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Smoke & CO Detectors · Head to head

Heiman HS1SA-E Zigbee Smoke Alarm vs X-Sense Wi-Fi Carbon Monoxide Alarm

Full Smart Smoke & CO Detectors comparison in 2026

Updated October 2026
Data from Amazon and official Heiman and X-Sense sites.
2026 verdict
Smoke detection on Zigbee against carbon monoxide detection on Wi-Fi, and the Heiman HS1SA-E Zigbee Smoke Alarm takes the win on battery life and smart home reach.
Heiman HS1SA-E Zigbee Smoke Alarm
Winner
Heiman HS1SA-E Zigbee Smoke Alarm
€34.99
Buy on Amazon GermanyCheck price
Its CR123A cell is rated for 5 years against 1 year on the X-Sense, and it works with SmartThings and Home Assistant through a Zigbee hub and can drive automations. The X-Sense Wi-Fi Carbon Monoxide Alarm connects straight to Wi-Fi with no hub, shows the live CO reading on an LCD and carries a 5 year warranty, and it supports Home Assistant too. The catch is that they sense different hazards: the Heiman detects smoke only and the X-Sense detects carbon monoxide only, so neither replaces the other. Pick the Heiman HS1SA-E Zigbee Smoke Alarm for fire warnings in a Zigbee home, and add the X-Sense Wi-Fi Carbon Monoxide Alarm wherever gas appliances, boilers or a wood stove make CO the risk.
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FeatureHeiman HS1SA-E Zigbee Smoke AlarmX-Sense Wi-Fi Carbon Monoxide AlarmWinner
Price€34.99€39.87Heiman HS1SA-E Zigbee Smoke Alarm
Rating4.54.6X-Sense Wi-Fi Carbon Monoxide Alarm
Battery Life5 years1 yearHeiman HS1SA-E Zigbee Smoke Alarm
IntegrationsSamsung SmartThings, Home AssistantHome AssistantHeiman HS1SA-E Zigbee Smoke Alarm
ScreenNOYESX-Sense Wi-Fi Carbon Monoxide Alarm
ConnectivityZigbee2.4 GHz WiFiTie
SensorsSmokeCOTie
AlertsFire Alerts, Low Battery AlertsCO Alerts, Low Battery AlertsTie
Built-in SirenYESYESTie
Built-in LightYESYESTie
Tests ItselfNONOTie
PathlightNONOTie

What the differences mean

What it detects

This is the difference that decides it. The Heiman HS1SA-E Zigbee Smoke Alarm detects smoke and raises fire alerts; the X-Sense Wi-Fi Carbon Monoxide Alarm detects carbon monoxide only. A home with gas appliances usually needs both kinds.

Connection

The Heiman needs a Zigbee hub to send alerts anywhere beyond its own siren. The X-Sense joins 2.4 GHz Wi-Fi and pushes alerts to your phone with no hub.

Battery life

Both run on a CR123A cell, rated for 5 years in the Heiman and 1 year in the X-Sense, so the CO alarm needs a new battery every year.

Screen

The X-Sense Wi-Fi Carbon Monoxide Alarm shows the live CO level on an LCD, which tells you whether a reading is rising. The Heiman has only a status light.

Smart home

Both work with Home Assistant. The Heiman also works with SmartThings and supports automations; the X-Sense supports neither.

Which one to buy if

What owners say

Owners of both alarms praise a siren that is louder than they expected and a setup that takes minutes. Heiman HS1SA-E Zigbee Smoke Alarm owners single out how small and discreet it is, which suits bedrooms, hallways and campervans, and mounting by screws or an adhesive pad; their complaints are battery life that falls short of expectations, trouble finding the exact replacement cell and an adhesive mount that can loosen over time. X-Sense Wi-Fi Carbon Monoxide Alarm owners value fast Wi-Fi pairing, the LCD with a live CO reading instead of a simple pass or fail light, phone alerts while they are away, a freestanding design that needs no wall and a replaceable battery. They note an app and instructions not translated for every market and push notifications that can lag behind the reading on the screen.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Heiman HS1SA-E Zigbee Smoke Alarm
  • X-Sense Wi-Fi Carbon Monoxide Alarm

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Frequently Asked Questions

Which is better overall: Heiman HS1SA-E Zigbee Smoke Alarm or X-Sense Wi-Fi Carbon Monoxide Alarm?

The Heiman HS1SA-E Zigbee Smoke Alarm wins on battery life and smart home support, but they detect different things: smoke for the Heiman and carbon monoxide for the X-Sense Wi-Fi Carbon Monoxide Alarm. Most homes with fuel-burning appliances need both types.

What is the biggest difference between the Heiman HS1SA-E Zigbee Smoke Alarm and the X-Sense Wi-Fi Carbon Monoxide Alarm?

The hazard they sense. The Heiman HS1SA-E Zigbee Smoke Alarm is a smoke alarm with no CO sensor, and the X-Sense Wi-Fi Carbon Monoxide Alarm is a CO alarm with no smoke sensor.

Does the X-Sense Wi-Fi Carbon Monoxide Alarm need a hub?

No. It connects to 2.4 GHz Wi-Fi and sends alerts through the X-Sense app. The Heiman HS1SA-E Zigbee Smoke Alarm needs a Zigbee hub for remote alerts.

Do the Heiman HS1SA-E Zigbee Smoke Alarm and the X-Sense Wi-Fi Carbon Monoxide Alarm work with Home Assistant?

Yes, both do. The Heiman HS1SA-E Zigbee Smoke Alarm also works with SmartThings. Neither supports Alexa, Apple Home or Matter.

Who should buy the Heiman HS1SA-E Zigbee Smoke Alarm?

Zigbee smart home users who want a small, discreet smoke alarm with a long battery life for bedrooms, hallways or a campervan.

Who should buy the X-Sense Wi-Fi Carbon Monoxide Alarm?

Homes and rentals with gas or wood-burning appliances that want a CO alarm with a live reading and phone alerts, without a smart home hub.

Full comparison table

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