Low battery · X-Sense · smoke
X-Sense: One beep and one red flash every 60 seconds
Low battery. Each interlinked alarm gives its own warning, so the beeping one is the one to change.
- What you see
- One red flash about every 60 seconds
- What you hear
- One chirp about every 60 seconds
If it is sounding a full alarm instead: the maker’s emergency instruction
Smoke alarm
X-Sense: never ignore any alarm (XS01-WR manual). Check for signs of smoke or fire; if you see or smell smoke, evacuate immediately and call emergency services. If you are unsure what the hazard is, contact emergency services for guidance.
From Wireless Interlinked Smoke Alarm XS01-WR — User Manual and Smoke Detector Beeps and Sounds Decoded.
The X-Sense alarm on these pages senses smoke only. For a carbon monoxide alarm, follow its own maker’s instruction.
What X-Sense says to do about this signal
- Replace the battery immediately: twist the alarm off its bracket, pull the tab to take out the old CR123A, fit a new one the right way round, test, and twist it back on.
From Wireless Interlinked Smoke Alarm XS01-WR — User Manual. If your alarm’s pattern is not exactly this, check the manual for your model: X-Sense models do not all use the same signals.
Other X-Sense signals
Low battery on other brands
The same state sounds and looks different on each make — which is why a chirp pattern cannot be read without the brand.
Sources
Every line on this page comes from X-Sense’s own documents, read on the date shown. Nothing is taken from third-party code sites or other makes.
- X-Sense: Wireless Interlinked Smoke Alarm XS01-WR — User Manual — XS01-WR (UL 217 edition). download.x-sense.com Checked 2026-09-29.
- X-Sense: Smoke Detector Beeps and Sounds Decoded — X-Sense smoke alarms (general guide). www.x-sense.com Checked 2026-09-29.