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(27) 27 total reviews
FABISENSE 252C 4-in-1 Plug-in CO & Smoke Detector | CO, Smoke, Temp & Humidity | Dual Power | for Home & Office
FABISENSE 252C 4-in-1 Plug-in CO & Smoke Detector | CO, Smoke, Temp & Humidity | Dual Power | for Home & Office
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FABISENSE 4-in-1 Plug-in CO & Smoke Detector
The FABISENSE 252-C is a comprehensive 4-in-1 safety monitor that simultaneously detects carbon monoxide (CO), smoke, temperature, and humidity. With dual-mode power and flame-retardant construction, it's engineered for reliable, round-the-clock protection in homes, offices, and rental properties.
✅ Key Features
- CO Monitoring (0–1000 ppm): Electrochemical sensor continuously tracks CO levels and triggers an alarm before concentrations become dangerous.
- Smoke Detection: Optical smoke sensor detects early-stage combustion particles, giving you precious extra minutes to respond before a fire spreads.
- Temperature & Humidity Monitoring: Real-time display of ambient temperature and relative humidity for complete indoor air awareness.
- Dual-Mode Power Design: Operates on standard socket power with backup power compatibility monitoring that never stops, even during power interruptions.
- Flame-Retardant Housing: Fire-resistant casing adds an extra layer of protection and ensures long-term durability in demanding environments.
- 85dB+ Audible Alarm: Loud alarm activates immediately when CO or smoke exceeds safe thresholds. Visual indicators provide dual-mode alerting.
- Plug-and-Play: Plugs into any standard 110–220V outlet. No tools, no wiring starts monitoring instantly.
⚠️ Alarm Thresholds
- CO 0–50 ppm: Safe normal operation, no alarm.
- CO 51–100 ppm: Warning audible alert. Ventilate the area immediately.
- CO 101–300 ppm: Danger loud alarm + visual alert. Evacuate and call emergency services.
- Smoke detected: Immediate alarm. Evacuate and call fire services.
⚙️ Technical Specifications
- CO Detection Range: 0–1000 ppm
- Smoke Detection: Optical sensor
- Monitoring: CO + Smoke + Temperature + Humidity
- Power: AC 110–220V plug-in (dual-mode)
- Housing: Flame-retardant material
- Alarm Level: ≥85 dB
- Certifications: CE / RoHS
📦 What's in the Box
- 1× FABISENSE 252-C 4-in-1 CO & Smoke Detector
- 1× User Manual
- 1× Warranty Card
FABISENSE Sense the Air. Stay Safe.












- 5 stars: 24 (89%)
- 4 stars: 3 (11%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I like the combined CO and smoke monitoring and the temperature and humidity readout. The alarm is quite loud, which is good, but the interface took me a few minutes to learn.
Installation could not be easier. The screen is useful, although I wish the viewing angle were a little wider.
The device works as expected and the display is clear. I would prefer slightly larger buttons, but overall I am happy with it.
It has a lot of useful functions for such a compact device. The plug-in setup keeps things simple.
We added this to the guest room for extra monitoring. It was easy to install and the display is easy to understand.
CO, smoke, temperature, and humidity in one device is a useful combination for our home.
We leave it plugged in all the time and check the readings whenever we walk by. Very convenient.
The audible alarm and on-screen indicators make the alerts easy to notice. The display is also easy to read from a distance.
We wanted something compact for our apartment. This unit gives us multiple functions without taking up much space.
It was ready to use almost immediately after plugging it in. The screen is bright and the menu is simple.
This replaced an older basic detector. I prefer having an actual display instead of only an indicator light.
We placed it near the bedrooms so we can monitor CO and smoke while also checking the room temperature and humidity.
The readings are clearly labeled and the device is not complicated to operate. A good option for everyday monitoring.
The plug-in format works well for us because there is no need to find a table or shelf for it.
The housing feels solid and the controls are simple. I like the flame-retardant design as an added feature.
I keep this in my home office. The display is clear and the device is easy to use day to day.
I bought it mainly for CO and smoke monitoring, but I also check the temperature and humidity readings regularly.
It fits neatly into a wall outlet and does not look bulky. The 4-in-1 design is very practical.
The alarm is loud enough to get your attention. The visual indicators on the screen are also helpful.
We use this in a small rental unit. It is compact, easy to install, and provides several useful readings on one screen.
The display makes it easy to see the current readings without pressing buttons. I like the straightforward layout.
Having CO and smoke detection together with temperature and humidity makes this more useful than our older detector.
No wiring or complicated installation was needed. I plugged it in and the unit was ready to monitor.
We installed this in the hallway near the bedrooms. The plug-in design is convenient and does not take up shelf space.
The screen is easy to read and gives a quick view of the room conditions. Setup only took a minute.
The combination of carbon monoxide and smoke monitoring is exactly what I wanted. The temperature and humidity display is a nice extra.
Plugged it into the wall and it started working right away. I like being able to see CO, smoke, temperature, and humidity information in one place.