friendly price it is a simple way to add interlinked smoke protection.

Best for
  • Renters
  • Multi-level homes
  • Budget buyers
  • Retrofits without wiring
1

One alarm per floor, plus one per bedroom.

Buy on Amazon USACheck price

Pros

  • Dual-beam photoelectric sensor, UL 217 10th Edition
  • Wireless 915 MHz interlink with other Heiman smoke and CO alarms
  • Tiny, tool-free magnetic or screw mounting
  • Battery rated for about 8.3 years
  • Optional gateway adds app alerts, Google Home, SmartThings and Home Assistant

Cons

  • Smart features require the separate Heiman gateway
  • No Matter, Alexa or Apple Home support
  • Detects smoke only, not carbon monoxide
  • No display

Who is the Heiman S1-R for?

It suits homes that need smoke alarms that talk to each other but have no interconnect wiring: older houses, apartments, rentals and dorms. It mounts in minutes with screws or magnetic adhesive pads, runs on a CR123A lithium battery that Heiman rates for about 8.3 years, and is small enough to disappear on a bedroom ceiling.

What the Heiman S1-R offers

The dual-beam photoelectric chamber sizes smoke particles, which helps it respond to smoldering fires while filtering out steam and cooking fumes, and it is certified to the UL 217 10th Edition standard that added cooking nuisance tests. The 915 MHz radio links it with other Heiman RF alarms, including the C1-R carbon monoxide alarm, up to 800 ft in open areas according to Heiman, and alarms can be split into separate groups. It sounds an 85 dB buzzer, runs continuous self-monitoring and warns when the battery runs low.

What to know before you buy

Out of the box the S1-R is an interconnected alarm, not a connected one: it has no app, no Wi-Fi and no Matter radio. Push notifications, remote silencing and links to Google Home, SmartThings or Home Assistant need the Heiman WS3GW-R gateway, bought separately or in a kit. Alexa and Apple Home are not supported, it has no display, and it detects smoke only, so a separate CO alarm is still needed near fuel-burning appliances.

Is the Heiman S1-R worth it?

For whole-home interlinked smoke protection without an electrician it is good value: modern photoelectric sensing, a long battery rating and a network you can grow with Heiman RF smoke and CO alarms. Buyers who want alerts in Apple Home or Alexa should choose a Matter model such as the Heiman S1-M instead.

Frequently asked questions

Does the Heiman S1-R connect to Wi-Fi or an app?

Not by itself. The alarms interconnect with each other over a 915 MHz radio. For phone alerts and smart home integrations you add the Heiman WS3GW-R gateway, which joins a 2.4 GHz Wi-Fi network.

Can the Heiman S1-R interconnect with carbon monoxide alarms?

Yes. It links with other Heiman RF alarms such as the C1-R CO alarm, so any hazard sets off every linked unit.

Does the Heiman S1-R work with Alexa or Apple Home?

No. It has no Matter radio and neither platform supports it. Through the Heiman gateway it can reach Google Home, SmartThings and Home Assistant.

What battery does the Heiman S1-R use?

A CR123A lithium battery that Heiman rates for about 8.3 years on this model. The alarm chirps when the battery runs low.

At a glance

Summary

Everything this smoke & co detector supports, grouped by category.

Size & Materials
Ø2.8 × 1.5 in (Ø70 × 37 mm)
Connectivity
2.4 GHz WiFi (Heiman Gateway required)
Integrations
Google Home (Heiman Gateway required)Samsung SmartThings (Heiman Gateway required)Home Assistant (Heiman Gateway required)
Sensors
Smoke
Alerts
Fire AlertsLow Battery Alerts
Features
Built-in SirenTests ItselfSteam Check

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Company
Heiman logo

Heiman

4.4/ 5 avg ratingChina flagHeadquartered in China

Heiman is a Chinese manufacturer of smart safety and security sensors, including smoke alarms, gas detectors, water leak sensors and door/window contacts. The company produces Zigbee and Z-Wave devices used across many smart home hubs and is a common original equipment supplier for other brands. Heiman focuses on affordable, safety-oriented sensors for home automation.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Dimensions

Ø2.8 × 1.5 in (Ø70 × 37 mm)

Weight

?

Power
Wired

NO

Battery Type

CR123A

Battery Life

8.3 years

Connectivity
2.4 GHz WiFi

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

5 GHz WiFi

NO

Bluetooth

NO

Zigbee

NO

Z-Wave

NO

Thread Protocol

NO

Other

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

Integrations
Google Home

Heiman Gateway required

Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings

Alexa

NO

Alexa has no smoke alarm device type outside Matter, and the S1-R is not a Matter device

Apple HomeKit

NO

Samsung SmartThings

Heiman Gateway required

Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings

Home Assistant

Heiman Gateway required

Through the Heiman WS3GW-R gateway, which Heiman says works with Home Assistant, IFTTT, Google Home and SmartThings

Matter

NO

Display
Screen

NO

Screen Type

-

Sensors
Smoke

YES

Dual-beam photoelectric sensor, UL 217 10th Edition

CO

NO

Occupancy

NO

Temperature

NO

Humidity

NO

Air Quality

NO

Ambient Light

NO

Motion

NO

Alerts
Fire Alerts

YES

Local 85 dB alarm on every linked unit, plus app push alerts when paired to the Heiman gateway

CO Alerts

NO

Low Battery Alerts

YES

Temperature Alerts

NO

Air Quality Alerts

NO

Features
Built-in Siren

YES

85 dB at 10 ft

Built-in Light

NO

Tests Itself

YES

Continuous RF heartbeat and optical chamber drift monitoring, plus a test and silence button

Pathlight

NO

Steam Check

YES

Dual-beam photoelectric sensing sizes smoke particles to reduce steam and cooking false alarms

Automations

Heiman Gateway required

Automations run in the Heiman app or a linked platform once the gateway is added

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