Data from Amazon and official Heiman site.
2026 verdict
In 2026, the recommendation leans toward Heiman Interconnected Smoke Alarm S1-R over Heiman HS1SA Series Smoke Alarm, driven by connectivity, integrations, and tests itself.
Its clearest strengths are connectivity, integrations, and tests itself, and it still looks stronger on steam check. Heiman HS1SA Series Smoke Alarm is still relevant if you care most about price, rating, and battery life, but Heiman Interconnected Smoke Alarm S1-R is the stronger recommendation overall. That is why Heiman Interconnected Smoke Alarm S1-R wins the verdict here.
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| Feature | Heiman HS1SA Series Smoke Alarm | Heiman Interconnected Smoke Alarm S1-R | Winner |
|---|---|---|---|
| Price | £16.14 | $25.99 | Heiman HS1SA Series Smoke Alarm |
| Rating | 4.5 | 4.2 | Heiman HS1SA Series Smoke Alarm |
| Battery Life | 10 years | 8.3 years | Heiman HS1SA Series Smoke Alarm |
| Connectivity | Zigbee | 2.4 GHz WiFi, Other | Heiman Interconnected Smoke Alarm S1-R |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Samsung SmartThings, Home Assistant | Heiman Interconnected Smoke Alarm S1-R |
| Built-in Light | YES | NO | Heiman HS1SA Series Smoke Alarm |
| Tests Itself | NO | YES | Heiman Interconnected Smoke Alarm S1-R |
| Steam Check | NO | YES | Heiman Interconnected Smoke Alarm S1-R |
| Screen | NO | NO | Tie |
| Sensors | Smoke | Smoke | Tie |
| Alerts | Fire Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | Tie |
| Built-in Siren | YES | YES | Tie |
5% OFF
£16.14
£16.99
- + Price: £16.14
- + Rating: 4.5
- + Battery Life: 10 years
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Other
- - Integrations: Samsung SmartThings, Home Assistant vs Google Home, Samsung SmartThings, Home Assistant
Winner
- + Connectivity: 2.4 GHz WiFi, Other
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- + Tests Itself: YES
- - Price: $25.99 vs £16.14
- - Rating: 4.2 vs 4.5
Frequently Asked Questions
Which is better overall: Heiman HS1SA Series Smoke Alarm or Heiman Interconnected Smoke Alarm S1-R?
Heiman Interconnected Smoke Alarm S1-R has the stronger overall profile in this comparison, especially for connectivity, integrations, and tests itself.
What is the biggest difference between Heiman HS1SA Series Smoke Alarm and Heiman Interconnected Smoke Alarm S1-R?
Price is one of the clearest differences: Heiman HS1SA Series Smoke Alarm lists £16.14, while Heiman Interconnected Smoke Alarm S1-R lists $25.99.
Which one looks better on price?
Heiman HS1SA Series Smoke Alarm is listed at £16.14, while Heiman Interconnected Smoke Alarm S1-R is listed at $25.99. Heiman HS1SA Series Smoke Alarm (better spec).
Who should buy Heiman HS1SA Series Smoke Alarm?
Choose Heiman HS1SA Series Smoke Alarm if your priority is price and rating and that matters more than connectivity.
Who should buy Heiman Interconnected Smoke Alarm S1-R?
Choose Heiman Interconnected Smoke Alarm S1-R if your priority is connectivity and integrations and that matters more than price.
Full comparison table
Compare all 24 Smoke & CO Detectors side by side
You are looking at two of them. The full table lines up all Smoke & CO Detectors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 24 Smoke & CO Detectors
- 44 specs compared
- 41 filters
YoLinkPhotoelectric Smoke Alarm
$49.99
HeimanMatter Smoke Detector S1-TM
$49.98
X-SenseWi-Fi CO Alarm
X-SenseSC07-MR Smart Smoke & CO Alarm
- Heiman
HS1SA Series Smoke Alarm
5% OFF£16.99£16.14 
X-SenseWiFi Smoke & CO Detector
X-SenseWi-Fi Smoke Alarm
GoogleNest Protect (Battery)
$406.99
GoogleNest Protect (Wired)
$449.99
ShellySmoke Alarm
25% OFF€53.43€39.95
X-SenseXC0M-iR Smart Carbon Monoxide Alarm with Voice Alerts
AqaraSmart Smoke Detector
16% OFF€44.99€37.99
KiddeSmart Smoke & CO Detector with Ring
$69.97
HeimanInterconnected Smoke Alarm S1-R
$25.99
HeimanInterconnected CO Alarm C1-R
10% OFF$29.98$26.99
First AlertSC5 Battery Smart Smoke & CO Alarm
HeimanSmart CO Alarm
20% OFF$59.99$47.99
HeimanMatter Smoke Detector S1-M
$39.99
First AlertSMCO410 Smoke Detector & CO Alarm
$64.98
KiddeSmart Smoke + Indoor Air Quality Alarm
$106.56
Door & Window SensorsHeimanWindow Door Alarm
4.0(148)$19.98
Gas DetectorsHeimanHS1CG Series Combustible Gas Sensor
Gas DetectorsHeimanWS2CG Series Combustible Gas Detector
Motion SensorsHeimanSmart Motion Sensor
3.2(32)$23.99
Motion SensorsHeimanWiFi Smart Motion Sensor
2.8(43)$12.98
SirensHeimanSmart Siren HS2WD series
$79.99- Smoke & CO DetectorsHeiman
HS1SA Series Smoke Alarm
4.5(5,145)5% OFF£16.99£16.14 - Smoke & CO DetectorsHeiman
Interconnected CO Alarm C1-R
4.0(24)10% OFF$29.98$26.99 - Smoke & CO DetectorsHeiman
Interconnected Smoke Alarm S1-R
4.2(204)$25.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-M
3.6(77)$39.99 - Smoke & CO DetectorsHeiman
Matter Smoke Detector S1-TM
5.0(4)$49.98 - Smoke & CO DetectorsHeiman
Smart CO Alarm
3.7(21)20% OFF$59.99$47.99 
Vibration SensorsHeimanSmart Vibration Sensor HS1VS series
$14.90
Water Leak SensorsHeimanSmart Water Leakage Sensor
4.2(40)20% OFF$19.99$15.99