HomeGuard Carbon Monoxide & Smoke Combo Alarm With Digital CO Display
HomeGuard Carbon Monoxide & Smoke Combo Alarm With Digital CO Display
Details
One compact unit on the wall, two hazards covered — the HomeGuard alarm watches for both smoke and carbon monoxide around the clock, running on batteries so it keeps working even if the power goes out. A 4-digit LCD display shows the exact CO level being sensed, a steady green light confirms it's operating normally, and an 85 dB alarm is loud enough to be heard through a closed door if something's wrong.
What makes it work
- Two hazards, one alarm — smoke and carbon monoxide are both monitored continuously by a single compact unit, instead of needing separate detectors.
- Live CO readout — the optional 4-digit LCD shows the actual carbon monoxide level in real time, not just a pass/fail alert.
- Loud, clear alerts — an 85 dB alarm at 1 metre pairs with a pulsing red LED, so it's impossible to miss whether you're across the room or asleep down the hall.
How it responds
Detection speed scales with the danger: roughly 60–90 minutes at 50 ppm CO, 10–40 minutes at 100 ppm, and as fast as 3 minutes at 300 ppm. In everyday operation the green LED simply flashes every 30 seconds to confirm it's working; during an alarm, the red LED pulses and the unit cycles four short beeps, five seconds of quiet, then four more beeps, repeating until the air clears or the alarm is reset. A dedicated test/reset button lets you run a weekly check and clear the alarm afterward, and the unit chirps with an "Lb" reading on the display when batteries are running low, or an "Err" reading if it detects a malfunction.
Specifications
| Detection | Combined smoke and carbon monoxide |
| Display | Optional 4-digit LCD, shows live CO level |
| Alarm | 85 dB at 1 m, red LED during alarm, green LED in normal operation |
| Power | 3 x AA batteries (not included) |
| Standby current | Less than 50 μA |
| Alarm current | Less than 50 mA |
| Power consumption | Approximately 0.3 mW |
| Dimensions | 10 x 4 cm (3.9" x 1.6") |
| Mounting | Wall-mountable |
| Controls | Test/reset button |
| Indicators | Low-battery chirp with "Lb" display; malfunction chirp with "Err" display |
Frequently asked questions
Do I need to wire it into my home's electrical system?
No. It runs entirely on 3 AA batteries, so it mounts straight onto a wall with no wiring involved.
How do I know if the batteries are low?
The unit chirps every 30 seconds and shows "Lb" on the display, giving you a clear early warning before it stops working.
How quickly does it respond to carbon monoxide?
It depends on concentration — around 60–90 minutes at lower levels (50 ppm), down to as fast as 3 minutes at high levels (300 ppm).
Every order ships free with no minimum, and you have 30 days to return it. Real human support is here at Support@fioriscas.com.